Are there quantitive means of measuring nozzle wear? What steps do you perform to measure this, if so?

I have some digital callipers, but don't have much confidence in measurements taken, as it's almost impossible to ensure the nozzle aperture is completely free of filament residue.

The context here is I've recently been trying out some carbon-fibre infused PLA filament, but would like to keep an eye on how much it wears the nozzle, and get an idea of nozzle wear rates. I can then work out if the mechanical and aesthetic qualities of the CF filament are worthwhile.

  • $\begingroup$ Why are people so fixated on does anybody?! please, formulate it in a way that is not I am poking with a stick at the anthill $\endgroup$
    – Trish
    Dec 26 '20 at 14:07
  • $\begingroup$ Are you interested in evidence of nozzle wear? Then look at the Olsson Ruby site, they made a quantitative test on PC filament. Are you interested in scientific papers? There are non. are you into methods of measuring wear? or signs of nozzle wear in prints? $\endgroup$
    – Trish
    Dec 26 '20 at 14:40
  • $\begingroup$ Do you have a microscope which you can use to take images? Also, you would probably want to examine the nozzle in situ rather than remove it every time. $\endgroup$ Dec 26 '20 at 16:26
  • $\begingroup$ Again, what do you look for? A grind-up curve? An estimation how long your nozzles survive? Olsson-Ruby did a test and it a brass nozzle survives about 0.5 kg of Carbonfiber. $\endgroup$
    – Trish
    Dec 26 '20 at 23:01
  • $\begingroup$ examle: 3dprinting.stackexchange.com/a/10886/8884 references the olsson-ruby picture. $\endgroup$
    – Trish
    Dec 26 '20 at 23:06

Based on CNC Kitchen measurements,

the wear can be initially estimated by judging the overall length of the nozzle. Abrasive particles wear the nozzle very little on the channel (so the diameter doesn't change, for a while) but they wear out the outer surface in contact with the printed part, resulting in a shortening.

Of course, once the shortening gets severe, the diameter will increase because you reach the inner chamber.

  • $\begingroup$ And Olsson ruby got some numbers on that on their pare $\endgroup$
    – Trish
    Mar 1 '21 at 11:06
  • $\begingroup$ @Trish I noticed after writing the answer that both 0scar and I already replied to a sister question: 3dprinting.stackexchange.com/a/10886/8884 $\endgroup$
    – FarO
    Mar 1 '21 at 11:55

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