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Troubleshooting

Fatal faults

The SPA3 monitors 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.

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 SPA3 unit is designed for continuous power of up to 800 W.  The unit will allow a supply current consumption of up to 12 A, which at 80 V is 960 W for a short period of time (1 second).

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

SPA3 visual diagnostics

Visual diagnostics - front panel with zoom - SPA3

A visual indication of the system status is provided by three LEDs on the front panel, providing assistance in diagnosing and rectifying system faults.

LED status key

 

Description

SPA3-2 visual diagnostics - Continuous green yellow red

LED on

SPA3-2 visual diagnostics - Red flash

Red flash

SPA3-2 visual diagnostics - Green flash

Green flash

SPA3-2 visual diagnostics - Green and red flash

Alternating green and red flash

SPA3-2 visual diagnostics - no LED

LED off

SPA3-2 visual diagnostics - any condition

Any condition

Servo statusProbe seatedErrorDescription
SPA3-2 visual diagnostics - no LEDSPA3-2 visual diagnostics - no LEDSPA3-2 visual diagnostics - no LED

No power to SPA3

SPA3-2 visual diagnostics - Continuous redSPA3-2 visual diagnostics - no LEDSPA3-2 visual diagnostics - no LED

UCC2 connected, waiting for download, or not connected to a controller

SPA3-2 visual diagnostics - Continuous redSPA3-2 visual diagnostics - any conditionSPA3-2 visual diagnostics - no LED

E-STOP active, or power amp has a fault

SPA3-2 visual diagnostics - Continuous redSPA3-2 visual diagnostics - Green flashSPA3-2 visual diagnostics - Red flash

UCC connected, waiting for download, or download failed

SPA3-2 visual diagnostics - Continuous yellowSPA3-2 visual diagnostics - any conditionSPA3-2 visual diagnostics - no LED

Amps not engaged and no amp fault

SPA3-2 visual diagnostics - Continuous greenSPA3-2 visual diagnostics - any conditionSPA3-2 visual diagnostics - no LED

Amps engaged

SPA3-2 visual diagnostics - Green and red flashSPA3-2 visual diagnostics - any conditionSPA3-2 visual diagnostics - no LED

Dynamic braking