Why does my printer add defects to my prints (nothing to do with slicer)? Answered
So I have a FDM 3D printer which I designed and built, it is very sturdy so I am sure that none of this is caused by flexing/resonances of the printer. My set up makes use of Repetier host and firmware, with cura being my preferred slicer. I have noticed that it has started to add strange details to my prints, both on corners and on rounded sides (see photos). These do not show up on the slicer preview, and when i switch between slicers (cura and slic3r) they still remain. This has led me to believe that it may be a issue on the printer side. I have watched the printer as it prints and they are definitely being added on purpose by the machine (as in no flexing/resonance/lack of tension in the belts). this made me think it might be a firmware issue. It also does not go away if I slow down the printer. This has only happened recently, but I can find no settings on the firmware that I have changed in this time period that would indicate something like this should happen. Just to be clear, in the photos, the near circular print should be perfectly circular, and the other print should have a perfectly square cross section. It also happens on both the models and the rafts/brims that I use. Any thoughts or ideas will be much appreciated.