How about tripping if the PID output is greater than a certain 
percentage and the encoder velocity is below a certain threshold?

Les

Peter C. Wallace wrote:

> I think the nuisance tripping can be avoided with the right time delay
> in other words if your PID output or integral term are saturated for more 
> than 
> 50 mS or so, you are running open loop so something is dreadfully wrong...
> 
>> I am a bit paranoid on this subject as this machine can be used as a
>> manual, using high resolution MPGs. Therefore a runaway could be quite
>> dangerous.
>>

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