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montreuilg
(@montreuilg)
Active Member
Nozzle wear

Good morning everyone,

What are the signs of a worn nozzle? How do you know when to change it?

_
gabriel

Posted : 26/12/2016 4:27 pm
david.b14
(@david-b14)
Honorable Member
Re: Nozzle wear

If you are only printing PLA then it should not be an issue. If you switch to abrasive filaments like carbon fiber / metal it can destroy the brass nozzle after just one print.

Posted : 26/12/2016 4:45 pm
montreuilg
(@montreuilg)
Active Member
Topic starter answered:
Re: Nozzle wear

The question remains... 😉 😎

Posted : 26/12/2016 5:56 pm
simon.p
(@simon-p)
Trusted Member
Re: Nozzle wear

If you are only printing PLA then it should not be an issue. If you switch to abrasive filaments like carbon fiber / metal it can destroy the brass nozzle after just one print.

Well, true but it does not answer any of the two questions in the post.

Posted : 26/12/2016 6:05 pm
david.b14
(@david-b14)
Honorable Member
Re: Nozzle wear

I have not had one wear out yet, but from what I read on the 3D groups you will not be able to print in fine detail. I think because the nozzle hole is an uniform circle.

Maybe a test is to print a single line circle? Was the first line uniform? If the nozzle wears out and the opening is no longer a circle, parts of the 1st layer would be fatter, but I am just guessing.

For example, once the nozzle is worn, I bet you would not be able to print this moving part:
http://www.thingiverse.com/thing:913675

Posted : 26/12/2016 9:52 pm
montreuilg
(@montreuilg)
Active Member
Topic starter answered:
Re: Nozzle wear

Thanks David,

So you are saying precision will be lost, and I would tend to agree especially if the nozzle tip geometry is severely affected.

I found this document, with nice clear pictures of worn nozzles and explanations:

http://e3d-online.com/is-carbon-killing-your-nozzle

_
gabriel

Posted : 27/12/2016 11:59 am
david.b14
(@david-b14)
Honorable Member
Re: Nozzle wear

Thanks for the link, it was very informative and makes sense.

Posted : 27/12/2016 5:47 pm
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