oscillation in servo:
PROCEDURE: MACHINE OSCILLATIONS IN SERVO
Check for "noisy" or defective tach.
See "Check for Noisy Tach" section of Machine Oscillations in Trace.
Check for defective feedback device. Jog machine 1 inch and confirm (with a ruler) axis actually moved correct amount. If not, check axis setup parameters. If parameters are correct, change feedback device.
NOTE: If feedback device is scales, try cleaning scales and re-run test.
Monitor position feedback signal with oscilloscope (see INCON Systems prints for terminal numbers). If defective replace feedback device.
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