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FANUC Series 0i-MODEL D, Series 0i Mate-MODEL D. OPERATOR'S MANUAL - page 15

4.AUTOMATIC OPERATION

OPERATION

B-64304EN/02

5

The block number is searched for, and the program restart screen appears on the LCD display.

Fig. 4.9 (b) Program restart screen

DESTINATION shows the position at which machining is to restart.

DISTANCE TO GO shows the distance from the current tool position to the position where

machining is to restart. A number to the left of each axis name indicates the order of axes

(determined by parameter setting) along which the tool moves to the restart position.

The coordinates and amount of travel for restarting the program can be displayed for up to four axes.

For a path with five axes, when soft key [RSTR] is pressed again to display the fifth axis.

M

:

Up to 35 most recently specified M codes. The maximum number of displayed M codes

differs depending on the size of the display.

With 10.4-inch LCD/MDI panel : Up to 30 M codes

With 8.4-inch LCD/MDI panel : Up to 6 M codes

T

:

Two most recently specified T codes

S

:

Most recently specified S code

B

:

Most recently specified B code

Codes are displayed in the order in which they are specified. All codes are cleared by a

program restart command or cycle start in the reset state.

6

Turn the program re-start switch OFF. At this time, the figure at the left side of axis name

DISTANCE TO GO blinks.

7

Check the screen for the M, S, T, and B codes to be executed. If they are found, enter the MDI

mode, then execute the M, S, T, and B functions. After execution, restore the previous mode.

These codes are not displayed on the program restart screen.

8

Check that the distance indicated under DISTANCE TO GO is correct. Also check whether there

is the possibility that the tool might hit a workpiece or other objects when it moves to the machining

restart position. If such a possibility exists, move the tool manually to a position from which the

tool can move to the machining restart position without encountering any obstacles.

9

Press the cycle start button. The tool moves to the machining restart position at the dry run feedrate

sequentially along axes in the order specified by parameter No. 7310 settings. Machining is then

restarted.

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OPERATION

4.AUTOMATIC OPERATION

Outputting the M, S, T, and B codes for program restart

After the block to be restarted is searched for, you can perform the following operations:

1

Before the tool is moved to the machining restart position

<1> The most recently specified M, S, T, and B codes can automatically be output to the PMC.

The most recently specified S code is output as the maximum spindle speed when the S code is

specified in the block containing G92 or as the specified spindle speed in other cases. As the

most recently specified S code, only one S code is displayed on the program restart screen

regardless of whether the S code is specified in the block containing G92.

<2> While the block to be restarted is being searched for, all sampled M codes and most recently

specified S, T, and B codes can automatically be output to the PMC. Up to 35 M codes can be

sampled. If the number of sampled M codes exceeds 35, the 35 most recently specified M

codes are output to the PMC.

Switch between operations <1> and <2> using bit 6 (MOA) of parameter No. 7300.

2

Before the tool reaches the machining restart position

On the program restart screen, you can specify M, S, T, and B codes from the MDI panel in the

MEM or RMT mode without changing the mode.

Outputting the most recently specified M, S, T, and B codes

When bit 7 (MOU) of parameter No. 7300 is 1 and bit 6 (MOA) of parameter No. 7300 is 0, if the cycle

start button is pressed after searching for the block to be restarted, the last M, S, T, and B codes are

automatically output to PMC before moving to the machining restart point.

In the single block stop status, after the most recently specified M, S, T, and B codes are output, pressing

the cycle start switch again moves the tool to the machining restart position.

Outputting all M codes and most recently specified S, T, and B codes

When bit 7 (MOU) of parameter No. 7300 is 1 and bit 6 (MOA) of parameter No. 7300 is 1, if the cycle

start button is pressed after searching for the block to be restarted, all M codes and the last S, T, and B

codes are automatically output to PMC before moving to the machining restart point.

(Example)

When M10, M11, M12, M13, M14, T0101, S1000, and B10 are sampled, a program is executed in

the format shown below before the tool is moved to the machining restart position:

M10 T0101 S1000 B10 ;

M11 ;

M12 ;

M13 ;

M14 ;

Outputting M, S, T, and B codes on the program restart screen

When bit 7 (MOU) of parameter No. 7300 is set to 1, you can specify M, S, T, and B codes from the MDI

panel in the MEM or RMT mode without changing the mode after searching for the block to be restarted

until the tool reaches the machining restart position.

Procedure

1

When the block to be restarted is searched for using the program restart function, the program restart

screen appears. When bit 7 (MOP) of parameter No. 7300 is set to 1, operation soft keys

[OVERSTORE], [ERASE], and [INPUT] are displayed.

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4.AUTOMATIC OPERATION

OPERATION

B-64304EN/02

Fig. 4.9 (c) Program restart screen (outputting M, S, T, and B codes)

2

Before the tool reaches the machining restart position, pressing soft key [OVERSTORE] selects the

over store mode. In the over store mode, data can be entered in the M, S, T, and B fields displayed

in the (OVERSTORE) section.

To select the over store mode while the tool is moving to the machining restart position, hold restart

operation by feed hold and press soft key [OVERSTORE].

Enter M, S, T, and B codes to be output in the (OVERSTORE) section from the MDI panel.

(Example)

To enter M10, S1000, T101, and B20 in the (OVERSTORE) section:

<1> Enter

M

1

0

from the MDI panel.

<2> Press the [INPUT] key.

