Not sure if the printer is starting higher or depositing too much material or what.
The slicer shows the seam as sticking up a tiny bit, but going through the gcode it’s not actually starting each layer at the seam, but one wall in:
Any idea why this might be happening? It was ruining all my PETG prints - the nub would catch on the nozzle in subsequent passes around on the same layer, get peeled up, and inevitably wreck things within the first couple layers.
Slowing the speeds down a lot makes it work out, but it’s still starting each layer with this tiny nub sticking up. Why can’t it start the new layer flat to that layer height?
This is a duplicate of another post I’ve just made but may be useful:
I really struggled yesterday with printing PETG with a 0.2 nozzle on my A1 mini.
To get it to work nicely I had to:
Switch from smooth to textured plate
Up bed temp from 70 to 80 (measuring the bed temp with an IR gun showed the bed temp to consistently be 10deg below the target temp)
Up nozzle temp from 255 to 265
Slow speeds down by 2/3rds and halve volumetric flow
Slow accelerations down to 1/10th
All worked very well in the end. I did the changes in three steps (plate/temps/speeds) and all got incrementally better. Ended up in a very nice part.
First failure was bed adhesion, second was lots of stringing and poor layer adhesion, third was vertical spikes where each deposit started that then picked up on the next pass.
Tried many, many different changes to settings but this issue still happens unless I turn the speed way, way down. Any other thoughts on a possible cause for this?
