Heated Bed karked it!

Hi guys,

Need some help to troubleshoot my bed which has just stopped after countless prints being fine...

What should I check for? What order should I check it in?

The bed feels room temp- so I don't think its the thermistor which reads 26C.

There's a red led on next to the mosfet. Im using arduino mega 2560 and ramps 1.4, with the PCB (mk2 I think) heated bed, with an aluminium plate.

Any ideas?

Thanks guys-

Rcc

Edited 1 time(s). Last edit at 04/11/2014 12:05AM by RCC.

If the LED is lit, then I assume you can read around 12v between the D8 terminals? If so, check the voltage at the bed where the wires are soldered for a similar reading. If that's ok, disconnect the wires from D8 and check the resistance of the bed (meter probes to the wires you disconnected) - should be around 1.2 to 1.4v.

---

_______________________________________
Waitaki 3D Printer

Resistance is in ohms, not volts.....

Yeah, I am a twat!

---

_______________________________________
Waitaki 3D Printer