What causes SRVO-063?

Poor controller or motor grounding letting electrical noise corrupt the counter. Genuine pulse coder failure. Phantom occurrence alongside SRVO-068 DTERR / 069 CRCERR / 070 STBERR - the communication alarms are the real story.

How do I fix SRVO-063?

Check SRVO-068/069/070 in the history first; if present, work those remedies. Verify the earth cable between controller and robot is secure at the grounding plate; reinforce motor-flange grounding on aux axes. If grounding is sound and it recurs alone, replace the motor, then perform pulse reset, power cycle, and mastering.

SRVO-063

SRVO-063: RCAL alarm (rotation counter abnormal)

The encoder's built-in rotation counter miscounted - the pulse coder's own bookkeeping is suspect.

What it means

The encoder's built-in rotation counter miscounted - the pulse coder's own bookkeeping is suspect. Frequently a grounding/noise story rather than a dead encoder, and sometimes not a real alarm at all: if it appears with SRVO-068/069/070, chase those instead.

Common causes

Ranked by what technicians most often find, most likely first.

Poor controller or motor grounding letting electrical noise corrupt the counter.
Genuine pulse coder failure.
Phantom occurrence alongside SRVO-068 DTERR / 069 CRCERR / 070 STBERR - the communication alarms are the real story.

How to fix it

Check SRVO-068/069/070 in the history first; if present, work those remedies.
Verify the earth cable between controller and robot is secure at the grounding plate; reinforce motor-flange grounding on aux axes.
If grounding is sound and it recurs alone, replace the motor, then perform pulse reset, power cycle, and mastering.

Quick facts

Category: Servo
Affected series: R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family: SRVO