Fanuc alarm: 305 - APC alarm: nth-axis pulse error

CNC Machine Control Manufacturer
Fanuc
Control Model
16/18/21, 16i/18i/21i, 160i/180i/210i, 0/00/0-mate, 0i
305 - APC alarm: nth-axis pulse error

Alarm Description

nth-axis (n=1-8) APC pulse error alarm. APC alarm. APC or cable may be faulty.

Additional Suggestions & Alarm Clarification

Absolute pulse coder (APC)-, Sometimes can occur on power up for machines with a scale enabled instead of an encoder or even related to excessive slop in the drive system such as rotary tables.

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