Ironing trouble in Cura 4.2
sungod3k last edited by
maybe you've heard of the ironing feature in Cura 4, which can flatten all even surfaces on a print be having the nozzle run over it without (or very little) extrusion. The resulting top surfaces are super smooth. Check out CHEPs video on it here.
I tested that yesterday on a model with multiple flat surfaces on different heights, which resulted in the extruder grinding the filamentment. This is probably because the default 10% flow while ironing were still too much. So I reduced the ironing flow to 1% (and later to 0%) on my next tries, which led to the filament getting stuck after the ironing was done.
I printed with a .8 Volcano nozzle, so there is probably more heat degrading the filament while the ironing happens, although the ironing probably only took 2min max.
Has anyone played around with this feature and maybe found a happy medium between cooking the filament because there is no flow and grinding it down because there is too much flow?
I don't think 10% was too much. Did it look messy like over extrusion? I've found that ironing at low flows will cook and clog. It needs to be pushing a decent rate. You can also increase the movement speed to keep the filament speed high enough to not cook and clog.
Cura also has a plugin to change options at Z height. Perhaps you could reduce the temp a few degrees for the ironing layer and bump it back up after.
sungod3k last edited by sungod3k
With 10% it still looked good but there was some material pushed to the sides which also looked almost burned. The extruder started clicking right away, so 10% was definitely too much.
With 0% the quality of the ironed surface looked pretty much that same. My top surfaces usually dont have gaps so pushing more material in there doesn't seem necessary.
Speeding the ironing moves up sounds like a good idea.
and a big retract to empty the nozzle a bit. i thought about doing that with the z height plug in, but it seems too cumbersome to have to do that all the time.