Inconsistent First Layers vcore 3.1 w .6mm nozzle
I did the first layer test print yesterday after calibrating the probe offset. I eventually adjusted the z offset until the top surface of the first layer test was very smooth, let the print complete, and saved the adjustment to the config. Today I went to print a calibration cube, and the skirt and outer perimeters of the cube's first layer printed horribly. About halfway through the solid infill portion of the first layer it suddenly turned smooth again and the print completed properly. Attached are a photo showing the cube still on the bed, where you can see the very poor skirt, and a picture of the underside of the cube, where it goes from inconsistent to very nice.
7 Replies
xenial-black•13mo ago
I still need to do more to calibrate it, so ignore the gaps in the top layer and the rounded corners, I'm mostly concerned about why the skirt and outer perimeters started out so poor
I did update the nozzle size and the line width in Prusaslicer
I would try the first layer test again to verify if it indeed was all saved properly.
Do you measure the bed mesh on every print? If you saved one from the day before, things might have slightly changed due to heat changes since then
xenial-black•13mo ago
Correct, I do mesh the bed on every print. I managed to get a much better surface finish by changing a couple settings (first layer line width) to 0 in prusa slicer (so it does it's default calc based on nozzle size). There are some gaps in the perimeters at one corner and between the corners and the infill, but I will have to just work to tune those out. Right now I'm getting a pretty smooth first layer.
The artifacts youre getting now are most likely your pressure advance setting being too high. But you probably figured that out already 🙂
xenial-black•13mo ago
I hadn't yet but mostly because I haven't run the printer the last couple days. PA is definitely on my list to tune. Thank you for the insight!
I'd be interested in hearing how you fix these problems- I, too, just switched to a 0.6 mm nozzle and I'm getting gaps in the perimeter on the z-seam corner and some gaps between the infill and the perimeter. I've tried a wide variety of Pressure Advance settings, but I'm not seeing much change. Hopefully you find the winning combination!
xenial-black•13mo ago
I'll probably do some tuning this morning and will let you know if I figure anything out