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UCCFusion controller troubleshooting

Fatal faults

The UCCFusion controller monitors a number of machine input/output signals and internal operational functions. If any of these reach a defined level where the system believes it is dangerous to operate, a fatal fault will be applied.

When a fatal fault is detected it is not possible to engage the servo system. There may be other faults that prevent the CMM from engaging. Not all are reported.

Reported fatal faultPossible cause
Emergency stop  • Emergency stop system activated
• Internal failure of servo power amplifier
Air pressure • Air pressure low
Crash• Crash switch activated
Scale failure • Scale readhead failed
• Scale “mis-count”
• Scale not connected
Overspeed The position demand has exceeded an internal defined limit
• Failure of a tacho feedback
• Incorrect scale resolution

Over temperature shutdown


The UCCFusion unit is designed for continuous power of up to 600 W.  The unit will allow a supply current consumption of up to 12 A, which at 60 V is 720 W for a short period of time (milli-seconds).


If this is sustained for a prolonged period, or the unit is not used in an adequate environment such as poor ventilation or high ambient temperature, the unit will disengage the motors to protect itself. An over temperature warning will be reported to UCCserver.

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