9
5. 2 STOP CURRENT set
CAUTION
z
Do not set STOP CURRENT level unnecessarily high. High STOP CURRENT causes heating of
motor and drive and finally it shortens the life of them.
z
If STOP CURRENT level is set too low, at the moment of start and stop, motor can make a shock
impact on machines or in vertical motion, moving carriage may fall slowly.
z
It is recommended that STOP CURRENT is set as low as possible through experiments.
z
The drive can be configured for automatic low power. The current supplied to the motor windings
will be reduced to a certain value specified STOP CURRENT SET 100 msec after motion is complete.
This operation is excellent to help control heating and reduce power consumption when not in motion.
(For example) Current drive RUN CURRENT is set 3A and STOP CURRENT is set 40%. Then the motor
current in motion is 3A and 100 msec after motor stop the motor current will become ( 3A
×
40% =)
1.2A.
z
When the frequency of drive input pulse is less than 0.1pps(0.1Hz), as the run current is alternating
at every pulse input, motor torque is also alternating. In this application, set the resolution of drive
higher and apply input pulse of higher frequency.
Fig.4 Run Current Set value
Fig. 5 Stop current set value
ON
0.7A
(0.5A)
1.2A
(0.6A)
2.7A
(1.1A)
2.5A
(1.0A)
2.3A
(0.9A)
2.0A
(0.8A)
1.7A
(0.7A)
3.4A
(1.5A)
3.2A
(1.4A)
3.2A
(1.3A)
3.0A
(1.2A)
3.7A
(1.8A)
3.6A
(1.7A)
3.5A
(1.6A)
4.0A
(2.0A)
3.8A
(1.9A)
1
ON
1
