You think so 2D, you need to think like a slicer for this. Ironing works with abs as abs is easily sanded. Nozzle pushes residual plastic that goes beyond the -0.01 layer that was printed. The difference between doing that on A or B material are
a) Can be sanded?
b) Does it suffer from too much temperature? (PLA needs high sanding speed to avoid damaging the overhangs, but slow temperature increases the gloss of the finish while fast makes it more matte)
c) Can the nozzle beat the surface? Olsson ruby nozzles are specially great for this since it doesn’t suffer from being scratched against almost anything.
So for example neosanding Nylon problably is a bad idea (but nylon I don’t know how would behave)
The easiest way to know how would a surface behave neosanding it is by the common scratches we have always seen on past Cura releases (they have do a very good on the travel path planning to avoid this on most scenarios if you know what to adjust).
So abs? Indeed it can. Also his photos show that a) material was dragged to the center of the print area due spiral style. That’s probably the less useful print style to get sanding by the nozzle since it increases the drag on the nozzle, while zigzag style has more chances of filling the gap holes of the printed layer.
This reminds me a thing. Cura sanding does actually extrude a bit. For my latest tests for 2 pass sanding it works much better to not extrude. I suppose Cura team left an option to lower the extrusion rate while ironing, that should remove the issue the user has, but the finish look won’t change much except the blob on the inside of the letters.
I'm having some trouble with a fresh installation of Cura 3.1. When slicing my model Cura inserts a G0 (move) code and moves the nozzle 0.3mm upwards.
This causes the filament being painted too high, thus it has no contact with the heatbed.
When removing the 0.3mm offset everything works fine.
Does anybody know what's the problem here?
Thanks in advance