Re: Poor output from Arduino CNC Shield v3
Aside from the 24VDC power supply, and the use of very low power drivers, that combined may not be providing the amount of power needed for the steppers (what is the ratings of them?), the stepper itself is only supported along the two rear bolts, not ideal at all, I would be amazed if you don't get some movement there when the Z is moving.
The other thing to check is if the cutter is flexing, although it looks like you cut it with a larger Vee bit?
Also, have you checked if you have any binding anywhere that would cause a jerky response?
Missed steps, too fast feed rate, wrong settings, etc, are other possible reasons for what you're seeing.
Does the Z axis have any play, is the leadscrew supported by bearing blocks top and bottom, or just a bearing inserted into the frame? Etc, etc.
cheers, Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!