Content .. 255 256 257 258 ..

FANUC Series 30i/300i/300is-MODEL A. Machining Center System. User's manual - page 257

A.PARAMETERS

APPENDIX

B-63944EN/03

- 2012 -

#7 #6 #5 #4 #3 #2 #1 #0

1606

MNJx

[Input type] Parameter input

[Data type] Bit axis

# 0

MNJx

In manual handle interrupt or automatic manual simultaneous

operation (interrupt type):
0: Only cutting feed acceleration/deceleration is enabled, and jog

feed acceleration/deceleration is disabled.

1: Both cutting feed acceleration/deceleration and jog feed

acceleration/deceleration are applied.

#7 #6 #5 #4 #3 #2 #1 #0

1610

CTBx

CTLx

[Input type] Parameter input

[Data type] Bit axis

# 0

CTLx

Acceleration/deceleration in cutting feed or dry run

0: Exponential acceleration/deceleration is applied.
1: Linear acceleration/deceleration after interpolation is applied.

# 1

CTBx

Acceleration/deceleration in cutting feed or dry run

0: Exponential acceleration/deceleration or linear acceleration/

deceleration is applied.
(depending on the setting in CTLx, bit 0 of parameter No.1610)

1: Bell-shaped acceleration/deceleration is applied.

1620

Time constant T or T1 used for linear acceleration/deceleration or

bell-shaped acceleration/deceleration in rapid traverse for each axis

[Input type] Parameter input

[Data type] Word axis

[Unit of data] msec

[Valid data range] 0 to 4000

Specify a time constant used for acceleration/deceleration in rapid
traverse.
[Example]
For linear acceleration/deceleration

Speed

Rapid traverse rate

(Parameter No. 1420)

Time

T : Setting of parameter No. 1620

B-63944EN/03

APPENDIX

A.PARAMETERS

- 2013 -

For bell-shaped acceleration/deceleration

Speed

Rapid traverse rate

(Parameter No. 1420)

Time

: Setting of parameter No. 1620

: Setting of parameter No. 1621

(However,

≥

must be satisfied.)

Total acceleration (deceleration) time : T

+ T

Time for linear portion

: T

‐

Time for curve portion

: T

1622

Time constant of acceleration/deceleration in cutting feed for each axis

[Input type] Parameter input

[Data type] Word axis

[Unit of data] msec

[Valid data range] 0 to 4000

Set the time constant used for exponential acceleration/deceleration in
cutting feed, bell-shaped acceleration/deceleration after interpolation
or linear acceleration/deceleration after interpolation in cutting feed
for each axis. Which type to use is selected with bits 1(CTBx) and
0(CTLx) of parameter No.1610. Except for special applications, the
same time constant must be set for all axes in this parameter. If the
time constants set for the axes differ from each other, proper straight
lines and arcs cannot be obtained.

1624

Time constant of acceleration/deceleration in jog feed for each axis.

[Input type] Parameter input

[Data type] Word axis

[Unit of data] msec

[Valid data range] 0 to 4000

Set the time constant used for acceleration/deceleration in jog feed for
each axis.

A.PARAMETERS

APPENDIX

B-63944EN/03

- 2014 -

1660

Maximum allowable acceleration rate in acceleration/deceleration before

interpolation for each axis

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm/sec

, inch/sec

, degree/sec

(machine unit)

[Minimum unit of data] Depend on the increment system of the applied axis

[Valid data range] Refer to the standard parameter setting table (D)

(When the machine system is metric system, 0.0 to +100000.0. When
the machine system is inch system, machine, 0.0 to +10000.0.)
Set a maximum allowable acceleration rate in acceleration/
deceleration before interpolation for each axis.
If a value greater than 100000.0 is set, the value is clamped to
100000.0.
If 0 is set, the specification of 100000.0 is assumed. If 0 is set for all
axes, however, acceleration/deceleration before interpolation is not
performed.

If a maximum allowable acceleration rate set for one axis is greater
than a maximum allowable acceleration rate set for another axis by a
factor or 2 or more, the feedrate at a corner where the direction of
travel abruptly changes can decrease temporarily.

1671

Maximum allowable acceleration rate in acceleration/deceleration before

interpolation for linear rapid traverse for each axis, or maximum allowable

reference acceleration rate in optimum torque acceleration/deceleration

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm/sec

, inch/sec

, degree/sec

(machine unit)

[Minimum unit of data] Depend on the increment system of the applied axis

[Valid data range] Refer to the standard parameter setting table (D)

(When the machine system is metric system, 0.0 to +100000.0. When
the machine system is inch system, machine, 0.0 to +10000.0.)
(1) Set a maximum allowable acceleration rate in acceleration/

deceleration before interpolation for linear rapid traverse.

