I'm running a RAMPS 1.4 kit that I assembled myself from ultimachine.com with Kliment's Sprinter firmware and Pronterface/ReplicatorG.
Initially I connected my heater to pin D9 on the board and realized D9 is for the fan. In ReplicatorG, I could get the heater to heat up by clicking on fan enable, the LED for D9 would turn on and I could see the thermistor readings.
Now, whenever I have my heater on D10, it won't turn on and the red LED for D10 doesn't turn on when I send commands from either ReplicatorG or Pronterface. However, it does turn on if I first preheat the heater by connecting the heater to D9, pass current through it by clicking fan enable for a few minutes, disconnecting, shutting down, switching heater to D10 pins, restarting and reconnecting. The heater works only after carrying out this sequence.
Any advice on what could be causing this would be appreciated
-ak
Edited 1 time(s). Last edit at 01/15/2012 11:19PM by d4rwen.