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Wow, the PMX is really having some quality control issues. Its a fabulous mount when it works but it is a bit touchy.
The cam pin has 2 threaded screws on either side of them. They are supposed to be 2.25 to 2.5 turns out from fully in. They control the tension.
If you have them too tight you may get stalls. If you have them too loose the gears will slip with a horrible grinding sound.
I am not saying this is your problem but if your motors are hot it sounds like they are straining. Perhaps this is why. At least its worth a check.
Perhaps the error message is not really stating the problem and it really should say it stalled.
SB will come through but its probably going to take some patience. But once all set it is a beautifully performing mount. I wish mine did not have that 3 way switch. Its simply not worth the drop in reliability to be able to loosen the gears easily. Its not like it was hard to do on a PME. So its not really even a feature that is worth it especially when it introduces so much fussiness. Its poorly engineered and needs to be redesigned to be more bulletproof and less sensitive to accurate adjustment.
Greg.
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