0.6mm nozzle, bad quality, what is the root cause?
I have owned a Prusa i3 MK3s for few months now and since most of my prints tend to be large and useful, I wanted to speed up the prints a bit.
So I swithed to a 0.6mm nozzle instead of the default 0.4mm. During the same time I change PrusaSlicer to 2.5-rc/alpha/release whatever have the new arachne engine. And since the switch, my prints have looked like this:
Material is PETG. Print settings are 0.4mm DRAFT. And I usually see there three types of symptoms
- Certain spot, on many layers, looks like few millimeters of line is missing. Where did it disappear? Why is this happening on exact same spot on many layers?
- Spikes of material pointing out. These are not part of the model.
- Small blobs on random places.
Can someone help me to find root cause for these? Is it all caused my 0.6mm nozzle? Or new 2.5 Prusasclicer? Or PETG stored badly?
RE: 0.6mm nozzle, bad quality, what is the root cause?
Image disappeared somewhere. I'll try to re-attach it here.
RE: 0.6mm nozzle, bad quality, what is the root cause?
if you are using the 0.6mm nozzle with the 0.4mm profile, you are probably under extruding
go to 'Configuration>Configuration wizard, and add the 0.6mm nozzle profiles,
re slice your model with the 0.6 profile, in Prusa slicer
Load your SD Card into your printer,
reset the printer to expect a 0.6mm nozzle
if your model has a flat bottom, start a print, and adjust your live Z to get a good first layer
if the first layer is good, let the print continue,
If the first layer is poor, stop the print, remove the rubbish, and retry the first layer again.
rinse and repeat until you get a good first layer
then let the print continue to completion
regards joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: 0.6mm nozzle, bad quality, what is the root cause?
I don't believe this is first layer problem.
Attached is a 25mm x 25mm x 0.2mm test square. I think the layer look just fine.
RE: 0.6mm nozzle, bad quality, what is the root cause?
Here is another sample.
You see the random blobs start to appear at much higher layers.
I doubt it's the underying cause but dampness is compounding your print errors. Dry your filament and show us what issues remain.
Cheerio,
RE: 0.6mm nozzle, bad quality, what is the root cause?
I don't believe this is first layer problem.
Attached is a 25mm x 25mm x 0.2mm test square. I think the layer look just fine.
True.
If at first you don't succeed, skydiving is not for you.
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RE:
Also, I believe you have the correct profile and nozzle size selected, that‘s not it either.
Before you start changing settings like retraction etc. you should rule out damp filament and leaking hotend as probable causes… Not uncommon after a nozzle change.
If at first you don't succeed, skydiving is not for you.
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RE: 0.6mm nozzle, bad quality, what is the root cause?
What layer height are you using? I had a very similar issue with 0,4 mm nozzle and using a too thin layer height. If you use 0,6mm nozzle then ideal height should be 0,3mm.
On the third picture you can also see that the outer perimeter is not consistent. The overall look of the surface is not smooth.