You can also enter the S, T, and B codes by performing steps <1> and <2>.

Fig. 4.9 (d) Program restart screen when M, S, T, and B codes are output

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OPERATION

4.AUTOMATIC OPERATION

3

When values have been entered in the (OVERSTORE) section, pressing the cycle start switch

outputs each code in the (OVERSTORE) section. The values in the (OVERSTORE) section are

cleared.

4

To clear the values entered in the (OVERSTORE) section as M, S, T, and B codes, press soft key

[ERASE]. All entered values are cleared.

5

Pressing soft key [OVERSTORE] again in the over store mode cancels the mode. Pressing the

reset key also cancels the over store mode.

6

To continue with restart operation, cancel the over store mode and press the cycle start switch.

CAUTION

1 The M, S, T, and B codes specified in the over store mode are not displayed on

the program restart screen.

2 In the over store mode, changing the operation mode to other than the MEM or

RMT mode does not cancel the over store mode. In this case, no values can

be entered in the (OVERSTORE) section.

3 In T series, do not specify a T code in the over store mode. If a T code is

specified, it is not executed.

Explanation

-

Block number

When the CNC is stopped, the number of executed blocks is displayed on the program screen or program

restart screen. The operator can specify the number of the block from which the program is to be

restarted, by referencing the number displayed on the screen. The displayed number indicates the

number of the block that was executed most recently. For example, to restart the program from the

block at which execution stopped, specify the displayed number, plus one.

The number of blocks is counted from the start of machining, assuming one NC line of a CNC program to

be one block.

(Example 1)

CNC Program

Number of blocks

O0001 ;

1

G90 G92 X0 Y0 Z0 ;

2

G01 X100. F100 ;

3

G01 Z-50. F50 ;

4

M30 ;

5

(Example 2)

CNC Program

Number of blocks

O0001 ;

1

G90 G92 X0 Y0 Z0 ;

2

G90 G00 Z100. ;

3

G81 X100. Y0. Z120. R-80. F50. ;

4

#1=#1+1 ;

4

#2=#2+1 ;

4

#3=#3+1 ;

4

G00 X0 Z0 ;

5

M30 ;

6

Macro statements are not counted as blocks.

-

Storing / clearing the block number

The block number is held in memory while no power is supplied.

The number can be cleared by cycle

start in the reset state.

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4.AUTOMATIC OPERATION

OPERATION

B-64304EN/02

-

M, S, and T commands not usable in over store mode

The M, S, and T functions listed below, unlike the other M, S, and T functions, have special meanings

within the CNC. These M, S, and T commands cannot be specified from the over store screen. To

specify these commands, cancel the over store mode, and execute them in MDI operation.

Example:

•

Rigid tapping

T

•

Spindle positioning

WARNING

As a rule, the tool cannot be returned to a correct position under the following

conditions.

Special care must be taken in the following cases since none of them cause an

alarm:

- Manual operation is performed when the manual absolute mode is OFF.

- Manual operation is performed when the machine is locked.

- When the mirror image is used. However, P type return is possible for a

block that switched between ON and OFF most recently or a subsequent

block. In this case, the mirror image signal status present when the program

was interrupted must be maintained.

- When no coordinate system is set up at the beginning of a program in which

main commands are executed in the incremental mode.

- When manual operation is performed in the course of axis movement for

returning operation.

- When the program restart is commanded for a block between the block for

skip cutting and subsequent absolute command block.

- When program restart is specified in the machine lock state, then the

machine lock is canceled.

- When program restart specified for an intermediate block for a multiple

repetitive canned cycle (T series)

- In general, when a coordinate system is set up, changed, or shifted after the

search operation ends, the tool cannot be returned to a correct position.

CAUTION

Keep the following in mind when restarting a program including macro variables.

- Common variable

When the program is restarted, the previous values are inherited as common

variables without being preset automatically. Before restarting the program,

initialize the appropriate variables to the original values used at start of the

previous automatic operation.

- DI/DO

At restart of the program, DI can be read by a system variable, but DO

cannot be output.

- Clock

When the program is being restarted, the clock time can be obtained by a

system variable, but the time cannot be preset.

- Tool offset and workpiece origin offset

When the program is being restarted, the offset can be read by a system

variable, but change of the offset is allowed only for the Q type.

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OPERATION

5.TEST OPERATION

5 TEST OPERATION

The following functions are used to check before actual machining whether the machine operates as

specified by the created program.

5.1 MACHINE LOCK AND AUXILIARY FUNCTION LOCK

403

5.2 FEEDRATE OVERRIDE

404

5.3 RAPID TRAVERSE OVERRIDE

405

5.4 DRY RUN

405

5.5 SINGLE BLOCK

406

5.1

MACHINE LOCK AND AUXILIARY FUNCTION LOCK

To display the change in the position without moving the tool, use machine lock.

There are two types of machine lock: all-axis machine lock, which stops the movement along all axes,

and specified-axis machine lock, which stops the movement along specified axes only. In addition,

auxiliary function lock, which disables M, S, T, and B (2nd auxiliary function) commands, is available

for checking a program together with machine lock.

Display unit

X

Y

Tool

Z

Workpiece

The tool does not move but the position

along each axis changes on the display.

Fig. 5.1 (a) Machine lock

Machine lock and auxiliary function lock

Procedure

-

Machine Lock

Press the machine lock switch on the operator's panel. The tool does not move but the position along each

axis changes on the display as if the tool were moving.

