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dc42
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the_digital_dentist
The driver in your photo looks like one of the problematic TB6600 units. I suggest you look into it
DD, can you elaborate - what are the problems?
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Wurstnase
Tb6600 needs afaik 5us high signal. So be careful that your firmware can handle this and has some config which will slow down your controller to achieve it.
Most controllers are too fast and have a high signal of maybe 1µs or less.