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Underextrusion and nozzle clogs  

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timo.m
(@timo-m)
Estimable Member
RE: Underextrusion and nozzle clogs

Well no wonder it was rather hard to diagnose then with wrong/defect replacement parts in the mix. 

Bold move complaining about Prusa customer service for not antizipating that...

 

Have fun printing!

Napsal : 14/07/2019 8:31 pm
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(@)
Illustrious Member
RE: Underextrusion and nozzle clogs

It's a PhD thing... not the first time I've experienced the same attitude with pieces of paper.  

Napsal : 14/07/2019 8:48 pm
timo.m se líbí
gorillamotors
(@gorillamotors)
Trusted Member
Topic starter answered:
RE: Underextrusion and nozzle clogs
Posted by: timo.m

Bold move complaining about Prusa customer service for not antizipating that...

 

Have fun printing!

I was not complaining to them but asking for assistance.

Napsal : 14/07/2019 9:07 pm
gorillamotors
(@gorillamotors)
Trusted Member
Topic starter answered:
RE: Underextrusion and nozzle clogs
Posted by: Tim

It's a PhD thing... not the first time I've experienced the same attitude with pieces of paper.  

You are an ASS

Napsal : 14/07/2019 9:08 pm
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(@)
Illustrious Member
RE: Underextrusion and nozzle clogs

Not sure that's a complement or an insult. Most of the PhD candidates (and post-docs) I've lectured to call me Brutal.

This post was modified před 5 years by --
Napsal : 14/07/2019 10:04 pm
bobstro
(@bobstro)
Illustrious Member
RE: Underextrusion and nozzle clogs
Posted by: jim.h9

[...] This made the temps read 15-25C hotter than they actually were.

So dodging all the mines here... That explains why PLA worked and PETG didn't I suppose. Unlike most of the issues we're seeing this time of year, yours was truly under-temp. Sounds like your PLA was OK at lower temps but the PETG needed more. Just out of curiosity, what temp were you setting for PLA? Prusa's profiles tend to run hot.

The reason I'm asking is this sounds like a useful diagnostic, especially if someone doesn't have diagnostic equipment available.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Napsal : 15/07/2019 1:24 am
gorillamotors
(@gorillamotors)
Trusted Member
Topic starter answered:
RE: Underextrusion and nozzle clogs
Posted by: bobstro
Posted by: jim.h9

[...] This made the temps read 15-25C hotter than they actually were.

So dodging all the mines here... That explains why PLA worked and PETG didn't I suppose. Unlike most of the issues we're seeing this time of year, yours was truly under-temp. Sounds like your PLA was OK at lower temps but the PETG needed more. Just out of curiosity, what temp were you setting for PLA? Prusa's profiles tend to run hot.

The reason I'm asking is this sounds like a useful diagnostic, especially if someone doesn't have diagnostic equipment available.

PLA 210/60 PETG 245/85 Resistance for the thermistor is around 100K

Napsal : 15/07/2019 2:13 am
bobstro
(@bobstro)
Illustrious Member
RE: Underextrusion and nozzle clogs
Posted by: jim.h9

PLA 210/60 PETG 245/85 Resistance for the thermistor is around 100K

Results make sense. I don't have much luck with PETG at the cold end. 240C gives the best inter-layer adhesion. I haven't done much temp calibration other than the on-board routines, instead just focusing on finding what works best for each filament with the settings I've got.

At least now if you have stringing problems, you know you can print that PLA a good bit cooler!

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Napsal : 15/07/2019 2:28 am
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