I recently assembled a Printrbot Jr. and was able to connect to Repetier, and when I tried to manually control the bot it gave me the error, Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting).
But when I send the bot home it will return home so I know the axes motors are working.
I tried Pronterface and had the same problems.
Also the extruder won't heat up or read temperatures.
And where can I buy a cable to connect my fan to the board?
Thanks in advance