Weird Live Z Issue and Melting Parts MK3s
Hoping someone here can help with this weird issue. I have 37 days of print time on my machine and I just encountered my first major issue. I am running the latest firmware. I received my powder coated sheet and I started printing with PC. I was printing two 4 hour PC jobs, Running 270c nozzle and 122c bed and in an 37c enclosure, there was time between where I let the printer cool down.
I had to set my new live z height to -1.08 to get the first layer properly printing on the powder coated sheet. I then was able to print just fine. After printing my PC parts I then changed to PLA and started a new print. However the printer was now printing well above the bed! This has never happened before on many many prints so I was baffled. I had to adjust my live z to -1.5 to get it to adhere to the bed again. What would have caused this?
Additionally, I noticed a part had melted on my machine around the part fan. The same part in this post actually: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/mk3s-part-melted/ I also noticed my PINDA probe is angled, it looks like the bracket that holds it is warped (maybe from the high temps?).
I just tried printing PLA with the new lower live z and I can get a perfect first layer but as the machine goes higher the layers to not stick together. I can't make it past the first 5 layers anymore. It almost seems like when the printer moves to the next layer it moves a little too high and keeps moving higher causing the higher layers to essentially print in mid air?
Does anyone else have/had these issues before?
RE: Weird Live Z Issue and Melting Parts MK3s
Its the pinda probe that's used to measure position for the z height so the fact that the mount is angled means your pinda probe position has changed. There's an existing thread about this problem on the R4. Basically it has airflow issues that is causing the parts to melt when printing at high temps like for PC.
https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/mk3s-part-melted/ at the time of this reply the post was about 4 below this one lol.