Some machines have a machine lock switch for each axis. On such machines, press the machine lock

switches for the axes along which the tool is to be stopped. Refer to the appropriate manual provided by

the machine tool builder for machine lock.

WARNING

The positional relationship between the workpiece coordinates and machine

coordinates may differ before and after automatic operation using machine lock.

In such a case, specify the workpiece coordinate system by using a coordinate

setting command or by performing manual reference position return.

-

Auxiliary function lock

Press the auxiliary function lock switch on the operator's panel. M, S, T, and B codes are disabled and not

executed. Refer to the appropriate manual provided by the machine tool builder for auxiliary function

lock.

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5.TEST OPERATION

OPERATION

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Limitation

-

M, S, T, B command by only machine lock

M, S, T and B commands are executed in the machine lock state.

-

Reference position return under machine lock

When a G27, G28, or G30 command is issued in the machine lock state, the command is accepted but the

tool does not move to the reference position and the reference position return LED does not go on.

-

M codes not locked by auxiliary function lock

M00, M01, M02, M30, M98, M99, and M198 (external subprogram call function) commands are

executed even in the auxiliary function lock state. M codes for calling a subprogram (parameters No.

6071 to 6079) and those for calling a custom macro (parameters No. 6080 to 6089) are also executed.

5.2

FEEDRATE OVERRIDE

A programmed feedrate can be reduced or increased by a percentage (%) selected by the override dial.

This feature is used to check a program.

For example, when a feedrate of 100 mm/min is specified in the program, setting the override dial to 50%

moves the tool at 50 mm/min.

Feedrate

100 mm/min

Tool

(Specified by programmed)

Check the machining by

Feedrate

50 mm/min after

altering the feedrate from

feedrate override

the value specified in the

program.

Workpiece

Fig. 5.2 (a) Feedrate override

Feedrate override

Procedure

Set the feedrate override dial to the desired percentage (%) on the machine operator's panel, before or

during automatic operation.

On some machines, the same dial is used for the feedrate override dial and jog feedrate dial. Refer to the

appropriate manual provided by the machine tool builder for feedrate override.

Limitation

-

Override range

The override that can be specified ranges from 0 to 254%. For individual machines, the range depends on

the specifications of the machine tool builder.

-

Override during thread

During the threading process, the override setting is ignored; it is always regarded as 100% during the

process.

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OPERATION

5.TEST OPERATION

5.3

RAPID TRAVERSE OVERRIDE

An override of four steps (F0, 25%, 50%, and 100%) can be applied to the rapid traverse rate. F0 is set by

a parameter No. 1421.

A rapid traverse override can be selected in steps of 1% or 0.1% in the range of 0 to 100%.

Rapid traverse rate

Override

5m/min

10m/min

50%

Fig. 5.3 (a) Rapid traverse override

Rapid traverse override

Procedure

Select one of the four feedrates with the rapid traverse override switch during rapid traverse.

Select a rapid traverse override in steps of 1% or 0.1%.

Refer to the appropriate manual provided by the machine tool builder for rapid traverse override.

Explanation

The following types of rapid traverse are available. Rapid traverse override can be applied for each of

them.

(1) Rapid traverse by G00

(2) Rapid traverse during a canned cycle

(3) Rapid traverse in G27, G28, G29 (M series), G30, G53

(4) Manual rapid traverse

(5) Rapid traverse of manual reference position return

5.4

DRY RUN

The tool is moved at the feedrate specified by a parameter regardless of the feedrate specified in the

program. This function is used for checking the movement of the tool under the state that the workpiece is

removed from the table.

Tool

Table

Fig. 5.4 (a) Dry run

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5.TEST OPERATION

OPERATION

B-64304EN/02

Dry run

Procedure

Press the dry run switch on the machine operator's panel during automatic operation.

The tool moves at the feedrate specified in a parameter. The rapid traverse switch (manual rapid traverse

selection signal) can also be used for changing the feedrate. Refer to the appropriate manual provided by

the machine tool builder for dry run.

Explanation

-

Dry run feedrate

The dry run feedrate changes as shown in the table below according to the rapid traverse switch (manual

rapid traverse selection signal) and parameters.

Table 5.4 (a) Feedrate during dry run

Program command

Rapid traverse switch

Rapid traverse

Cutting feed

ON

Rapid traverse rate

Dry run feedrate × Jvmax^(*2)

Dry run feedrate × JV,

OFF

Dry run feedrate × JV^(*2)

or rapid traverse rate ^(*1)

Max. cutting feedrate

Setting by parameter No.1430

Rapid traverse rate

Setting by parameter No.1420

Dry run feedrate

Setting by parameter No.1410

(^*1) Dry run feedrate × JV when parameter RDR (No. 1401#6) is 1. Rapid traverse rate when parameter

RDR is 0.

JV Jog feedrate override

(^*2) Clamped to the maximum cutting feedrate

Jvmax Maximum value of jog feedrate override

5.5

SINGLE BLOCK

Pressing the single block switch starts the single block mode. When the cycle start button is pressed in the

single block mode, the tool stops after a single block in the program is executed. Check the program in

the single block mode by executing the program block by block.

Cycle start

Cycle start

Tool

Cycle start

Stop

Stop

Workpiece

Stop

Fig. 5.5 (a) Single block

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OPERATION

5.TEST OPERATION

Single block

Procedure

1

Press the single block switch on the machine operator's panel.

The execution of the program is stopped after the current block is executed.

