Category: Driver Boards
Sounds like maybe a damaged step/dir output.
It could also be marginal drive if you are using differential
wiring to a step motor drive. (its suggested to use
single ended drive with opto-isolated step/dir inputs
and differential drive with servo drives with line receiver inputs)
You can check the STEP/DIR outputs with a voltmeter.
When the 7I96S is first powered up, the STEP/DIR pins will
be in one state and when LinuxCNC is launched (before starting
any motion), the states will be reversed. With no load, the outputs
should equal the 5V supply voltage in one state and near 0V in
the other state.
