I have been running RAMPS 1.4 for about 6 months now. Yesterday after a 4 hour job I noticed a burnt electronics smell around the controller board, and now my heat bed wont stay for more than a minute. The fuse is too hot to touch, and the mosfet is also very hot.
Resistance of my heat bed (Mk2) - 2.6ohms
Voltage of 12v PSU for heatbed - 13.2 volts
The mosfet has a heatsink and the fuses are not touching. I assume something burnt out because of the classic burnt electronics smell even when it is off, but I can still control the heat bed and the fuse seems to still kick off when the pieces get too hot.
Got the board from 3dgadget. Also ordered some new MOSFET's last night...
Mike
Resistance of my heat bed (Mk2) - 2.6ohms
Voltage of 12v PSU for heatbed - 13.2 volts
The mosfet has a heatsink and the fuses are not touching. I assume something burnt out because of the classic burnt electronics smell even when it is off, but I can still control the heat bed and the fuse seems to still kick off when the pieces get too hot.
Got the board from 3dgadget. Also ordered some new MOSFET's last night...
Mike