2

Press the cycle start button to execute the next block. The tool stops after the block is executed.

Refer to the appropriate manual provided by the machine tool builder for single block execution.

Explanation

-

Reference position return and single block

If G28, G29 (M series), and G30 are issued, the single block function is effective at the intermediate

point.

-

Single block during a canned cycle

In a canned cycle, the single block stop points are the end of <1>, <2>, and <6> shown below. When the

single block stop is made after the point <1> or <2>, the feed hold LED lights.

<1>

<2>

<6>

Rapid

traverse

<3>

Cutting feed

<5>

<4>

Fig. 5.5 (b) Single block during canned cycle

-

Subprogram call and single block

Single block stop is not performed in a block containing M98P_ ;. M99 ; or G65.

However, single block stop is even performed in a block with M98P_ or M99 command, if the block

contains an address other than O, N, P, L.

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6.SAFETY FUNCTIONS

OPERATION

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6 SAFETY FUNCTIONS

To immediately stop the machine for safety, press the Emergency stop button. To prevent the tool from

exceeding the stroke ends, Overtravel check and Stored stroke check are available. This chapter describes

emergency stop, overtravel check, and stored stroke check.

Chapter 6, "SAFETY FUNCTIONS", consists of the following sections:

6.1 EMERGENCY STOP

408

6.2 OVERTRAVEL

409

6.3 STORED STROKE CHECK

410

6.4 STROKE LIMIT CHECK BEFORE MOVE

414

6.5 WRONG OPERATION PREVENTION FUNCTIONS

416

6.1

EMERGENCY STOP

If you press Emergency Stop button on the machine operator's panel, the machine movement stops in a

moment.

Red

EMERGENCY STOP

Fig. 6.1 (a) Emergency stop

This button is locked when it is pressed. Although it varies with the machine tool builder, the button can

usually be unlocked by twisting it.

Explanation

EMERGENCY STOP interrupts the current to the motor.

Causes of trouble must be removed before the button is released.

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OPERATION

6.SAFETY FUNCTIONS

6.2

OVERTRAVEL

When the tool tries to move beyond the stroke end set by the machine tool limit switch, the tool

decelerates and stops because of working the limit switch and an OVER TRAVEL is displayed.

Deceleration

and stop

Y

X

Stroke end

Limit

switch

Fig. 6.2 (a) Overtravel

Explanation

-

Overtravel during automatic operation

When the tool touches a limit switch along an axis during automatic operation, the tool is decelerated and

stopped along all axes and an overtravel alarm is displayed.

-

Overtravel during manual operation

In manual operation, the tool is decelerated and stopped only along the axis for which the tool has

touched a limit switch. The tool still moves along the other axes.

-

Releasing overtravel

Press the reset button to reset the alarm after moving the tool to the safety direction by manual operation.

For details on operation, refer to the operator's manual of the machine tool builder.

Alarm

Table6.2 (a)

Alarm No.

Message

Description

The stroke limit switch in the positive direction was triggered.

This alarm is generated when the machine reaches the stroke end.

OT0506

+ OVERTRAVEL ( HARD )

When this alarm is not generated, feed of all axes is stopped during

automatic operation. During manual operation, only the feed of the axis

on which the alarm occurred is stopped.

The stroke limit switch in the negative direction was triggered.

This alarm is generated when the machine reaches the stroke end.

OT0507

- OVERTRAVEL ( HARD )

When this alarm is not generated, feed of all axes is stopped during

automatic operation. During manual operation, only the feed of the axis

on which the alarm occurred is stopped.

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6.SAFETY FUNCTIONS

OPERATION

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6.3

STORED STROKE CHECK

Three areas which the tool cannot enter can be specified with stored stroke check 1, stored stroke check 2,

and stored stroke check 3.

Stored stroke check 3

Stored

stroke

check 2

Stored stroke check 1

: Forbidden area for the tool

Fig. 6.3 (a) Stroke check

The following shows the areas which the tool cannot enter for each stored stroke check.

• Stored stroke check 1: Outside

• Stored stroke check 2: Outside or inside (switchable)

• Stored stroke check 3: Inside

When the tool moves into the forbidden area, an alarm is displayed and the tool is decelerated and

stopped.

When the tool enters a forbidden area and an alarm is generated, the tool can be moved in the reverse

direction from which the tool came.

Explanation

-

Stored stroke check 1

Parameters (Nos. 1320, 1321 or Nos. 1326, 1327) set boundary. Outside the area of the set limits is a

forbidden area. The machine tool builder usually sets this area as the maximum stroke.

When the tool enters a forbidden area and an alarm is generated, the tool can be moved in the reverse

direction from which the tool came.

At this time, a signal (overtravel alarm signal) can be output to the PMC if bit 6 (OTS) of parameter No.

1301 is set to 1. In addition, when the tool enters the forbidden area during manual operation, the signal

(overtravel alarm signal) can be output to the PMC without generating the alarm by setting bit 1 (NAL) of

parameter No. 1300 to 1. With this parameter setting, the alarm is generated when the tool enters the

forbidden area during automatic operation.

CAUTION

1 If the two points for specifying a forbidden area are identical, all areas are

handled as forbidden areas for stored stroke check 1.

2 The size of a forbidden area must be set carefully. If the size is set incorrectly,

the stroke becomes infinite.

