eBay TB6560 Stepper Motor Driver Boards

[Dan Brown]

Hows it going with that board then Mad professor? any joy with it yet?

I've now got exactly the same board and motors sitting on my table, i'm just waiting for my pci parallel port extension to turn up so i'm dying to find out how much money wasted/saved

[Mad Professor]

Dan Brown: I have not done any more testing since after removing the damaged chip.

I have tested that all the other axis are still working using my adjustable bench power supply, but I can only run the board / motors upto 15volts on this power supply.

But at this lower voltage my current rig is very slow, max of 200mm/min, for the very short time that the board was running at 36vdc I was closer to 450mm/min rapid move, not cutting.

I will be back to testing the current sence resistor and dip switches.

When using my scope with my bench PSU I always have to use my laptop on battery, as if the laptop on mains or a PC is used I get very strange readings on the scope software, so thats something else I have to look into.

[irving2008]

Dan Brown: I have not done any more testing since after removing the damaged chip.

I have tested that all the other axis are still working using my adjustable bench power supply, but I can only run the board / motors upto 15volts on this power supply.

But at this lower voltage my current rig is very slow, max of 200mm/min, for the very short time that the board was running at 36vdc I was closer to 450mm/min rapid move, not cutting.

I will be back to testing the current sence resistor and dip switches.

When using my scope with my bench PSU I always have to use my laptop on battery, as if the laptop on mains or a PC is used I get very strange readings on the scope software, so thats something else I have to look into.

As per my thread above, on 36v the max step rate for these motors is 900steps/sec, thats 270rpm or about 500mm/min on a 2mm pitch screw.

Sounds like you have some ground loop problems. Make sure stepper PSU and scope/PC are on same power socket so they are earth referenced together. I cant use the same PC as the scope and the driver for the stepper, for the same reason...