Irregular first layer - Sine Wave Extrusion
Hi everyone, I just got a Mini+ to replace my old anycubic kossel and I've been so blown away by the ease of use and quality it delivers, but lately it's been starting to make strange first layers, and for the life of me, I cannot figure out what's causing it and I can't find anything similar on google, has anyone ever seen this before?
The top object is what the first layers have looked like since I assembled the printer, and since about a week it's been doing the bottom thing.
It's as if it has a fluctuating extrusion rate on the first layer, like it's on a sine wave, it cycles between underextrusion & overextrusion, and adjusting the live z up and down makes no difference, at some point the layer either becomes completely squashed or gaps start showing up between the lines, but the pattern never goes away.
Every layer subsequent to the first looks perfect, it's not a general extruder problem, it only happens on the first layer.
Anyone know what could be causing it?
RE: Irregular first layer - Sine Wave Extrusion
Try to recalibrate the z height for first layer?
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Irregular first layer - Sine Wave Extrusion
Try to recalibrate the z height for first layer?
As I already stated, changing the Z-Height had no effect on the pattern.
I seem to have found the problem though, it looks like I was just pushing the volumetric flow through the 0.25 nozzle too far on that profile
first layer line width = 0.27
first layer height = 0.2
first layer speed = 30
Tuning those down to 0.25, 0.15, & 20 respectively, has resulted in a first layer that's once again smooth as a mirror.
It's really nuts how careful you have to be with such a fine nozzle, strange that subsequent layers can reach print speeds of 100mm/s without issue, but the first layer runs into clogging issues...
