since a short time I get very inaccurate cornes and edges on my prints. What irritates me is that it is usually only one corner and others are printed completely clean. I have carried out the whole range of calibrations, but have not achieved any improvement. I use an A1 and print with BambuLab Matte PLA.
Every tip is most appreciated!
Thanks!
Two examples
1.) Temperature Tower: Backside of the overhang corner is perfect but the front side is inaccurate:
The A1 is placed on a desk, all windows and doors a closed, no direct sunlight, air condition is off, no fans, no radiators.
The temp tower was printed in the middle of the build-plate with the imperfect edge facing to the front. In the following screenshot I marked the imperfect edges of the open frame:
I have repeated the print with a 90° rotation. Looks almost identical. BUT: The painted seam on the inside corner was gone and back on the front side of the faulty edge. So it looks like this is the reason. On closer inspection of the corner, I can well imagine this:
Thank you for sharing. Quick solution: move the seam out of the edge.
Alternatively, (re)calibrate the flow and pressure advance to improve the printing at the corner.
Thanks for the hint with over extrusion, @MalcTheOracle. I re-calibrated the filament and printed the frame again – looks pretty much the same. Even with activated scarf joint option.
When I move the seam, as @JayZay mentioned, both edges are looking good. Now I’m asking myself if this can be the final solution. Will every edge with a seam look like this?
I can’t get out of my head what @MalcTheOracle said about the relation on the build-plate. So I did another test and printed this vortex fidget thing. This came out just as strange as my temperature tower. Three of the six vortex tips are looking very good and precise, three have turned out not very good. Can the problem be related to the position and orientation on the print bed?
The three good tips pointed to the backside of the build plate, like the good side of my temperature tower:
Usually, no. In a print with some edges, you can expect differences in the one with the seam. Nevertheless, it is not very noticeable.
I’m not certain, but it is possible. Since your printer is not within an enclosure, you need to assess the surroundings and find if the same external heat/cooling source is present and where. Besides that, it can be related to the path as @MalcTheOracle mentioned.
Typically, the slicer standard settings should be enough to hide the seam; as it fails, ensure that external factors affect the printing and that the filament is in mint conditions and calibrated. If the issue persists, you can try tweaking, e.g., changing the wall print order (it can improve drastically in cases like yours), increasing retraction at the seam, etc.
Okay, I prepared the room: All windows and doors closed, blinds down, air condition off (as before), no heater, no fan, 22,7 °C.
I printed the vortex again four times with a brand new spool of filament:
In the prepared room with no changes to the filament or printer setting. Result: No change – still three bad tips (the ones pointing to the front of the printer) and three good tips.
Rotated the vortex on the build plate by 180 degrees and sliced again: No change at all, exactly the same result – bad ones still facing to the front, good ones still facing to the back.
Moved the vortex on the build plate by about 2 inches to the front: Now only one tip is bad and this one is now pointing to the back!
Switched the wall order from inside/outside to outside/inside: In general the print looks and feels a liiiiitle better then the others but there is still the same bad tip as on print no. 3. That’s so strange!
This is the bad tip in the slicer. It looks exactly the same then the others:
No, never. But I put an old Prusa Mini on the left side of the A1 and printed the Vortex Fidget with the same slicer settings and the same spool of filament. It came out absolutely perfect.
By the way same with my problem of horizontal edges on the outer walls. The Prusa Mini prints exactly the same model absolutely perfectly, no edges, nothing. I have never solved the problem.
Why dont you try to set following:
seam position: random
check smart scarf seam application
check scarf arround entire wall
check scarf joint for inner wall
check role based wipe speed
check avoid crossin a wall (advanced section)
wall order: inner/outer
maybe change the speed to 50% of sliced (silent mode)
try do print with lower layer height for example 0.1
