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

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

SPA3 front panel led identification

LED status keyDescription
Green yellow red LEDs

LED on

Red flashing LED Green flashing LED

LED flashing off / on

Red and green flashing LED

LED flashing red / green

Clear LED

LED off

X

Any condition


  

Servo status

Probe seated

Error

Description

Clear LED

Clear LED

Clear LED

No power to SPA3

Red LED

Clear LED

Clear LED

UCC2 connected, waiting for download

Red LED

Green flashing LED

Red flashing LED

UCC T5 connected, waiting for download

Yellow LED

X

Clear LED

Download successful, amps not engaged
E-STOP released, amps not engaged

Red LED

X

Red LED

Download failed, power cycle required

Red and green flashing LED then Red LED

X

Clear LED

E-STOP active

Green LED

X

Clear LED

Axes engaged

Red and green flashing LED

Clear LED

Dynamic braking

X

Green flashing LED

Red LED

Scale error