Where is the fountain of knowledge for learning about CNC setups / understanding them

[Doddy]

Just checked, and I should of said get TB6600 drivers if you do replace them.
TB6560 is the older chip, whereas the TB6600 is newer, far more resilient, and has better performance.

Which has also reminded me that the TB6560 has quite a large pulse width requirement. It needs a 10uS minimum pulse width, which limits it to 15KHz step rate. Some where in the Mach settings (think it's the motor tuning screen), there is a box for setting the pulse width. Make sure you have it set long enough.

The attached chart shows the key differences between the chips.

I was about to dismiss this - the controllers I've seen (and modded) have had a 74-series monostable oscillator to pulse-extend the clock signal - however the image of the board (and various clones thereof) don't appear to have this luxury, unless it's rear-mounted on the board? If not, this board is seriously junk. The 10us minimum pulse width is actually dependent on a capacitor value, and can be significantly longer than 10us dependent on value. Mach3 advertises a limit of 1-5us for step/dir pulses, but appears to let you enter a larger value (I can't test as my motion controller is hard-limited to 2.5us). I'd agree - experiment with larger pulse widths (and reducing the micro step to 1 will also help to limit the PRF to a sensible value)

EDIT: My bad - just checked, and the controllers I did modify are TB6600s, not 6560s.