Today I was printing with new filament and printed a bit too fast and jammed my machine. No biggie though, it's no like this hasn't happened before. I was disassembled the extruder and carriage to get to the thermistor so I could clear the jam. I then wanted to heat up just the thermistor using the hotebnd and push the jam out. However, when I went to heat the printer, the temperature reading never went up and it did not get hot.
I have successfully been printing and using this heating system for awhile and it has never given me any trouble. I then heated up the metal block which holds the hotend using a soldering iron, but the temperature reading in Pronterface did not change!
I checked the voltage on the RAMPS 1.4 board
Power: 12.13V
D8+: 12.13V
D8-:12.13V
D9+:12.13V
D9-: fluctuates between 0V-10.36V
D10+: 12.13V
D10-: 11.49V
The hotend is in D10, the fan is in D9, and I am not using a heated bed, so D8 is empty.
I'm thinking that there is either a problem with the wiring of the hotend or the RAMPS board.
I went into pins.h and changed the the pins around to do some tests.
D8- Fan works
D9- Fan works
D10- Fan turns on for a few seconds but does not stay on!...
I did the same thing for the Hot end but it did NOT heat up in any of these pins...
There's quite a bit going on...
Okay, as I was writing this, I remembered I have an old hotend that I could use to test with! AND it works! It heats up and reads just fine, however this hotend is for 3.0mm filament and I am strictly using 1.75mm so its not much use to me.
With all of that being said, would you recommend that I purchase a new hotend & thermistor? Or re-wire my current ones? Or something else?