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;