
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
- 811 -
- Setting the permissible acceleration change amount
The permissible acceleration change amount for each axis is set in
parameter No. 19522. When 0 is set in this parameter for a certain
axis, speed control with change of acceleration is not performed for
that axis.
- Parameter setting example
Suppose a figure shown below in which a straight line is followed by
an arc. Let the specified feedrate and the arc radius be 6000 mm/min
and 10 mm, respectively. Then, the Y-axis acceleration change
amount at the contact point of the linear and arc portions is obtained
as follows:
Y
Y-axis
acceleration
cceleration
Time
From straight line to arc
Specified feedrate: 6000 mm/min
cceleration
change amount:
1000 mm/s
2
rc radius: 10 mm
To suppress the change of acceleration to 300 mm/s
2
, set 300 mm/s
2
for the Y-axis in parameter No. 19522.
Note that the change of acceleration is determined from the
interpolation data of the CNC, so it may differ from the theoretical
value.
The actual machine is affected by acceleration/deceleration and other
factors, so the value to be set in the parameter should be determined
after adjustments are made.
- For successive linear interpolations
When there are successive linear interpolations, speed control with
change of acceleration obtains the deceleration feedrate from the
change in acceleration between the start point and end point of a
specified block.
2
2
/1000 smm
v
=