Stringing issue with ColorFabb PLA Semi-matt white
 
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Stringing issue with ColorFabb PLA Semi-matt white  

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LopCot
(@lopcot)
Trusted Member
Stringing issue with ColorFabb PLA Semi-matt white

I really love this material (ColorFabb PLA semi-matte white) but i'm having stringing issues.

Prusaslider has a specific profile for this filament (ColorFabb PLA-PHA), but it doesn't work well.

I did 5 stringing tests, changing the hot-end temperature and some changes in retraction parameter

From left to right (see picture)

Printing at 0.15 (detail)

1) Default ColorFabb PLA-PHA profile - temperature 215-215 - retraction 3.2 (default)
2) temperature 215-195 - retraction 3.2
3) temperature 215-190 - retraction 3.2
4) temperature 215-190 - retraction 4.2
5) temperature 215-190 - retraction 6.0

Lowering temperature produces better printing results (ColorFabb say min195-max220), while increasing retraction affects less.

I specify that i have no particular problems with other filaments (with Prusament no stringing at all, or very minimal).

I have some questions:

1) How far can I safely increase the retraction value?
2) Do you have any suggestions on additional changes to make in this case?
3) Could it be a problem caused by too wet filament?

Could it make sense to buy a filament dryer?

Respondido : 15/11/2021 9:38 pm
sylviatrilling
(@sylviatrilling)
Honorable Member
RE: Stringing issue with ColorFabb PLA Semi-matt white

I have had good results taming stringing with Bobstro's settings: 

Retraction length is set to 0.2mm

Lift Z is set to 0mm

Retraction speed is set to 50mm/s

Deretraction speed is set to 25mm/s

Lift Z is a major cause of stringing but setting it to 0 can cause other issues depending on the model but it usually works for me.

I print mainly in white, although I use a different brand. I found 220 temp works best. White filaments have a lot of pigment and often print better at a slightly higher temperature. 

Mk3S+,SL1S

Respondido : 15/11/2021 10:14 pm
LopCot
(@lopcot)
Trusted Member
Topic starter answered:
RE: Stringing issue with ColorFabb PLA Semi-matt white

Thanks for your reply.

With your settings i get the worst scenario. I guess that the hot-end temperature is too high, but also with retraction length set to 0.2 i have troubles just when start printing (as you can see in picture)

 

Respondido : 16/11/2021 1:26 pm
sylviatrilling
(@sylviatrilling)
Honorable Member
RE: Stringing issue with ColorFabb PLA Semi-matt white

It could be wet filament, then.

Mk3S+,SL1S

Respondido : 16/11/2021 2:27 pm
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