I apologize that this isn't the answer you seek, but if you search bltouch on this website you will find enough guidance which in combination should be enough to get the job done. I bought the bltouch, assembled and tried to reconcile everything my search produced, and got as far as trying to deal w...

HI Ed,
I think your take on this is what I looked for. I'm going to try running the "bad" bed on another power supply at 24v and see what happens. I got no magic smoke on the RAMBO and the mosfets look fine.

Since I'm back online and printing like crazy, most of this is a bit academic. but ....

It's working fine. bed heat comes up when asked for. I still wonder what the earlier intermittence was. ???

Hi Ed, the worst thing is when there are two intermittent problems either of which can produce same symptom. It looks like present situation is that there is something which sometimes prevents power going to heat bed. If the little light doesn't light then the bed won't get hot. I would have thought...

New bed, New Rambo, and back in business. I did have a hiccup though. After getting everything reassembled and connections checked 4 times in different sequences I fired it up without the lid on the control box and got everything except hot bed. Unbelievable!?! So I rechecked connections again wiggl...

Kalborg, you were lucky. I thought trying my heat bed on the extruder heater socket looked attractive, but guess what? I tried it an fired my Rambo board. The fault which failed the heatbed was a shorted heat bed (reason so far unknown) which when connected to the extruder heater socket fired the bo...

Thanks Ed. I certainly hope what's happened doesn't remain a mystery. New heatbed and RAMBO show up on Friday so by end of weekend I ought to be back printing and have had a closer look at whichever turns out to be the faulty component.

Hi gentlemen, My M2 lives in the shop which is remote from home. I often turn it loose printing something which will take 18 hours, and then am not able to get back to it for a day, which means the RAMBO is powered up but the heaters have cooled down. So my question is whether there is any internal ...

Hi, I have same problem. I'm not at all certain whether bed or RAMBO is bad. I hadn't thought of trying the bed on the extruder heater connection, but have ordered both a new RAMBO and a new bed. I will try the new bed on my existing RAMBO and if it works, which will confirm there is nothing wrong w...

Hi Gwhite. My Dad,the EE, was good at this. In 1950 +/- we were returning from our Sunday picnic at the AutoClub on the Minnesota River near Shakopee. Our new White Chevy Convertible coasted slowly to a stop well out in the country (it was country then). For some reason Dad knew exactly what the pro...