User manual

User Manual SCA-SS-70-10
8. Basic Troubleshooting
The servo amplifier has included some different protective functions. Under voltage and
over temperature are monitored and shown with the LED’s at the front side.
Important:
The motor starts only by resetting the Enable. Before resetting an error by
resetting the Enable make sure that the cause of the failure is eliminated.
Motor oscillates
• The gain of the servo amplifier is too high. Reduce the gain pot or in IxR mode the
the IxR pot.
Motor runaway
• The feedback loop is open. Check wiring.
• The polarity of the motor or of the tacho is permuted.
• Check the encoder wiring.
• No load at torque mode.
• Reduce the maximal speed with pot n max.
Motor noise
• Reduce gain with gain pot.
• Use additional choke in the motor
Motor has no torque
• Increase the admissible current with I max pot.
Motor drifts at standstill
• Adjust the offset with the offset pot.
• The input value for the set value isn’t stable.
Motor is going hot at standstill
• Use an additional choke in series with the motor (see accessories).
Motor speed too low
• Increase the range with pot n max.
• Increase the admissible current with I max pot.
• Supply voltage too low.
ElectroCraft
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E-Mail: [e-mail] www.electrocraft.com May 2009
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