Uhh sorry, I didn't mean to remove the capacitor near the stepper module. But I do get your point, thanks for your correction on micro-stepping wiring. I am aiming for the most precise micro-stepping mode the driver support. I don't know if there's anyone who use A4988 and configure the jumpers for 1/8 microstep or larger.Quote
re 3) I presume you talking about micro stepping jumpers, they get jumper-ed to +5v, not gnd. (unless your aiming for full step mode vs 1/16 mode)
The "jumper cap", is not that at all... see the big warning on [www.pololu.com]
They protect the drivers from voltage spikes, removing that would destroy the pololu modules regularly
re enable pins... X and Y are already joined.
In general If you leave them enabled all the time the stepper are energized and heating up, this is not the best idea. Thus you normally turn off whats not needed.
Most machines don't need Z on all the time.