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OPERATION

6.SAFETY FUNCTIONS

-

Stored stroke check 2

Parameters (Nos. 1322, 1323) or commands set these boundaries. Inside or outside the area of the limit

can be set as the forbidden area. Parameter OUT (No. 1300#0) selects either inside or outside as the

forbidden area.

In case of program command a G22 command forbids the tool to enter the forbidden area, and a G23

command permits the tool to enter the forbidden area.

Each of G22; and G23; should be commanded independently of another commands in a block.

The command below creates or changes the forbidden area:

G22 X_ Y_ Z_ I_ J_ K_ ;

(X, Y, Z)

(I, J, K)

X>I, Y>J, Z>K

Fig. 6.3 (b) Creating or changing the forbidden area using a program

When setting the area by parameters, points A and B in the figure below must be set.

A(X1, Y1, Z1)

B(X2, Y2, Z2)

X1>X2, Y1>Y2, Z1>Z2

Fig. 6.3 (c) Creating or changing the forbidden area using a parameters

The values X1, Y1, Z1, X2, Y2, and Z2, which are set by parameters No. 1322 and No. 1323, must be

specified by the distance from the machine coordinate system (machine unit). The values X, Y, Z, I, J,

and K, which are set by a G22 command, must be specified by the distance in the least input increment

(input unit).

Values set by a program are then converted in the machine increment and the values are set as the

parameters.

-

Stored stroke check 3

Set the boundary with parameters No. 1324 and 1325. The area inside the boundary becomes the

forbidden area. The values X1, Y1, Z1, X2, Y2, and Z2 must be set as coordinates (machine unit) in the

machine coordinate system.

CAUTION

1 If the two points for specifying a forbidden area are identical, all areas are

handled as movable areas for stored stroke check 2/3.

2 Even if the magnitude relation of the two points for specifying a forbidden area is

incorrectly set, a rectangular parallelepiped having the two points as apexes on

its diagonal line is assumed as the boundaries in stored stroke check 2/3.

3 Since an axis without the reference position return function has no forbidden

areas, there are no alarms about forbidden areas for the axis.

-

Checkpoints in the forbidden area

The parameter setting or programmed value (XYZIJK) depends on which part of the tool or tool holder is

checked for entering the forbidden area.

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6.SAFETY FUNCTIONS

OPERATION

B-64304EN/02

If point A (the top of the tool) is checked in Fig. 6.3(d), the distance "a" should be set as the data for the

stored stroke limit function. If point B (the tool chuck) is checked, the distance "b" must be set. A 点

When a tool tip such as point A is checked, if the length and diameter of the tool change variously, make

settings using the maximum length and diameter. This eliminates the setting for each tool and makes

machining safe.

• For machining center system

B

The position of the

tool after reference

position return

b

Area boundary

A

a

• For lathe system

b

B

a

A

The position of the

tool after reference

Forbitten area boundary

position return

Fig. 6.3 (d) Setting the forbidden area

-

Forbidden area overlapping

Area can be set in piles.

Setting the forbidden area overlapping

Fig. 6.3 (e) Setting the forbidden area overlapping

Unnecessary limits should be set beyond the machine stroke.

-

Condition under which each check is enabled

Each check becomes effective after the power is turned on and manual reference position return or

automatic reference position return by G28 has been performed.

After the power is turned on, if the reference position is in the forbidden area of each limit, an alarm is

generated immediately.

(Only in G22 mode for stored stroke check 2).

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OPERATION

6.SAFETY FUNCTIONS

-

Releasing the alarms

If the enters a forbidden area and an alarm is generated, the tool can be moved only in the backward

direction. To cancel the alarm, move the tool backward until it is outside the forbidden area and reset

the system. When the alarm is canceled, the tool can be moved both backward and forward.

When bit 4 (OF1) of parameter No.1301 is 1, if the axis moves within the movable area after an alarm

occurs in stored stroke check 1, the OT alarm is cleared without a reset (automatic clearance function).

NOTE

In the following cases, the automatic clearance function is disabled. To clear an

alarm, make a reset.

1 An alarm is set to occur before the stored stroke limit is exceeded (bit 7 (BFA)

of parameter No. 1300 is 1).

2 Another over travel alarm (such as stored stroke check 2/3 and interference

check) occurs.

-

Change from G23 to G22 in a forbidden area

When G23 is switched to G22 in the forbidden area, the following results.

<1> When the forbidden area is inside, an alarm is informed in the next move.

<2> When the forbidden area is outside, an alarm is informed immediately.

-

Timing for displaying an alarm

In stored stroke check 1/2/3, parameter BFA (bit 7 of No. 1300) selects whether an alarm is displayed

immediately before the tool enters the forbidden area or immediately after the tool has entered the

forbidden area.

Alarm

Number

Message

Description

A movement in the positive direction exceeded stored

OT0500

+ OVERTRAVEL (SOFT 1)

stroke check 1.

A movement in the negative direction exceeded stored

OT0501

- OVERTRAVEL (SOFT 1)

stroke check 1.

A movement in the positive direction exceeded stored

OT0502

+ OVERTRAVEL (SOFT 2)

stroke check 2.

A movement in the negative direction exceeded stored

OT0503

- OVERTRAVEL (SOFT 2)

stroke check 2.

A movement in the positive direction exceeded stored

OT0504

+ OVERTRAVEL (SOFT 3)

stroke check 3.

A movement in the negative direction exceeded stored

OT0505

- OVERTRAVEL (SOFT 3)

stroke check 3.

