RE: Questionable first benchy
First benchy on my Core One kit. Not super happy how it turned out. I’m new to 3d printing but I was pretty meticulous during the assembly. Followed tips for aligning the y rails and trapezoid nuts. I had a some trouble getting the belts within 3Hz while keeping the x rail square. Customer support walked me through an adjustment that helped a little, but still getting the constant rehoming calibration and banging before each print. Any tips what to check for first?
RE: Questionable first benchy
Mine looked worse than that. I've got a factory assembled printer, but was using Bambu PLA and not Prusa PLA. I'm not impressed.
RE:
For the horizontal cracks at the bottom of the round window: I suspect the filament isn't dry (it doesn't matter whether it was taken from a sealed bag). Most likely, using bone-dry material will fix this.
Head banging during homing is suspicious. Read up on "squaring the gantry". Short version, it needs to be perpendicular without any belt tension (bend sheet metal brackets), and it still needs to be perpendicular after tightening the belts (two belts, two screws).
RE: Questionable first benchy
Most of my issues have been resolved using more conservative slicer settings (balanced/structural instead of the rules Benchy preloaded on the USB), the correct profile for the filament (awareness of the silk PLA sample that was labeled as PLA), and replacing the main wire harness (z-axis and homing issues).
If I don't use the printer for a couple weeks, something weird still happens with z axis probing at the beginning of the print. The printer doesn't get a consistent reading for the bed level even though everything else appears to be working. If I stop the print and calibrate the z-axis, probing will work fine again.
I also suspect there is also some inconsistency between the thread pitch on my lead screws.