Prusa Mendel i2
Sanguinololu board with pololu steppers
This morning I was starting a bed-level before printing. Heated bed and extruder were both heating up. Suddenly the printer stopped mid-move. I noticed the black negative wire from my power supply to the Sanguinololu had come loose from it's terminal screw.
After reconnecting the wire, the printer has been acting strange. First, I could not get repetier host to send any commands to the printer at all. Whatever I tried to do (move an axis, turn on the heat bed, etc) I would just see "5 commands waiting" at the top.
I reflashed my firmware and checked all wiring connections again. Now I can connect to the printer, but something is still wrong.
- The Z axis won't move at all.
- The heat bed and nozzle heater won't turn on
- the bed thermistor and nozzle thermistor are both reporting a temp of 0 when checked via M105.
I have ruled out a motor issue by swapping the plugs on the board, plugging the Z axis into another axis and it works fine.
I have ruled out the pololu by swapping it with another axis and it too works fine.
Any ideas? The only thing I can think of is that somehow the wire coming loose caused a short somewhere in the board or in the Atmega chip?
