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Repeatable (bad) print quality issues  

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Neil Ramsay
(@neil-ramsay)
Eminent Member
Repeatable (bad) print quality issues

I'm printing with the Prusa-supplied filament (silver PLA) that came in the box, using the files on the supplied SD card.

I printed the Prusa logo 3 times (at slightly different Z adjustments). Always, the P looks okay. The U looks kind of okay. And the other letters look AWFUL.

I then tried printing the frog (150um height version), and one side of the frog looks... okay. One side looks ghastly. What can I look at to try and debug this. One would expect, if it's underextruding, that it would be uniformly bad vs one side looking okay. But I don't know. Could the temperature be too low? Or the heat dissipating too quickly to keep the filament malleable?

Publié : 01/08/2018 8:34 pm
Rosparovac
(@rosparovac)
Estimable Member
Re: Repeatable (bad) print quality issues

Do you have tighten you X / Y belt corectly?

It looks like looseness in printers had.

But first, dou check printer folowed by this video tutirial?

University: MK2S upgraded to MK3 with MMU2.0
Home: MK3
Materials: ABS; ASA; PETG; PET; PLA; Nylon; Nylon Carbon; CPE;
SW: Freecad 0.18; Slicer PE And still generating more troubles than whole forum together.

Publié : 01/08/2018 10:21 pm
Neil Ramsay
(@neil-ramsay)
Eminent Member
Topic starter answered:
Re: Repeatable (bad) print quality issues


Do you have tighten you X / Y belt corectly?

It looks like looseness in printers had.

But first, dou check printer folowed by this video tutirial?

Tension SEEMS okay. No slippage I can find. Everything calibrates properly. Went through the video tutorial post construction.

Publié : 01/08/2018 10:31 pm
Rosparovac
(@rosparovac)
Estimable Member
Re: Repeatable (bad) print quality issues

This one: [youtube] [/youtube]

University: MK2S upgraded to MK3 with MMU2.0
Home: MK3
Materials: ABS; ASA; PETG; PET; PLA; Nylon; Nylon Carbon; CPE;
SW: Freecad 0.18; Slicer PE And still generating more troubles than whole forum together.

Publié : 01/08/2018 10:44 pm
Neil Ramsay
(@neil-ramsay)
Eminent Member
Topic starter answered:
Re: Repeatable (bad) print quality issues


This one: [youtube] [/youtube]

Yes. I've watched that video and done the adjustments required.

I'm not sure, if filament was not feeding properly, that the errors would be in the same place all the time. It seems like random errors would cause random issues with the prints vs a repeatably bad quality.

Publié : 01/08/2018 11:28 pm
Neil Ramsay
(@neil-ramsay)
Eminent Member
Topic starter answered:
Re: Repeatable (bad) print quality issues

All right. I've fixed the weirdness, it seems. It's not perfect, but everything else is just tweaking.

The culprit? What else. A set screw. The set screw on the X axis motor was slipping because of a poorly shaped cup. I replaced it with another hardened set screw I had, tightened it up, and it solved all sorts of weird print issues.

Publié : 02/08/2018 10:06 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Repeatable (bad) print quality issues

excellent news.

try reducing the flow a little and the top of the prusa logo should improve

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

Publié : 02/08/2018 10:26 pm
Neil Ramsay
(@neil-ramsay)
Eminent Member
Topic starter answered:
Re: Repeatable (bad) print quality issues


excellent news.

try reducing the flow a little and the top of the prusa logo should improve

regards Joan

Thanks, Joan!

Publié : 02/08/2018 11:16 pm
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