If a value greater than 100000.0, the value is clamped to
100000.0.

If 0 is set, the specification of the following is assumed:

1000.0 mm/sec

100.0 inch/sec

100.0 degrees/sec

If 0 is specified for all axes, however, acceleration/deceleration
before interpolation is not performed.

(2) Maximum allowable reference acceleration rate in optimum

torque acceleration/deceleration

B-63944EN/03

APPENDIX

A.PARAMETERS

- 2015 -

1672

Acceleration change time of bell-shaped acceleration/deceleration before

interpolation for linear rapid traverse, or acceleration change time of

bell-shaped acceleration/deceleration in optimum torque

acceleration/deceleration

[Input type] Parameter input

[Data type] 2-word path

[Unit of data] msec

[Valid data range] 0 to 200

(1) Set an acceleration change time of bell-shaped acceleration/

deceleration for linear rapid traverse (time for changing from the
state of constant feedrate (A) to the state of constant
acceleration/deceleration (C) at the acceleration rate calculated
from the acceleration rate set in parameter No. 1671: time of (B)
in the figure below).

(2) Set an acceleration change time of bell-shaped acceleration/

deceleration in optimum torque acceleration/deceleration (time
for changing from the state of constant feedrate (A) to the state of
acceleration/deceleration (C) at the acceleration rate calculated
from optimum torque acceleration/deceleration: time of (B) in
the figure below).

F eedrate in tangent direction

M axim um   acceleration rate not
exceeding m axim um   allow able
acceleration rate  set by param eter
N o. 1671 for  each  axis is
autom atically calculated.

T im e set by param eter N o. 1672

(A )

(B )

(A )

(C )

A.PARAMETERS

APPENDIX

B-63944EN/03

- 2016 -

1710

Minimum deceleration ratio (MDR) for inner circular cutting feedrate change

by automatic corner override

[Input type] Parameter input

[Data type] Byte path

[Unit of data] %

[Valid data range] 0 to 100

Set a minimum deceleration ratio (MDR) for an inner circular cutting
feedrate change by automatic corner override.

In the case of circular cutting offset inward, the actual feedrate is
determined by a specified feedrate (F) as follows:

Thus, the feedrate along the programmed path satisfies the specified
value of F.

Programmed path

Tool center path

However, if Rc is too small when compared with Rp, Rc/Rp 0
results to stop the tool. So, a minimum deceleration ratio (MDR) is set,
and the feedrate of the tool is set to F

(MDR) when Rc/Rp

≤

MDR.

1711

Inner determination angle (

p) for inner corner override

[Input type] Parameter input

[Data type] Real path

[Unit of data] deg

[Minimum unit of data] Depend on the increment system of the reference axis

[Valid data range] 2 to 178

Set an inner determination angle for inner corner override in automatic
corner overriding.

1712

Override value for inner corner override

[Input type] Parameter input

[Data type] Byte path

[Unit of data] %

[Valid data range] 1 to 100

Set an inner corner override value in automatic corner overriding.

Rc:Radius of tool center

path

Rp:Programmed radius

B-63944EN/03

APPENDIX

A.PARAMETERS

- 2017 -

1713

Start distance (Le) for inner corner override

[Input type] Setting input

[Data type] Real path

[Unit of data] mm, inch (input unit)

[Minimum unit of data] Depend on the increment system of the reference axis

[Valid data range] 9 digit of minimum unit of data (refer to standard parameter setting

table (A))
(When the increment system is IS-B, -999999.999 to +999999.999)
Set a start distance for inner corner override in automatic corner
overriding.

1714

End distance (Ls) for inner corner override

[Input type] Setting input

[Data type] Real path

[Unit of data] mm, inch (input unit)

[Minimum unit of data] Depend on the increment system of the reference axis

[Valid data range] 9 digit of minimum unit of data (refer to standard parameter setting

table (A))
(When the increment system is IS-B, -999999.999 to +999999.999)
Set an end distance for inner corner override in automatic corner
overriding.

When

≤

p, an inner corner is assumed. (Parameter No. 1711 is used

to set

p.)

