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  1. 15-09-2015 #8
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom.
    JAZZCNC
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    It's more to do with the Controller issuing the step pulse on the rising edge and the drive set to process it on the falling edge there becomes a timing issue so when a direction change occurs the step is in front of the Dir and a step or MS is lost on each change of direction.

    Having the wires on the drive wrong way around will also cause this. So Step + being connected to Step- on BOB. Also a BOB with slow Opto's could cause this but seen has the OP tried direct to drives I reckon not.!
    Last edited by JAZZCNC; 15-09-2015 at 08:13 PM.
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