This is a query, as I don't have a firm idea either way. The question is this: On my 3D printer the 2 Y steppers, assuming a single available driver, were simply wired in parallel, with one pair reversed to make it drive correctly. My later card had 4 drivers available so the Y steppers had a drive each. Which is better & why? Now on to my CNC Router. I have a breakout card with 4 stepper outputs and 4 separate drivers, but now I want to run a 4th axis, so back to one output for the 2 Y axis motors. Do I parallel them at the output of the driver, or do I parallel the inputs to 2 drivers, buy an extra driver, thereby giving the steppers a driver each? I don't think I've seen it mentioned in any construction presentation and I perused many..