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MOONS’
MSSTAC6 Step Motor Drive User Manual
MOONS’
www.moons.com.cn
5
Trouble Shooting
Why does the drive indicate a motor ohm error when the motor is changed?
At power-up the drive automatically measures motor resistance, compares it with the last measured
value and stores it. If the resistance value varies by 40% or more, an error will be given The best way to deal
with this problem is to enter the proper motor parameters with the Configurator software.
Why does the drive indicate an over-voltage error after stopping from high
speed motion?
High speed motion generates high back EMF which can be transferred to the drive and destroy it after a
sudden stop. MOONS' recommends using an RC050 regeneration clamp to protect the drive in a high speed
application.
How is the function of "Electronic damping/Anti-resonance" used?
The anti-resonance feature is most effective in restraining midrange resonance of 5-20rps if the load
inertia can be set precisely. If the exact inertia is unknown, the best results are achieved through
experimentation.
How is the function of Waveform Smoothing used?
The Waveform Smoothing feature allows for fine adjustment of the phase current waveform harmonic
content to reduce low-speed torque ripple in the range of 0.25 to 1.5 rps. With some motors, such as
MOONS', there is no need to use this function.
