Damage to Print Bed?
Hi,
My MK3 still seems to be performing fine after about 20 hours of PLA printing. However, I have printed one part 5 or 6 times in the same position and the bed is showing signs of something. It is a square part 90mm each side printed in Prusa PLA with the MK3 temp settings set up in slicer.
There appears to be some bubbles or something forming under the surface around the perimeter of the part footprint and more noticeably at the corners. You cannot feel these bubbles as roughness but definitely the corner areas feel different (raised) when you run your finger over them. You can see these lines and a corner in the attached image.
Any idea what might be causing this? I'd hate to think I need a supply of beds!
Re: Damage to Print Bed?
From Josef Prusa himself:
"Many first-time users noticed microbubbles forming under the PEI sheet in the adhesive. That is fine and they will go away by themselves. Same happens on the MK2S. On MK3 alternate printing on both sides of the sheet, they will disappear faster. 🙂"
in https://www.prusaprinters.org/original-prusa-i3-mk3-2-months/
Re: Damage to Print Bed?
Phew! That's great to know. I'm new to this so just learning.
Many thanks for your prompt response Jo! Otherwise the printer is pretty awesome - way better quality than the two much more expensive machines we have in the office.......
Re: Damage to Print Bed?
Can also back this up. First noticed these bubbles after priting the included Benchy as my second print.
They seem to appear around the edges of the print, where pulling from thermal contraction forces are greatest. Usually they disappear within a couple of hours and have yet to do any damage to the bed or cause any quality problems for me.