print rising from bed and causing a crash
Hi All, I have had my printer for a couple of months and occasionally have the same issue. When printing a large item the PLA near the front right corner of the build plate bends up. I have tried using a large brim but this does not seem to help. I am trying to make a 4mm thick plate that is about 25mm less than the surface of the build plate (when using a 6mm brim). Prusa Slicer, Generic PLA 215 degrees for the extruder and 60 for the bed.
I am wondering if I make supports for that corner if that would help but I can't see how to force supports to be made for an item only 4mm tall.
RE: print rising from bed and causing a crash
Forcing supports:
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Chuck H
3D Printer Review Blog
RE: print rising from bed and causing a crash
To reduce the force of curling, you can try reducing heat loss from the bed's corners and print's corners by placing the printer in an enclosure, or if this is not practical, increasing the room temperature. Make sure there are no drafts (e.g. a fan in the room that happens to be blowing towards the printer).
RE: print rising from bed and causing a crash
I'll make another call-out for the Layerneer Bed Weld.
When I do a large flat item, such as a roof piece, in PLA, on the textured sheet, I'll put a dab of this where the corners will be. It will absolutely prevent any curl-up and separating like you describe.
RE: print rising from bed and causing a crash
Clean bed with dish soap.
First layer needs to be 100%.
Both these settings are for good sticking to the bed.
Extra, use glue stick, use a brim attach to model, first layer more heat in the extruder(10 degrees higher), bed 5-10 degrees higher.
Keep the printer out of wind.
RE: print rising from bed and causing a crash
I'm about 2 months into this, too.
I had a spot on the sheet that just wasn't sticking very well, especially with PETG. I got tired of bombing prints, and started with first layer calibration, and sure enough, same area, every time. I messed with temps and speeds and ultimately concluded that it was probably a contaminated surface. Who knows... skin oils, maybe cooking oils in the skin oils, residue from the gummy bear massacre...Whatever it was, that one spot was giving me issues.
So, wiped down with a paper towel that had been wet (damp to touch, not dripping) with acetone. Full surface left to right, then again in Y direction. One more time for good measure. Then wipe with isopropanol. Then, windex. (Because PETG.)
Fixed it for me.
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In theory, there is no difference between theory and practice. In practice, there is. -Yogi Berra