This is my 400mm 110v silicone heat made on my bed. Suddenly nothing would stick toy bed any more, regardless of temp, offset, and adhesion assistance agents. I finally looked at the center of the bed was puffy. I was able to slide a ruler in between the aluminum bed and the pad. It took a bit of elbow grease to pull off the edges. Dunno how close to disaster I was but it’s a little too close for comfort. It never overheated in all my use and the thermal fuse is still in tact but the scorch mark is still disturbing.
Oof, I can smell this picture. 🤢 Good thing you caught it before it burned.
Looks like the glue failed and so heat was building up instead of transferring.
Exactly. I don’t know the expected life span of 3m 468mp but apparently I exceeded it in my environment and duty cycle. I’m still working on getting the residue off of the bed however, and I can say that where it stuck, and did not fail, it did an excellent job, even pulling off bits of silicone with the glue.
What printer?
Custom. It started life as a tronxy x5sa-400 but I think only 2 steppers and the frame are original still. I changed the bed to a 16"2 *3/8 thick aluminum tool plate about 5 years ago. It always worked well for me. Unfortunately the silicone mat I used doesn’t seem to be made any more. I’m going to try one meant for a creality cr10 S4. I may have to re-machine the mounting holes for the thru holes on the mat tho.
tronxy x5sa-400
Ah you too decided to torture this printer.
I have had it since probably 2018? It was one of the original x5sa kits. Honestly it has been a good platform to learn off of
I’m starting to build a voron trident on it.
For now I stripped everything and only have the base frame.
I didn’t look super closely at first and thought this was one of those full build plate adhesion tests and was getting ready to say how it was a waste of time to get it that dialed in. Yeah, melting heat mat is definitely a problem.
