61531

Common Causes

• Infeed path parameter set too small for the grinding operation
• Z-axis encoder or feedback device not properly calibrated or damaged
• Z-axis servo drive fault or communication error with the control
• Tool wear or incorrect tool offset causing insufficient material removal
• Machine mechanical binding or backlash in Z-axis preventing accurate position registration

Troubleshooting Steps

1. 1Verify the infeed path parameter in CYCLE420 is set to an appropriate value; increase incrementally if currently too low for the grinding application
2. 2Check Z-axis encoder feedback in Diagnostics menu; confirm position display matches actual machine position and verify encoder connection integrity
3. 3Run Z-axis reference move (machine home) to reset position registration and clear any accumulated position errors
4. 4Test Z-axis servo response with manual JOG movements at various feed rates; listen for grinding or unusual sounds indicating mechanical issues
5. 5Review part program block %2 syntax and tool offset values; confirm they are compatible with CYCLE420 parameters and current setup