I have been reading the forums and have learned a lot. I put my question in the “getting started” section as I am still very much a beginner.
I have been printing some parts and noticed that I was getting what I call a “biscuit” layer at the beginning of my prints.
I didn’t really mind as I was printing brackets but noticed those layers were really “bumpy” and it seemed like the nozzle dragged across it. So I reprinted another one and noticed about 20% or so into the print, extrusion seems very minimal and it really does look the head drags across the previously printed layers.
I also noticed that at times I would get the “print in air” issue (although not consistently).
Since I had the nozzle gouge the bed previously, I did the following to try and remedy the situation (not in order):
1- Replaced the removable print sheet
2- Replaced the hotend (added thermal paste to the thermistor per other posts even though I did not notice any temp. fluctuation on the hotend)
3- Realigned the proximity sensor per snapmaker recommendation
4- Performed extruder calibration
5- Performed bed levelling calibration (25 point).
You will see from the last picture that the print skirt looks squished on the right side despite the bed levelling and adjusting z offset (current at 0.15mm). I also just had the print in air happen again.
The only thing I can think of it that maybe my filament is bad? I have left it out (didn’t know about moisture). I have new ones but didn’t want to crack one open until I had checked everything else - especially since it does print after that “biscuit layer” is finished.
All printing is using the black PLA from snapmaker. Settings are 205 nozzle temp, 70 heated bed temp. As I am a beginner I am using Tinker CAD to create models (am looking at other platforms) and then Luban to import, slice and generate g code.
Thank you all for your time in reading this and I hope it is something easy