Prusa MK4 - new bed warping issue
I've had a Prusa MK4 for about six months, and for the most part, it's been an awesome machine. I have been particularly pleased with first-layer performance - out of the box, it was able to print a perfect first layer, even for challenging prints with a bunch of small patches of filament that get connected together in higher layers.
However, over the past month, first-layer performance has degraded. Prints with small first-layer cross-sectional area no longer print consistently, and I need to print with a raft or a brim. And over the past two weeks, I've encountered increasing issues with corner warping. In some cases, the warping has been so severe that it ruined functional features of the print.
Here is an album demonstrating the issue with a current print: https://imgur.com/a/86nVpxw - this print is about 100mm tall, and even at an early stage after printing about 10mm, warping is apparent and significant.
Things I've tried that did not fix the problem:
1) Cleaning the bed with isopropyl wipes.
2) Flipping the bed over and using the other side.
3) Changing filament spools.
4) Bumping bed temperature up or down 5-10 degrees. (Higher temperatures increased the problem; lower temperatures resulted in bed adhesion failure.)
5) Adjusting PrusaSlicer print settings: image shaping vs. regular, layer height, etc.
Any suggestions? Thanks in advance.
RE: Prusa MK4 - new bed warping issue
Clean with dish soap well. That is better than alcohol. Increase bed temp but also measure bed with ir thermometer to ensure bed is properly heating. Consider a brim. Finally ive used glue stick near corners to enhance adhesion
RE: Prusa MK4 - new bed warping issue
Print warping and bed warping are 2 very different issues. Bed warping refers to an uneven bed that typically requires a replacement of the bed itself. Print warping means the object being printed has lifted corners/edges. To fix the latter, wash and clean the bed thoroughly while using a very fine grit (000) steel wool, and/or use a bed adhesion promoter e.g. PVP, PVA glue, MagiGoo etc.
RE: Prusa MK4 - new bed warping issue
Ita called Input Shaping Not Image Shaping.
I've had a Prusa MK4 for about six months, and for the most part, it's been an awesome machine. I have been particularly pleased with first-layer performance - out of the box, it was able to print a perfect first layer, even for challenging prints with a bunch of small patches of filament that get connected together in higher layers.
However, over the past month, first-layer performance has degraded. Prints with small first-layer cross-sectional area no longer print consistently, and I need to print with a raft or a brim. And over the past two weeks, I've encountered increasing issues with corner warping. In some cases, the warping has been so severe that it ruined functional features of the print.
Here is an album demonstrating the issue with a current print: https://imgur.com/a/86nVpxw - this print is about 100mm tall, and even at an early stage after printing about 10mm, warping is apparent and significant.
Things I've tried that did not fix the problem:
1) Cleaning the bed with isopropyl wipes.
2) Flipping the bed over and using the other side.
3) Changing filament spools.
4) Bumping bed temperature up or down 5-10 degrees. (Higher temperatures increased the problem; lower temperatures resulted in bed adhesion failure.)
5) Adjusting PrusaSlicer print settings: image shaping vs. regular, layer height, etc.
Any suggestions? Thanks in advance.
RE: Prusa MK4 - new bed warping issue
I'm don't know where you are located, but my first impulse is to consider seasonal temperature/weather shifts as a contributor alongside the machine causes. Even if the printer isn't located in a garage with larger temperature swings, as winter comes on in the northern hemisphere, I'm expecting to have to either adjust my expectations and settings or build a simple enclosure for larger flat prints to raise ambient temps and stabilize things.
-J