Mitsubishi Electric FR-A700 Technical Manual page 206

PARAMETER
(2) Backlash measures [Pr. 29, 140 to 143]
A700 F700
Reduction gears have an engagement gap and have
a dead zone between forward rotation and reverse
rotation. This dead zone is called backlash, and this
gap disables a mechanical system from following
motor speed.
More specifically, a motor shaft develops excessive
torque when the direction of rotation changes or
when constant-speed operation shifts to
deceleration. Resulting in a sudden motor current
increase or regeneration status. Use "Backlash
measures" to avoid these conditions.
Set [Pr. 29 = 3] to use Backlash measures [Pr. 140 to
143].
Acceleration/deceleration pattern of Backlash
measures is linear acceleration/deceleration. The
acceleration/deceleration time is increased by the
stopping time.
[Pr.142]
f2
[Pr.140]
[Pr.13] f1
Time
t1
t2
[Pr.141]
[Pr.143]
240