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SPA3-2 troubleshooting
Fatal faults
The SPA3-2 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 fault | Possible cause |
|---|---|
Emergency stop | Emergency stop system activated Internal failure of servo power amplifier Faulty wiring |
Air pressure | Air pressure low Blocked machine air filter Incorrectly adjusted air regulator Faulty wiring or air switch |
Crash | Crash switch activated Incorrectly adjusted or faulty crash switch Faulty wiring |
Scale failure | Scale readhead failed Scale miscount Scale not connected Dirty or damaged scale Faulty wiring |
Overspeed | The position demand has exceeded an internal defined limit Failure of a tacho feedback Incorrect scale resolution Incompatible scale readhead Faulty wiring |
Over temperature | Fan filter blocked Prolonged high output current at high environment temperature Internal servo power amplifier fault |
SPA3-2 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.
LED status key
| Description |
|---|---|
 | LED on |
 | Red flash |
 | Green flash |
 | Alternating green and red flash |
 | LED off |
 | Any condition |
| Servo status | Probe seated | Error | Description |
|---|---|---|---|
| | | No power to SPA3-2 or input voltage too high |
 | | | UCC2-2 mode or UCC not connected |
| | | UCC connected waiting for download |
 | | | Download successful, amps not engaged E-STOP released |
| | | Dynamic braking |
| | | E-STOP active |
 | | | Amps engaged |
| | | Hardware error |