2009/9/26 Sven Wesley <svenne.d...@gmail.com>:

> The machine have ballscrews with a 60:22 timing belt reduction. The belt
> wheel on the screw is clamped with a double nut assembly AND four lock nuts.
> I tried to turn it with force with no luck. I also made a mark to see if it
> moved compared to the nuts. And nope, it's rock solid.

Is it possible the encoder wheel is slipping on the motor shaft?
(assuming a directly-coupled encoder)

-- 
atp

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