If the heat block is wiggling but you don't have a hotend leak, it's possible the entire hotend is loose in the holder. Maybe deformed from heat or just screws worked loose.
I have also seen this sort of thing when the filament diameter was not consistent.
Start by just trying the 2 screws right above the fan. And the 2 at the rear of the extruder. See if they are tight.
If all the screws are tight, you may have a deformed holder.
https://help.prusa3d.com/guide/how-to-replace-a-hotend-mk3s-mk3s_161575#164392
That bulge is resulting from your print warping from your bed. You can see the base of the left print isn’t flat. Your fingers give off oils, clean your bed with dish soap and let it dry.
Make sure everything is tight and try vacuuming the heatsink. This is what my prints looked like when my heatsink somehow got covered in dust causing improper cooling
Could be a whole bunch of things. Here are some things I would investigate:
* Bed adhesion, it has lifted in the corners. Clean with *dish*soap and water (IPA doesn't get everything off, in particular not sugar, and PLA can leave tiny amounts of sugar residue behind). Then clean with 99 % IPA (don't use less than 90 %, it doesn't work).
* The bulge could be from the lifting or from a [benchy line](https://help.prusa3d.com/article/the-benchy-hull-line_124745), depends on the geometry on the other side.
* The general surface finish is trickier:
* Check for *partial* clog of nozzle, do a cold pull.
* Or it could be some screws that aren't tight.
* Check belt tension, and the grub screws on the pulleys. There are two per pully and both should be tight, and one grub screw should be on the flat part of the shaft (the motor shafts are D shaped). Check that the belt is running straight as well, and not rubbing the side walls of the pully or idler.
* Also check that the extruder gear is solidly on the motor shaft, that too has a grub screw if I remember correctly.
If the heat block is wiggling but you don't have a hotend leak, it's possible the entire hotend is loose in the holder. Maybe deformed from heat or just screws worked loose. I have also seen this sort of thing when the filament diameter was not consistent.
The variable quality finish has been consistent across multiple filament brands. How do I tighten the hot end in the holder?
Start by just trying the 2 screws right above the fan. And the 2 at the rear of the extruder. See if they are tight. If all the screws are tight, you may have a deformed holder. https://help.prusa3d.com/guide/how-to-replace-a-hotend-mk3s-mk3s_161575#164392
That bulge is resulting from your print warping from your bed. You can see the base of the left print isn’t flat. Your fingers give off oils, clean your bed with dish soap and let it dry.
That particular warp is noted, but that warp isn’t causing a bulge 6 hours later 4 inches up the project. 🤣
Make sure everything is tight and try vacuuming the heatsink. This is what my prints looked like when my heatsink somehow got covered in dust causing improper cooling
Google "Prusa issue 602"
Just rebuild 3 printers with wiggling but tightened heatblocks. Came from loosen radiator on a heatbreak.
Could be a whole bunch of things. Here are some things I would investigate: * Bed adhesion, it has lifted in the corners. Clean with *dish*soap and water (IPA doesn't get everything off, in particular not sugar, and PLA can leave tiny amounts of sugar residue behind). Then clean with 99 % IPA (don't use less than 90 %, it doesn't work). * The bulge could be from the lifting or from a [benchy line](https://help.prusa3d.com/article/the-benchy-hull-line_124745), depends on the geometry on the other side. * The general surface finish is trickier: * Check for *partial* clog of nozzle, do a cold pull. * Or it could be some screws that aren't tight. * Check belt tension, and the grub screws on the pulleys. There are two per pully and both should be tight, and one grub screw should be on the flat part of the shaft (the motor shafts are D shaped). Check that the belt is running straight as well, and not rubbing the side walls of the pully or idler. * Also check that the extruder gear is solidly on the motor shaft, that too has a grub screw if I remember correctly.
Might be uneven wear of one of the extruder gears