print support  

RE: print support

Yes, the defaults are super aggressive. I understand that the devs are focusing on supports as one of the main area for the next version of PrusaSlicer. 
In the meantime, I found these settings to be a lot better than the stock settings:

0.25mm z distance 

3mm pattern spacing
4 interface layers
75% xy distance
0.2mm interface layer spacing

RE: print support

Firstly I'm guessing you are using the defaults.  Don't.  The contact z on the defaults is too small.   In general use you need to set your contact z distance to a minimum of 0.2.  Anything less and they will pretty much weld themselves together.  Thats with PLA.  With petg you need more.  Many use 0.25 as their default distance.

Secondly the supports 'grow' outwards quite aggressively.  At the moment theres little you can do except use very careful placement of support enforcers (either modifiers or painting on) to set the area.  There are various threads in the Prusa Slicer section of the forum (way down the bottom in case you havent spotted it) on supports and their foibles.  
As the search function on the forum sucks let me help with this "site: https://forum.prusa3d.com/ support" which when put into google comes up with all sorts of helpful posts.

The next upcoming release of PS 2.4 is supposed to be addressing many of the support issues.  We wont know what and how well until it is released.  Things might change after that.

RE: print support

@fuchsr

Thanks so much! Will give it a try

RE: print support

@neophyl

Thanks so much!

Print support

I tried using these settings and a lot of my smaller object prints are failing. Any ideas???

Posted by: @medic57

I tried using these settings and a lot of my smaller object prints are failing. Any ideas???

You may want to revert back some of the settings to the defaults and see if that makes a difference. The key is to change the z distance to at least 0.2. 

Actually... I just realized you said some of your  smaller objects fail. So I'm wondering if you're printing with a nozzle smaller than the default 0.4 mm and/or very small (less than o.1) layer height.  In which case I would bring that z distance down to 1.5 or so. 

Print support

no it's a 0.4mm nozzle. Were you able to see the picture I posted in my comments? How the axle failed.

print support

RE: print support

@medic57

There is no one size fits all solution for supports, for example, if you are printing with ABS 0.1 is the great setting for support separation, 0.15 or 0.2 might be good for PETG, depending. it is completely specific to the model shape, printing orientation, material you are using and even cooling. the default supports in prusa slicer are simply a place to start and not intended to work as a one size fits all solution. More over the settings that you receive from other users, unless specifically tailored to your print are most of the time going to be no better then the default prusa parameters. when looking for assistance in this area it is best to provide (if possible) a Zipped up .3mf (project file) as many of the folks here have a reasonable understanding of this and can offer more valuable and specific help, when they are able to see the model, its orientation and material type.

Regards

Swiss_Cheese