![Quote](images/misc/quote_icon.png)
Originally Posted by
chester88
the reason you don't power it from the stepper power supply is
is that it defeats the purpose of opto isolation.
after saying that it should work anyways. Are you sure the power supply is providing power? some need a resister installed to work.
You need to connect the ground as well as the 5v for the opto side.
Then you need from EMC: enable, step, and direction pins
Did you connect a resister to the step drive? It doesn't mention what happens if there is no resister.