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6.4

STROKE LIMIT CHECK BEFORE MOVE

During automatic operation, before the movement specified by a given block is started, whether the tool

enters the forbidden area defined by stored stroke check 1, 2, or 3 is checked by determining the position

of the end point from the current position of the machine and a specified amount of travel. If the tool is

found to enter the forbidden area defined by a stored stroke limit, the tool is stopped immediately upon

the start of movement for that block, and an alarm is displayed.

WARNING

Whether the coordinates of the end point, reached as a result of traversing the

distance specified in each block, are in a forbidden area is checked. In this case,

the path followed by a move command is not checked. However, if the tool

enters the forbidden area defined by stored stroke check 1, 2, or 3, an alarm is

issued. (See the examples below.)

Example 1)

Forbidden area defined by stored stroke

check 1 or 2

a

End point

Start point

The tool is stopped at point a according to stored stroke check 1 or 2.

Forbidden area defined by stored stroke

check 1 or 2

End point

Immediately upon movement commencing from the start point, the tool is stopped to enable a

stroke limit check before moving to be performed before movement.

Example 2)

Forbidden area defined by stored stroke

End point

check 2 or 3

a

The tool is stopped at point a according to stored stroke check 2 or 3.

Start point

Forbidden area defined by stored stroke

check 2 or 3

End

point

Immediately upon movement commencing from the start point, the tool is stopped to

enable a stroke limit check before moving to be performed before movement.

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Explanation

When a stroke limit check before moving is performed, whether to check the movement performed by a

G31 (skip) block and G37 (automatic tool length measurement (M series) or automatic tool compensation

(T series)) block can be determined using

(parameter NPC (No. 1301#2)).

Limitation

-

Machine lock

If machine lock is applied at the start of movement, no stroke limit check made before movement is

performed.

-

G23

When stored stroke check 2 is disabled (G23 mode), no check is made to determine whether the tool

enters the forbidden area defined by stored stroke check 2.

-

Program restart

When a program is restarted, an alarm is issued if the restart position is within a forbidden area.

-

Manual intervention following a feed hold stop

When the execution of a block is restarted after manual intervention following a feed hold stop, no alarm

is issued even if the end point following a manual intervention is within a forbidden area.

-

A block consisting of multiple operations

If a block consisting of multiple operations (such as a canned cycle and automatic reference position

return) is executed, an alarm is issued at the start point of any operation whose end point falls within a

inhibited area.

-

Cylindrical interpolation mode

In cylindrical interpolation mode, no check is made.

T

-

Polar coordinate interpolation mode

In polar coordinate interpolation mode, no check is made.

-

PMC axis control

No check is made for a movement based on PMC axis control.

Alarm

Table 6.4 (a) Alarm

Number

Message

Description

The block end point was found in the + side stroke limit prohibition

+ OVERTRAVEL

OT0510

area during a stroke check before movement.

( PRE-CHECK )

Modify the program.

The block end point was found in the - side stroke limit prohibition

- OVERTRAVEL

OT0511

area during a stroke check before movement.

( PRE-CHECK )

Modify the program.

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For example, assume that the effective data range for a certain tool offset number is set to -200. to 200,

and that you are going to input 100.[INPUT]. Even if you inadvertently press the 0 key one more time,

resulting in 1000.[INPUT], the input of 1000. is not accepted.

The function detects a setting mistake and prevents the program from running with invalid data.

-

Input screens for which this function is effective

• Tool compensation

• Workpiece origin offset

T

• Y-axis tool offset

• Workpiece shift

-

Settings

To enable this function, set an effective data range for each input screen on the operation confirmation

function setting screen. For information about how to display the individual setting screens, how to set

data ranges, and other details, see the items that describe the setting of the data ranges.

If the set data range is invalid, no data input is accepted. Correct the data range setting, and then input

data.

-

Disabling the function

The input data range check is disabled if you make any of the following settings on the operation

confirmation function setting screen.

• Both the upper and lower limit values for the tool offset number or workpiece coordinate system are

0.

• The upper and lower limit values for each offset are identical.

-

Messages displayed during the input data range check

When the cursor moves into an input field of an input screen, one of the following messages and warning

messages is displayed. No message is displayed when the input data range check is disabled.

When the set effective data range is valid

Message list 1

Input data status

Message

Color

The data in the input field is within the range.

Input range xxx - xxx

Black

The data in the input field is out of the range.

Input range xxx - xxx

Red

xxx: Upper and lower limit values

When the set effective data range is invalid

Message list 2

Range check status

Message

Color

Tool offset number overlap

NG SETTING (OFFSET NUM OVERLAP)

Red

Workpiece coordinate system overlap

NG SETTING (WORK COORD VAL OVERLAP)

Red

Invalid upper and lower limit values

NG SETTING (U-LMT AND L-LMT ILLEGAL)

Red

The message "NG SETTING (U-LMT AND L-LMT ILLEGAL)" is displayed in the following cases:

• The upper and lower limit values are reversed.

• The values are not effective (e.g., more pairs of offset numbers than allowed are set).

• Either of the tool offset numbers is 0.

-

Range check for data changed by G10 or system variable

If the data changed by G10 or system variable is out of the effective data range, the alarm PS0334

"OFFSET DATA OUT OF RANGE" is displayed.

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6.5.1.2 Confirmation of incremental input

This function displays a confirmation message when you attempt to input an incremental value by using

the [+INPUT] soft key.

