Uhh….what’s going on here? 🫣
P1S, Fiberon PA6-CF20, Orca.
Outer wall speed 30mm/s.
Chamber at 55°C, nozzle 300°C, bed 50°C.
Previous print with this exact spool was flawless.
Dried multiple times in my AMS-HT at 85C, including right now during this print.
The banding is getting worse as the bed gets lower. Notice, though, it doesn’t appear on the surface immediately below the picatinny, and it’s also nearly non-existent on the left sides of the supports - but only for the first half of the print.
This print is still going. I’ve tried both Sport and Silent modes, as well as lowering the temp to 280° in 5° increments. There’s no warping anywhere, and the plate hasn’t lifted either. Notice the change in sheen in images 1 and 2 - odd as it is, that actually doesn’t correspond to any of my aforementioned speed/temp changes. I haven’t a clue why it suddenly became shinier there.
So with it becoming worse as the print height increases, of course I think something lead screw-related. My bed has crushed a print against the toolhead once after a power failure, but that was 6 months ago now, and this issue is only just showing up right now during this print. The spacing between the bands initially had me thinking lead screw as well, maybe a portion of each rotation was off, but as you can see in pictures 2 and 3 the spacing has suddenly tightened up a lot. Given the fact that the left-facing surfaces generally look better, I’m leaning toward something with the horizontal axes…I guess?
I’ll do the standard maintenance things once this print finishes, but, anyone have a clue what’s actually going on here?