Troubleshooting
11-2
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‘no Sig’ or ‘SIG FAIL’
appears in the display.
This indicates that the unit is not receiving a proper signal from the encoder.
• Check that the encoder connections are secure.
• Check that there is no damage to the connectors or to the encoder.
• Switch the C80 off and back on again.
• Swap the encoder to another axis to confirm whether the encoder or the C80 is at fault.
See To swap encoders to trace a fault: on page 11-3.
Readings are incorrect. • Check the Encoder Type to ensure it is correct.
• Check the Radius / Diameter setting. The Diameter setting causes the axis to read
double.
• Check the Error Compensation factors.
• If using the Segmented Error Compensation, verify the datum position.
• Swap the encoder to another axis to confirm whether the encoder or the C80 is at fault.
See To swap encoders to trace a fault: on page 11-3.
• Check that there is no damage to the encoder or its cable.
• Check that the encoder is fixed firmly and aligned correctly, as described in the Spherosyn
/ Microsyn Installation manual.
• Check that there is no binding on the scale. With the scale brackets slightly loosened, you
should be able to slide the scale back and forth with minimal resistance.
• If you have a Spherosyn scale, check that the scale is not bent, by removing it and rolling it
on a flat surface.
Symptom Solution
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