Bed Thermal Runaway
Hi I have just finished building my printer all tests run all set up all ok. I have printed in PLA a few small items I then changed over to ABS. Using a nozzel temp of 235 and a bed temp of 90 the print starts and slowly is loosing bed temp until it stops with a bed thermal runaway. Any help would be much appreciated.
Bob
Re: Bed Thermal Runaway
Started printing the parts for the 2.5 upgrade on my MK2S. the two smallest parts worked fine. When printing larger parts the bed temperature very slowly decreases until it reaches 80 deg, then the print stops: BED THERMAL RUNAWAY.
I have checked the cables and contacts and all seems ok, wondering if it is too cold in my workshop and that the bed is cooled by the fan while printing. I will put some heat on in the the workshop room and also try to put some cardboard under the heated bed to insulate it. Thinking that it looses to much heat. May also try to box it in and see if that helps.
Any other ideas on how to solve this is very welcome. I have also been thinking that I could print the larger parts in PLA which works fine and in that way get a working MK2.5 and let it print its own PET parts. Please if you have ideas on this post it!
Re: Bed Thermal Runaway
In my case, this worked:
1 Increased the ambient temperature to ca 18 deg.
2 put two strips of cardboard (from the box I received from Prusa) below the heated bed
3 during final 10 minutes of printing when the bed temp was getting low again I put some pieces of cardboard on top of the bed adjacent to the printing area.
the placement of cardboard pieces on top of the bed was very efficient raising the temperature from 82 deg up to 90 degrees.
In this way I am hopeful that I will be able to print all the PET parts for the MK25 upgrade the next few days.
Probably only action 3 was needed, remains to be seen.