Originally Posted by
arckivio
Hi to all on the forum. I've been reading loads on this forum as I've been building my CNC router but only joined tonight. My basic structure is more or less built but today I had a weird issue that I can't find an answer to anywhere.
Last weekend I wired all 3 steppers & sat them on my desk. They all worked fine using arrow keys in mach3's motor tuning. I attached the Y motor to the ball screw, but not the gantry, & that worked fine with the arrow keys. This weekend I also attached the X stepper to the gantry with the Z slide attached but now the arrow keys only worked in one direction. In the other direction, the down key just pulsed power for varying lengths of time. I panicked & thought I had a broken motor/driver or my X ballscrew was naff. None of those were the problem, X ballscrew & Z axis moved freely but when I tried the Y axis that worked last week, it was now doing the same as the X. On the down arrow, it just got intermittent power. After much head scratching & general panic, I thought of trying the tab button & using jog there. It all worked fine. Throughout this, the Z axis stepper motor sitting on the desk still worked fine.
If anyone has any ideas why the down arrow key is behaving like this on my X & Y, I'd really appreciate your thoughts. Thanks