These artifacts show up on all of my prints at slower and fast speed. My first thought is something is loose however it does not seem to be.
My understanding is the vibration calibrations should give an error if your belts are loose. This is especially noticeable with PETG, or anything shiny.
Is this just what bed slingers do? Or will upgrading to a core xy printer mitigate this issue? I no longer have a core XY but I don’t recall this being nearly as big of an issue.
This is normal among all printers. They are called VFA’s (Vertical Fine Artifacts.) It is when the printer hits a resonate frequency and it transfers into the print. Every printer I owned or worked with has it. The best way to reduce it is to keep it lubricated and run calibrations frequently and make sure the printer is on a stable surface. Hope this helps.
One more note: Upgrading to corexy could help reduce VFA’s but the issue is still there (Prusa Core One specifically.)
Generally VFA’s are inherent for Core XY motion, much less so with cartesian. Cartesian motion has its own design limitations that transfer defects to parts but they are different from VFAs.
The defect the OP is seeing is common with cartesian machines.
I do have this issue with both of my A1 printers (Just not as bad as OP). Do you have a solution? This is my favorite way to test the problems because of the angles. Simple Universal Stand- Makerworld
You’re seeing ringing/ghosting artifacts near and around corners? This is caused by the print suddenly changing in directions. Remember that a “bed slinger” has to move and stop the full weight of the bed and the part when this happens. Looseness in the motion system such as belts or linear/rails guides translates to these imperfections.
The easiest way is to check to make sure your motion system is tight, printer is calibrated and most significantly is to simply print slower.
I was thinking more after this post, watched a review of the p2s and he printed a big piece in shiny stuff, most likely PETG and I noticed it had the same issues, just slightly less than mine.
PETG and silk seem to be the largest offenders.
Thanks for the tip! I try to make sure the printer is working to full potential.
Am I mistaken that running the vibration tests on bambu will throw and error fail if the belts are out of spec? I thought that was part of the reason for that test. or is that only the full vibration test done under calibration?
No you are not mistaken. Part of the vibration test is to make sure the belts are the correct tension. Even on the quick vibration test it let me know that the belt on the x axis needed to be tightened. After I tightened the belt, I ran the full vibration test (Standard procedure) to make sure I did it right and It even slightly reduced some of the VFA’s.
The vibration tests are mainly used mitigating the resonate frequencies and make the printer run quieter. Hope this helps.
One final note: Just for fun, I pulled out my old Ender 3 to see if it has a VFA problem. Surprisingly, It doesn’t have any. My main theory is that it prints so slow that there are genuinely no artifacts or it is covered up from all of the other errors that it is not noticeable.
So the thing is with a1 is that it’s built very steady and frame is stiff, but something is wrong with a1 input shapers, because if you run klipper test that shows what accelerations are safe for a1, and it’s up to 2000 mm/s², but my printer still have ringing on 2000. So there’s something wrong with algorithm, because that is an extremely slow for such printer, I’m guessing they choose intentionally high range shaper that couldn’t effectively reduce ringing and slows down printer too much.
I don’t really mind the slow speeds I just want the ringing gone. Even at 300 accelerations I still get it. I guess it was a 200 dollar printer I can’t expect much when the larger printers are doing it too.