When a corner is determined to be an inner corner, an override is
applied to the feedrate in the range of Le in the previous block from
the intersection of the corner and in the range of Ls in the next block
from the intersection of the corner.
Distances Le and Ls represent linear distances from the intersection of
a corner to points on the tool center path.
Le and Ls are set in parameter No. 1713 and No. 1714.

Programmed path

Tool center path

An override is applied to the range from point a to point b.

A.PARAMETERS

APPENDIX

B-63944EN/03

- 2018 -

1732

Minimum allowable feedrate for the deceleration function based on

acceleration in circular interpolation

[Input type] Parameter input

[Data type] Real path

[Unit of data] mm/min, inch/min, degree/min (machine unit)

[Minimum unit of data] Depend on the increment system of the reference axis

[Valid data range] Refer to the standard parameter setting table (C)

(When the increment system is IS-B, 0.0 to +999000.0)
With the deceleration function based on acceleration in circular
interpolation, an optimum feedrate is automatically calculated so that
acceleration produced by changing the move direction in circular
interpolation does not exceed the maximum allowable acceleration
rate specified in parameter No. 1735.
If the radius of an arc is very small, a calculated feedrate may become
too low.
In such a case, the feedrate is prevented from decreasing below the
value specified in this parameter.

NOTE

During involute interpolation, the minimum
allowable feedrate of "clamping of acceleration
near a basic circle" in involute interpolation
automatic feedrate control is used.

1735

Maximum allowable acceleration rate for the deceleration function based on

acceleration in circular interpolation for each axis

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm/sec

, inch/sec

, degree/sec

(machine unit)

[Minimum unit of data] Depend on the increment system of the applied axis

[Valid data range] Refer to the standard parameter setting table (D)

(When the machine system is metric system, 0.0 to +100000.0. When
the machine system is inch system, machine, 0.0 to +10000.0.)
Set a maximum allowable acceleration rate for the deceleration
function based on acceleration in circular interpolation.
Feedrate is controlled so that acceleration produced by changing the
move direction in circular interpolation does not exceed the value
specified in this parameter.
For an axis with 0 set in this parameter, the deceleration function
based on acceleration is disabled.
If a different value is set in this parameter for each axis, a feedrate is
determined from the smaller of the acceleration rates specified for the
two circular axes.

NOTE

During involute interpolation, the minimum
allowable feedrate of "clamping of acceleration
near a basic circle" in involute interpolation
automatic feedrate control is used.

B-63944EN/03

APPENDIX

A.PARAMETERS

- 2019 -

1737

Maximum allowable acceleration rate for the deceleration function based on

acceleration in AI contour control for each axis

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm/sec

, inch/sec

, degree/sec

(machine unit)

[Minimum unit of data] Depend on the increment system of the applied axis

[Valid data range] Refer to the standard parameter setting table (D)

(When the machine system is metric system, 0.0 to +100000.0. When
the machine system is inch system, machine, 0.0 to +10000.0.)
Set a maximum allowable acceleration rate produced by changing the
tool move direction.
For an axis with 0 set in this parameter, the deceleration function
based on acceleration is disabled. If 0 is set for all axes, the
deceleration function based on acceleration is not performed.
In circular interpolation, however, the deceleration function based on
feedrate control using acceleration in circular interpolation (parameter
No. 1735) is enabled.

1738

Minimum allowable feedrate for the deceleration function based on

acceleration in AI contour control

[Input type] Parameter input

[Data type] Real path

[Unit of data] mm/min, inch/min, degree/min (machine unit)

[Minimum unit of data] Depend on the increment system of the reference axis

[Valid data range] Refer to the standard parameter setting table (C)

(When the increment system is IS-B, 0.0 to +999000.0)
With the deceleration function based on acceleration in AI contour
control, a feedrate most suitable for a desired figure is automatically
calculated.
Depending on the figure, however, the calculated feedrate may
become too low.
In such a case, the feedrate is prevented from decreasing below the
value specified in this parameter.
If overriding using the deceleration function based on cutting load is
enabled, a feedrate lower than the minimum allowable feedrate may
be used.

1769

Time constant for acceleration/deceleration after cutting feed interpolation in

the acceleration/deceleration before interpolation mode

[Input type] Parameter input

[Data type] Word axis

[Unit of data] msec

[Valid data range] 0 to 4000

In the acceleration/deceleration before interpolation mode as in AI
contour control, not the ordinary time constant (parameter No. 1622)
but the value of this parameter is used.
Be sure to specify the same time constant value for all axes except for
a special application. If different values are set, correct linear and
circular figures cannot be obtained.

Content .. 255 256 257 258 ..