PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)
 
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PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)  

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raew
 raew
(@raew)
Eminent Member
PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

Now I was aware that the support structures of PrusaSlicer are not ideal, to put it mildly. But this time I wasn't able to remove all the thin-line remnants from the sheet. I tried to bend the build plate, tried a PETG scraper, tried with Isopropyl alcohol (100%) - eventually the only way to get those finicky little details off the bed was to use my finger nails for some 10-20 minutes. I never had a problem with removing parts from the build plate before, bed was cooled to room temperature, z distance was properly adjusted, but now the brand new satin sheet is ruined after having served for only 3 prints.

So here's the warning: If you need supports for a print, use CURA for slicing. Full stop! PrusaSlicer support structures are sub-par by every possible angle and view. I have learned my lesson and will now switch to the back of the sheet, but PrusaSlicer won't be my tool of choice anymore as soon as support structures are necessary!

Posted : 22/12/2021 10:49 pm
gkas
 gkas
(@gkas)
Estimable Member
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

It sounds like the first layer was squished into the bed.

Posted : 22/12/2021 11:52 pm
raew
 raew
(@raew)
Eminent Member
Topic starter answered:
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

If the first layer would have been squished into the bed, why went half of the supports without problems? Why do Cura-generated support never pose a problem? If I raise z distance even further, I'm coming close to the filament not sticking to the bed. Even in the early days, when I had z distance set a bit too high, I had to manually peel off many of those support lines individually.

To me the problem is the structure of those supports. Could of course be solely me, but Rafts also work better in Cura (for me, that is).

Anyway, thanks for the hint - I'll check 1st layer calibration again. Venting here helped a lot as well ...

Posted : 23/12/2021 1:14 am
Swiss_Cheese
(@swiss_cheese)
Noble Member
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

@raew

 

It's you. figure it out. thousands of people before you have, and people here try to help. perhaps this just isn't your forte, and you should find another hobby. Or listen to the advice of those before you, and humble yourself, since you clearly are lacking in knowledge.

The Filament Whisperer

Posted : 23/12/2021 4:25 am
raew
 raew
(@raew)
Eminent Member
Topic starter answered:
RE:

 

Posted by: @swiss_cheese

@raew

 

It's you. figure it out. thousands of people before you have, and people here try to help. perhaps this just isn't your forte, and you should find another hobby. Or listen to the advice of those before you, and humble yourself, since you clearly are lacking in knowledge.

Fine, Mr Know-it-all - how about answering my questions then? Why do the problems exist with PrusaSlicer, but not with Cura? Why did half of the supports go without problems? Why did the problem already occur in the past with a slightly too-high z distance?

I’m not claiming to be able to ever reach your levels of knowledge, but I sure recognize a logic issue: If a problem exists and is gone with only variable (the slicer) changed, Occam’s razor does not favor the constants as primary source of problems.

This post was modified 2 years ago by raew
Posted : 23/12/2021 9:29 am
gkas
 gkas
(@gkas)
Estimable Member
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

So why are you using PrusaSlicer instead of Cura?

Posted : 23/12/2021 9:32 am
raew
 raew
(@raew)
Eminent Member
Topic starter answered:
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

My impression is that the Prusa printer profiles in PrusaSlicer are more fine-tuned than the ones for Cura - which is expected, as it is the "official" tool and Prusa probably has more options to implement certain functionalities. And a couple of usability functions I do prefer in PrusaSlicer over Cura (with others it is vice versa). I have yet to try SuperSlicer, which is said to fix some of the issues that are present in the normal Slic3r as basis for PrusaSlicer.

I'm fully aware that there probably is no single ideal solution, but a choice of the right tool for a specific task. I had printed so many hours without the need for supports that I had forgotten about the problematic support implementation in PrusaSlicer and was reminded now again, hence I came here to vent. Didn't expect condescending talk, but I guess that's the new normal nowadays.

Posted : 23/12/2021 5:11 pm
jsw
 jsw
(@jsw)
Famed Member
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

Did you use a release agent?

Posted : 24/12/2021 9:35 pm
mark
 mark
(@mark-3)
Reputable Member
Release agent and new Prusa Slicer
Posted by: @jsw

Did you use a release agent?

The combination of using Elmer's Glue stick and blue Windex as a release agent,  and the new "snug" supports in Prusa Slicer 2.4.0 worked well for me. The supports look somewhat ratty, but they separate from the object and the bed easily. The printed object looked as good or better on the supported surfaces compared to the previous supports. Flat surfaces looked pretty good. Curved ones still needed some touch up with some sandpaper to smooth them out.

Regards,

Mark

Posted : 27/12/2021 4:29 am
raew
 raew
(@raew)
Eminent Member
Topic starter answered:
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

@jsw: No release agent. Figured it's not needed on Satin for PLA/PETG.

@mark: I do agree - support structures are nicely improved in 2.4.0. Even more impressive (to me) is that 2.4.0 pegs all CPU cores to the max during slicing (can't remember 2.3.3 doing that) - this is a tremendous improvement imho (and one more reason to prefer PrusaSlicer over e.g. Cura 😉 )! 

Posted : 31/12/2021 12:26 am
jsw
 jsw
(@jsw)
Famed Member
RE: PrusaSlicer + supports + PETG = ruined Satin sheet (DON'T use PrusaSlicer for supports!)

I have not used the satin plate, but I have used the textured plate for PLA prints with supports, and I would definitely recommend something like the glue stick or Layerneer both as an adhesion booster and release agent.

On the textured plate, small support footings can indeed be difficult to remove from the build surface and a release agent sure helps.

Posted : 31/12/2021 12:32 am
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