Heatbed error  

RE: Heatbed error

The first thing I would check would be the electrical connections to the heatbed, both on the bed and in the electronics box.  Be sure they are properly seated and tight.

RE: Heatbed error

Posted by: @jhbailey988

My Mk2S seems to not be able to heat beyond about 75 degrees or so...sometimes it will hit 80. But then it stops with the "Headbed Error" message.  Seems to be fine with PLA, but no good for PETG.  This is a problem as I have purchased the 2.5 upgrade, which I understand requires some PETG printing.

So, my question is how to proceed from here?  Should I replace the heatbed?  Is there something shy of that?  I've gone through the diagnostics recommended for that error, and nothing seems amiss beyond the inability to go beyond about 75 to 80 degrees C. 

Thanks in advance for any advice/insight

 

Jack Bailey

Make sure that the ambient temp. is stable. Also check if the thermistor is properly seated under the heatbed (golden capton tape). All wires should be correctly plugged. Check thermistor resistance - should be 100kohms at 25degrees C.

RE: Heatbed error

@jsw

Thanks for your input.  I measured the heatbed voltage during a heating cycle; it was 11.55 v and varied maybe .05 volts.  I also measured the thermister resistance, it was about 1ook at room temp, and moved to smaller values as the heatbed warmed (I used a heat gun). 

Then this afternoon my upgrade kit arrived,and I tried using that new heatbed - it heated to 90 degrees c with no difficulty.  So I think the original heatbed itself has some sort of thermal problem - maybe the element itself expands or contracts somewhere and opens up?  I'm going to see if I can just use the new heatbed without changing the e axis at all.  It went in easy, but now I'm having xyz calibration failure.

My guess is this heatbed is a different thickness and the pinda probe needs to be nudged down a bit.  

Again, any thoughts or advice are welcome.

Jack