DC drive failure
Vol. 24 #1, March 1997
The sudden appearance of high fre quency vibration on an extruder can result from various causes, but one of the most common, but most difficult to diagnose, is a DC drive controller failure where one SCR fails or misfires, creating a chopped, or pulsed, output to the motor.
This condition often requires a scope and a trained drives technician to diagnose.
- Bill Kramer, American Kuhne Corp.
See also:
- Broken couplings
- Brush wear forecasting
- Drive motor start up
- Power factor
- Threaded commutators
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