Usb smooth stepper

[JAZZCNC]

I'm not saying to connect two motors to one driver, but rather connect two drivers to one step output. The aim of a slaved axis would be to provide two identical step pulses anyway, yes? There's no feedback from the driver to the controller anyway, so it can't possibly adjust more synchronized with separate step pulses than with two parallelled identical?

I know what your saying but the answer is not simple and several factors play apart. The BOB output circuitry plays a hige part and like wise so does the drive input circuitry. Often output signals are buffered and filtered on the BOB and only have a certain amount of current available and if the drives are optoisolated which often they are there may not be enough current to drive both opto's correctly and then signals start going stray. This is just a simple version and there's more to it than this but the up shot is your playing with fire and likely prone to timing errors.

IMO why bother to go to all the trouble and time building the machine only to spoil and cripple it for the sake of a few more pounds.?