eBay TB6560 Stepper Motor Driver Boards

[russell]

Doh - I think I must have had a senior moment last night! I was assuming that the current sense resistors were in series with the motor but of course they are the other side of the output bridge so the current is unidirectional there thus it should be going from 0 to 0.375 V.

Still the waveforms don't look right to me. I can't check on my board as I no longer have access to an oscilloscope but according to the data sheet the motor current waveforms should look like this:

The waveform across the current sense resistors will of course be rectified.

Hope that helps.

Russell.

[boldford]

Anyone trouble-shooting this module might find this and the hyperlinks shown there of some utility. http://www.drkfs.net/REVERSESTEPPER.htm

[Lovi]

Hi everyone!
I just made a video of the Chinese fake TBA 6560 IC's.
If your order came from china, better to check them, before powering on.

[russell]

I don't know where you found this information but according to the Toshiba data sheet pin 10 is power ground and pin 6 is signal ground so is not necessarily low impedance.

Pins 1, 17 22 are not ground as you suggest but are torque setting input, initial state sensing output, and excitation mode setting input, respectively.

Russell;

[Lovi]

You should watch the video carefully. We are talking about two different IC's in the same case.
Pins 1, 17 and 22 aren't groun in the real TB6560 but in the fake one. How could it be possible?
The right one marked as a 6560 ic, but it isn't, it is a 8435.

I don't know where you found this information but according to the Toshiba data sheet pin 10 is power ground and pin 6 is signal ground so is not necessarily low impedance.

Pins 1, 17 22 are not ground as you suggest but are torque setting input, initial state sensing output, and excitation mode setting input, respectively.

Russell;

[russell]

Ah, so what you are now saying is not that it is a fake IC but that it is an incorrectly marked one. Not the same thing.

Russell.

[Lovi]

Do you really think that such a big and responsible company like Toshiba would sell "incorrectly marked ICs"?
Why can't we find any incorrectly marked IC at the stores, buy 15 of 20 from the ebay? It's a simple fraud.
This products should be destroyed in the company. So you think Toshiba made a mistake with tonns of their ICs?

[rrossetti]

try www.diycnc.co.uk

system45 newer driver boards so no more squeeling

[dazp1976]

I'm using the 5 axis board with no problem at all on a 3 axis mill.
Haven't set up the relay to a spindle yet.
I got 5 boards when they were £3.25 ish a while back. Been running the first one for over a year so far for 3*425oz/in Nema23's (Chinese 3 axis set from bay). All took less than 2 weeks to turn up. Strapped them to some cheap Chinese C7 1605 ballscrews and ended up with only 0.03mm of backlash. That'll do :)

https://www.ebay.co.uk/itm/CNC-MACH3...3lCvoTC38Ory7A

Once I get something bigger though I'd like to go usb instead of parallel.