Confirmation of incremental input

Explanation

-

Outline of the confirmation of incremental input

This function displays a confirmation message when you attempt to input an incremental value by using

the [+INPUT] soft key in any of the input screens listed below. It lets you confirm whether you really

want to change data or not before making that change.

For example, when you set 5.[+INPUT] for 10., the message "15. INPUT OK?" is displayed.

The function prevents improper absolute or incremental input operations.

NOTE

This function cannot be used to input two or more values consecutively by

delimiting them by semicolons (;).

-

Input screens for which this function is effective

• Tool compensation

• Workpiece origin offset

• Settings

• Parameter

• Pitch error compensation

T

• Workpiece shift

• Y-axis tool offset

• Chuck tail stock barrier

-

Settings

In the operation confirmation function setting screen, check or uncheck the "INCREMENTAL INPUT"

box to enable or disable this function. For information about how to display the setting screen, how to

set the function, and other details, see the item “Operation confirmation setting” that describes the setting

of the operation confirmation function.

6.5.1.3 Prohibition of the absolute input by the soft key

This function prohibits the absolute input using the [INPUT] soft key.

Prohibition of the absolute input by the soft key

Explanation

-

Outline of the prohibition of the absolute input by the soft key

This function prohibits the absolute input by the [INPUT] soft key in the input screens listed later.

It prevents improper absolute or incremental input operations by requiring that the absolute input be made

using the

MDI key and that the incremental input be made using the [+INPUT] soft key.

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-

Input screens for which this function is effective

• Tool compensation

• Workpiece origin offset

T

• Y-axis tool offset

• Workpiece shift

-

Settings

In the operation confirmation function setting screen, check or uncheck the "DISABLED

SOFTKEY[INPUT] IN" box to enable or disable this function. For information about how to display

the setting screen, how to set the function, and other details, see the item “Operation confirmation setting”

that describes the setting of the operation confirmation function.

6.5.1.4 Confirmation of the deletion of the program

This function displays the confirmation message "DELETE PROGRAM ?" when you attempt to delete

the program.

Confirmation of the deletion of the program

Explanation

-

Outline of the confirmation of the deletion of the program

When you attempt to delete the program, this function displays the confirmation message "DELETE

PROGRAM (program name)?" It lets you confirm whether you really want to delete the program or not

before executing the deletion.

The function prevents the program from being deleted due to an improper operation.

-

Settings

In the operation confirmation function setting screen, check or uncheck the "PROGRAM DELETE" box

to enable or disable this function. For information about how to display the setting screen, how to set

the function, and other details, see the item “Operation confirmation setting” that describes the setting of

the operation confirmation function.

6.5.1.5 Confirmation of the deletion of all data

This function displays the confirmation message "DELETE ALL DATA?" when you attempt to delete all

data.

Confirmation of the deletion of all data

Explanation

-

Outline of the confirmation of the deletion of all data

When you attempt to delete all data on the input screen described later, this function displays the

confirmation message "DELETE ALL DATA?". It lets you confirm whether you really want to delete

all data or not before executing the deletion.

The function prevents all data from being deleted due to an improper operation.

-

Input screens for which this function is effective

• Tool compensation

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6.5.2.1 Display of updated modal information

This function allows modal information updated by the NC command or RESET to be highlighted in the

modal information display for the current block.

Display of updated modal information

Explanation

-

Outline of the display of updated modal information

This function allows modal information updated by the NC command or RESET to be highlighted in the

modal information display for the current block.

For example, when a absolute command has been changed to an incremental command or when the

workpiece coordinate system has been initialized by RESET, the function displays the changed part of the

data in an easy-to-recognize manner, in order to prevent improper operations during the execution of the

program.

-

Settings

In the operation confirmation function setting screen, check or uncheck the "UPDATE MODAL

HIGHLIGHT DISPLAY" box to enable or disable this function. For information about how to display

the setting screen, how to set the function, and other details, see the item “Operation confirmation setting”

that describes the setting of the operation confirmation function.

6.5.2.2 Start check signal

This function displays the remaining amount of travel and modal information of the block to be executed

and puts the program to a temporary halt before the program is executed.

Start check signal

Explanation

-

Outline of the start check signal

When a cycle start is made with the start check signal STCHK <G0408.0> set to 1, the function displays

the remaining amount of travel and modal information of the block to be executed and puts the program

to a temporary halt. Making the cycle start again resumes the execution of the program.

The function lets you check the status of the block before executing it, thus helping to prevent improper

operations at the time of execution.

Using this function in combination with the updated modal information display function described in the

preceding subsection makes it easier to check the status of the block to be executed.

-

Settings

This function does not require any setting on the operation confirmation function setting screen.

6.5.2.3 Axis status display

This function displays the axis status to the left of the axis name in the coordinate display screen.

Axis status display

Explanation

-

Outline of the axis status display

This function displays the axis status to the left of the axis name in the display of the machine coordinates,

absolute coordinates, relative coordinates, and remaining travel amounts.

For example, when the mirror image function is enabled for the X1 axis, the absolute coordinates are

displayed as follows.

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6.SAFETY FUNCTIONS

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ABSOLUTE

M X1

10.000

Y1

10.000

Z1

0.000

By displaying the axis status as shown above, the function prevents improper operations at the time of

execution.

-

Axis status indication

The axis status is indicated as follows. These indications are listed in order of priority.

