
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63943EN-1/02
- 788 -
Explanation
Optimum torque acceleration/deceleration selects the acceleration
pattern set with parameters on the basis of the axial movement
direction and the acceleration/deceleration state, determines the
acceleration for each axis from the current speed, and controls the
tangential acceleration/deceleration for rapid traverse.
- Setting optimum torque acceleration/deceleration
When bit 0 (FAP) of parameter No. 19540 and bit 1 (LRP) of
parameter No. 1401 are set to 1, and a value other than 0 is set for any
one of the axes as the reference acceleration in parameter No. 1671 as
shown below, rapid traverse is accelerated/decelerated by optimum
torque acceleration/deceleration in the mode of look-ahead accelera-
tion/deceleration before interpolation.
Table 7.2.5 (a) Optimum torque acceleration/deceleration
FAP
19540#0
(Optimu
m torque
acc/dec)
LRP
1401#1
(Linear type
positioning)
Reference
accelerati
on
Bell-shaped
acceleration
change time
Acceleration
pattern
1 1 No.1671 No.1672
See "Setting an
acceleration
pattern".
To enable bell-shaped acceleration/deceleration in addition to
optimum torque acceleration/declaration, set the bell-shaped accel-
eration change time with parameter No.1672.
- Required conditions in addition to parameter setting
If the conditions for performing AI contour control and for
acceleration/deceleration before interpolation are satisfied, optimum
torque acceleration/deceleration is performed for accelerating and
decelerating rapid traverse. If rapid traverse is subject to optimum
torque acceleration/deceleration, after-interpolation acceleration/
deceleration does not apply to rapid traverse.
- Cases in which optimum torque acceleration/ deceleration is disabled
If optimum torque acceleration/deceleration is disabled by parameter
settings, or the required conditions other than parameter settings are
not satisfied, acceleration/deceleration after interpolation is used to
accelerate and decelerate rapid traverse.