
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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7.2.5 Optimum Torque Acceleration/Deceleration
Overview
This function enables acceleration/deceleration in accordance with the
torque characteristics of the motor and the characteristics of the
machines due to its friction and gravity and performs linear type
positioning with optimum acceleration/deceleration during look-ahead
acceleration/deceleration before interpolation..
Usually, because of the friction of the machine, gravity, the torque
characteristics of the motor, and other factors, the acceleration/
deceleration performance (torque for acceleration/deceleration) is
different with direction of movement, acceleration or deceleration. In
this function, acceleration pattern of rapid traverse for the following
situations, plus movement and acceleration, plus movement and
deceleration, minus movement and acceleration, minus movement and
deceleration can be set into parameters according to the torque for
acceleration/deceleration of each situation. Acceleration/deceleration
can be performed according to these parameter setting, so that the
most of the capability of the motor can be used and positioning time
can be reduced.
Tim e
Tim e
Acceleration
cc/Dec pattern is the same way in each condition.
Speed
ccelerati
on
and
Decelerati
on and
+ move
ccelerati
on
and
Decelerati
on and
- m ove
Fig. 7.2.5 (a) Conventional acceleration/declaration
Tim e
Speed
Tim e
Acceleration
cceleration
and
+ move
Deceleration
and
+ m ove
cc/Dec pattern can be changed in each condition.
cceleration
and
- m ove
Deceleration
and
- m ov e
Fig. 7.2.5 (b) Acceleration/deceleration with this function