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Strings more visible over time  

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Felix
(@felix)
Eminent Member
Strings more visible over time

Hello! First of all, i'm so happy and pleasured with my Prusa MK3.

I did a benchy and torture test as first prints, no trouble, printed very good. Now when I prints more parts to make a IKEA enclosure I clearly see a pattern, those strings are more and more visible over time.

I have checked all nuts, screws and stability of my table. Even printed it at floor but those strings won't disappear. May you help me? I also checked the troubleshooting guide I found.

First print of IKEA enclosure parts. Seems ok!

Same part as first.

Second part printed, you now see those strings.

The third and last before I'm asking you at the forum. The strings are more spread over all the part.

You can also see the marks from the nozzle, is it too close to bed?

Prusa MK3S MMU2S

Publié : 19/01/2019 3:11 pm
Bunny Science
(@bunny-science)
Noble Member
Re: Strings more visible over time

The irregular lines suggest extruder is having trouble.

1. Open extruder cover and check idler axel pin is engaging both sides of mount rather than just one mount. Pin should be recessed relative to both sides.

2. Adjust extruder tension (with filament out) to about 1 turn tighter than where springs start tensioning.

Publié : 19/01/2019 7:08 pm
Felix
(@felix)
Eminent Member
Topic starter answered:
Re: Strings more visible over time


The irregular lines suggest extruder is having trouble.

1. Open extruder cover and check idler axel pin is engaging both sides of mount rather than just one mount. Pin should be recessed relative to both sides.

2. Adjust extruder tension (with filament out) to about 1 turn tighter than where springs start tensioning.

Now its prints very smooth first layer again!!

I will wait 3 hours to see if those irregular lines disappeared.

Prusa MK3S MMU2S

Publié : 20/01/2019 4:22 pm
Felix
(@felix)
Eminent Member
Topic starter answered:
Re: Strings more visible over time

how often does those tension screws need to rechecked?

Prusa MK3S MMU2S

Publié : 20/01/2019 5:56 pm
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