Heated Bed Not Heating.

[printbus]

Yeah, just removing the lightweight wires would leave the bed relay contacts in the normally open state, which wouldn't work. Hence the question about jumpering between the contacts being switched by the relay. I've never seen one of the heat beds with the relay. I'm not sure I follow what Colin has told you to do, but if it works out, great.

Also note that there are small LEDs near each of the MOSFETs on RAMPS. With 12V applied to RAMPS, those LEDs toggle on and off with the MOSFET states. They can be handy as an initial diagnostic on whether the RAMPS output is turning on and off.

[BLKKROW]

Yeah, just removing the lightweight wires would leave the bed relay contacts in the normally open state, which wouldn't work. Hence the question about jumpering between the contacts being switched by the relay. I've never seen one of the heat beds with the relay. I'm not sure I follow what Colin has told you to do, but if it works out, great.

Also note that there are small LEDs near each of the MOSFETs on RAMPS. With 12V applied to RAMPS, those LEDs toggle on and off with the MOSFET states. They can be handy as an initial diagnostic on whether the RAMPS output is turning on and off.

Thanks for that tip.

Essentially he is giving me the same advice that you are.

Edit: I got it fixed.

[pichuete]

Thanks for that tip.

Essentially he is giving me the same advice that you are.

Edit: I got it fixed.

i just built a pegasus for a friend and notice that too. the bed comes with a automotive relay. but from past experiences this big beds goes up and down a lot when not using PID TEMPs .

i was wondering is you can post a picture of what contacts you jumped. i dont have a multimeter in hand so will be very helpfull for in order to install the SSR.

thanks

[BLKKROW]

i just built a pegasus for a friend and notice that too. the bed comes with a automotive relay. but from past experiences this big beds goes up and down a lot when not using PID TEMPs .

i was wondering is you can post a picture of what contacts you jumped. i dont have a multimeter in hand so will be very helpfull for in order to install the SSR.

thanks

http://imgur.com/LHksYTw

Hopefully this helps. I have removed the smaller wires that were used for the relay. Instead I have it hooked up through my PSU and the SSR. The small wire you see is for the bed sensor.