AXIS DETACH

: D

INTERLOCK

: I

MACHINE LOCK : L

SERVO OFF

: S

Move command in progress or not in-position : *

MIRROR IMAGE

: M

-

Settings

In the operation confirmation function setting screen, check or uncheck the "AXIS STATUS DISPLAY"

box to enable or disable this function. For information about how to display the setting screen, how to

set the function, and other details, see the item “Operation confirmation setting” that describes the setting

of the operation confirmation function.

NOTE

For the 8.4-inch display unit, there is no indication on the program check screen.

6.5.2.4 Confirmation of the start from a middle block

This function displays a confirmation message when you attempt to execute a memory operation with the

cursor placed on a block in the middle of the program.

Confirmation of the start from a middle block

Explanation

-

Outline of the confirmation of the start from a middle block

This function displays the confirmation message "START FROM MIDDLE OF PROG

(START/RESET)" when you attempt to execute a memory operation with the cursor placed on a block in

the middle of the program. It lets you confirm whether you really want to start execution from that

block or not before executing the program.

The function prevents you from inadvertently making a cycle start from a block in the middle of the

program.

-

Settings

In the operation confirmation function setting screen, check or uncheck the "START FROM MIDDLE

OF PROGRAM" box to enable or disable this function. For information about how to display the

setting screen, how to set the function, and other details, see the item “Operation confirmation setting”

that describes the setting of the operation confirmation function.

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6.5.2.5 Data range check

This function lets you set an effective data range and check whether the data to be used for execution is

within the set range.

Data range check

Explanation

-

Outline of the data range check

This function lets you set an effective data range for each data item listed later and check whether the data

to be used for execution is within the set range. If the data is out of the effective range, the alarm

PS0334 "OFFSET DATA OUT OF EFFECTIVE RANGE" is displayed.

The function detects data setting mistakes and prevents the program from running with invalid data.

-

Data for which this function is effective

• Tool compensation

• Workpiece origin offset

T

• Y-axis tool offset

• Workpiece shift

NOTE

To use this function, you need to set each effective data range correctly. For

information about how to set the data ranges, see the item “Effective value range

for each data”.

6.5.2.6 Maximum incremental value check

This function checks the maximum incremental value specified for each axis by the NC command.

Maximum incremental value check

Explanation

-

Outline of the maximum incremental value check

When the maximum incremental value is specified by the NC command described later, make sure that

the absolute value of the travel distance by the incremental command does not exceed the specified value.

If the specified value is exceeded, the alarm PS0337 "EXCESS MAXIMUM INCREMENTAL VALUE"

is displayed.

A maximum incremental value can be specified on a per-axis basis and remains effective until 0 is set or

the value is reset.

For example, when advanced preview control (T series) / AI advanced preview control (M series)/AI

contour control (M series) is used, the function checks whether the amount of movement between blocks

is kept to the specified value or less. Through this process, it detects erroneous program settings and

prevents the program from running with invalid data.

-

Format

The format of the NC command used to specify the maximum incremental value is as follows.

G91.1 IP_ ;

IP_ ; Maximum incremental value

To cancel the maximum incremental value check, set 0.

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6.5.2.7 Warning display during a reset in program operation

When bit 6 (CLR) of parameter No. 3402 is 0, if a reset occurs during block execution in program

operation, modal information returns to the state before block execution.

This function display a warning to notifies the operator that modal information is not updated by

information of the interrupted block.

Warning display during a reset in program operation

Explanation

-

Overview of warning display during a reset in program operation

If a reset occurs during program operation, a warning saying "MODAL DATA IS CHANGED BY

BLOCK STOP" is issued. To enable or disable the warning, set bit 0 (MDW) of parameter No. 10334.

-

Warning occurrence condition

• When a reset occurs during program operation, if address G, F, H, D, T, S, M, or B (second auxiliary

function) was changed

-

Warning clear condition

• When a reset is issued

• When the <CAN> key is pressed

-

Warning displaying screen

NOTE

There is no function for acquiring or displaying a warning message in C

Language Executor. Accordingly, this warning cannot be displayed on a screen

created by the machine tool builder.

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6.SAFETY FUNCTIONS

6.5.3

Setting Screen

This section describes how to display the operation confirmation function setting screen and how to set

the individual data items on this screen.

The operation confirmation function setting screen allows you to set the following items:

• Enabling or disabling each operation confirmation function

• Effective value range for the tool offset

• Effective value range for the workpiece origin offset

T

• Effective value range for the Y-axis tool offset

• Effective value range for the work shift

6.5.3.1 Operation confirmation function setting screen

This screen displays the enable/disable setting status of the following operation confirmation functions

and lets you change their settings.

(Hereinafter, the screen is referred to as the operation confirmation

function setting screen.)

• Confirmation of incremental input

• Prohibition of the absolute input by the soft key

• Confirmation of the deletion of the program

• Confirmation of the deletion of all data

• Confirmation of a data update during the data setting process

• Display of updated modal information

• Axis status display

• Confirmation of the start from a middle block

Displaying and setting the operation confirmation function setting screen

Procedure

1

Press the

function key.

2

Press the continuous menu key

at the right edge of the screen several times until the [GUARD]

soft key is displayed.

3

Click the [GUARD] soft key. The setting screen that was displayed last with relation to any

operation confirmation function is displayed (the operation confirmation function setting screen is

the first such screen that appears after the system is restarted).

4

If any screen other than the operation confirmation function setting screen is displayed, click the

[GUARD] soft key. The operation confirmation function setting screen is displayed.

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