controller and motors not fully communicating

HiI got a small DIY milling machine from a friend who bought it from some guy a couple of years ago. When I plug everything in, Linux opens up, and I can jog the axis on the screen, the ini folder looks like it's set up, the controller turns on, but the motors don't jog even though they get warm. I'm wondering if there's some communication issue and where to start. I have run a foam cutter with Linux and know the tiniest bit about this, but not sure where to start diagnosingHelp is appreciatedThanks  



 

I would do some simple electrical checks
like seeing if the direction signals going to
the step drives change from 0 to 5V
(or vice-versa) when you jog in opposite
directions.

sorry for not replying sooner. usually I get an email when a reply comes in. i also have not had time to tinker but i will check that out