Dear friends,
I have a bad stepper driver board, that gives erratic stepper movements and I'm sure it is about the driver. While I was about to throw it out, I decided to give it a shot as the big TB6560 is an IC that I have several working drivers with.
One thing I want to do is to short the optocouplers linking parallel port to the IC. This has helped a great deal on other Chinese items. I have read elsewhere, they don't do their job anyway. What I have on the board though, is two 4N25s and one EL817. The last one is easy, but how do you short 4N25? My initial, though, untested guess was pins 1 and 4. But that was a few seconds away from burnt 5V regulator for the board. So, obviously something is very short. Too short. Can you help with jumpering this thing correctly, please?
Thank you for your time,
Edmunds
I have a bad stepper driver board, that gives erratic stepper movements and I'm sure it is about the driver. While I was about to throw it out, I decided to give it a shot as the big TB6560 is an IC that I have several working drivers with.
One thing I want to do is to short the optocouplers linking parallel port to the IC. This has helped a great deal on other Chinese items. I have read elsewhere, they don't do their job anyway. What I have on the board though, is two 4N25s and one EL817. The last one is easy, but how do you short 4N25? My initial, though, untested guess was pins 1 and 4. But that was a few seconds away from burnt 5V regulator for the board. So, obviously something is very short. Too short. Can you help with jumpering this thing correctly, please?
Thank you for your time,
Edmunds
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