In my effort to get the SeeMeCNC H1 resurrected, I’ve been troubleshooting my Printrboard that I’m using as the controller.  The current firmware on the board assumes you have end-stops.  Since end-stops are normally closed, if they aren’t connected the board things you’ve hit the end of travel and stops any commands.  So I hooked up the end-stops (although not mounted) and they all work except for the Y-axis.  I found that when I hooked that up, the board wouldn’t properly boot and I couldn’t connect from Repetier.  A large amount of googling finally lead me to a problem with Rev D of the Printrboard. Continue reading →