Electronics, Components etc
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I've been trying to get (my 3rd) Dolly up and running; I'm having a problem with the bed. Every time I have set up this printer and tried to PID autotune the bed heater, I wind up smoking the mosfet on my RAMPS. I'm running a 12v system with a MK3 bed, 14AWG wire, and 1.1.8 Marlin. No shorts, and the resistance on the bed runs about 1.2 Ohms (not subtracting any from the meter leads). Any thoughts?
Depends on your mosfet whether it will cope. But you can limit the duty cycle in PID mode which will probably allow you to get away with it.
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