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Stringing test fail  

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Richy73
(@richy73)
Active Member
Stringing test fail

My stringing test (you know the one with the two cylinders) it had a lot of stringing and i don't know how to fix it. I tried to change the retraction speed and it did not help.  

Veröffentlicht : 02/01/2022 8:33 pm
Martin
(@martin-16)
Eminent Member
RE: Stringing test fail

What filament material you are printing and at which temperature?

Veröffentlicht : 02/01/2022 8:47 pm
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE:

Inland pla + at 225 c for nozzle and 75 c for bildplate. It's brand new

Diese r Beitrag wurde geändert Vor 3 years 2 mal von Richy73
Veröffentlicht : 02/01/2022 9:42 pm
Diem
 Diem
(@diem)
Illustrious Member

Have you tried drying the filament?

Cheerio,

Veröffentlicht : 03/01/2022 12:16 am
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

Yes i have 

Veröffentlicht : 03/01/2022 12:26 am
Diem
 Diem
(@diem)
Illustrious Member

225 is rather hot for PLA.  Prusa defaults are 210, also hot, many PLA's will print OK below 190 degrees.  Try dropping the temperature by stages and observe the results.

Cheerio,

Veröffentlicht : 03/01/2022 4:56 am
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE:

Ok but it's pla +

Veröffentlicht : 03/01/2022 3:53 pm
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

I went down to 206 for nozzle

Veröffentlicht : 03/01/2022 5:30 pm
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

I went down to 206 for nozzle. It did not help at all

 

Veröffentlicht : 03/01/2022 5:31 pm
Martin
(@martin-16)
Eminent Member
RE: Stringing test fail

Can you please post an image?

Veröffentlicht : 03/01/2022 6:22 pm
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

This is the 206

Veröffentlicht : 03/01/2022 7:57 pm
Martin
(@martin-16)
Eminent Member
RE: Stringing test fail

Well, this picture shows more the wall behind your stringing test sample 😉

How exactly you have dried the filament? I would recommend put the spool in the oven at 60° for at least 6 hours. Open the door of the oven from time to time that the moisture can escape.

Then do a test print with the Prusament PLA profile in PrusaSlicer.

Veröffentlicht : 03/01/2022 8:44 pm
Richy73 gefällt das
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE:

60 c or 60 f

I'm going to go with 60 c

Veröffentlicht : 03/01/2022 9:01 pm
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

My oven doesn't go that low

76 is the lowest it can go 

Veröffentlicht : 03/01/2022 9:07 pm
Martin
(@martin-16)
Eminent Member
RE:

Sorry for being unprecise: I meant 60°C (which is 140°F). If 76°C is probably to hot and there is a risk that the filament on the spool will melt together. Another alternative is using a fruit dehydrator or a filament drybox (i'm using the one from esun)

Veröffentlicht : 04/01/2022 7:25 am
Gargs454 gefällt das
Diem
 Diem
(@diem)
Illustrious Member

By and large food dehydrators are better than filament dryboxes for the actual drying stage. 

I use:

https://www.amazon.co.uk/HOMCOM-Dehydrator-Adjustable-Temperature-Control/dp/B01N8OWBLQ/ref=sr_1_5?crid=YLPBZLC5NVD8&keywords=dehydrator&qid=1636119085&sprefix=dehy%2Caps%2C73&sr=8-5

I didn't do much research - just picked one that used up the remaining credit on a gift-card.

You can either snip out the bottom of a couple of trays to make room for a filament roll or do what I did and print a tall spacer.  A translucent PETG spacer has worked OK for me so far...

Spacer files:

dryerinsert for Mini, print 3 and glue together

dryerinsert1 for i3, print 2 and glue together

Cheerio,

Veröffentlicht : 04/01/2022 10:31 am
Gargs454 gefällt das
Martin
(@martin-16)
Eminent Member
RE: Stringing test fail
Posted by: @diem

By and large food dehydrators are better than filament dryboxes for the actual drying stage. 

Completely agree! The dry box is taking care that the filament is not getting wet during the print, but really to dry a wet filament in a dry box may takes quiet a long time...

Another side note: Also take care to store your filament in a closed zip bag and put some silika-gel inside. I use some vaccum zip bags. A dry filament is definitive key to achieve good results although PLA is less hygroscopic like other materials (TPU, Nylon, PETG...)

Veröffentlicht : 04/01/2022 10:55 am
Gargs454 gefällt das
Richy73
(@richy73)
Active Member
Themenstarter answered:
RE: Stringing test fail

Ok thanks for the advice.

Veröffentlicht : 04/01/2022 2:13 pm
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