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Source of Amplifier Fault Error.


cbthans
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Running Turbo PMAC on GEO Brick controlling a Dover stage. One of the 5 stages we have is having problems. All stages are running the same code.

 

An error happens approximately once every 10 minutes of continuous motion.

 

The error is Amplifier Fault Error (Bit 3), Open Loop Mode, Also the Abort Deceleration in progress bit comes on.

 

There seems to be no resistance when moving the stage by hand.

 

Is there any diagnostics we can run, other error bits or anything else to narrow down what the problem source is?

 

Motors, Scales, Wiring, Physical Obstruction, Bad Tuning???

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Is there a way to see what the peak current is on a non fatal move?

Is the peak current value always 20amp or is it configurable? (Maybe our setting is wrong)

 

This way we can tell if we are always close to the limit or that we might have an intermittent gore cable problem that is shorting out a motor coil at certain locations.

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You might want to use an example in the Geo Brick User manual called "Calculating Motor Current Output Example". It will work with the Geo Brick LV, but note that the Max ADC values are different: 1.6925 A, 6.770 A, and 33.85 A for 0.25A/0.75A, 1A/3A, and 5A/15A Bricks, respectively.
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