suppose you would like to print a 90' pipe fitting....
OK, it would be open on both ends. It would need external support on the 90' portion but no fill and no internal supports. How would you setup PrusaSlicer to do this?
I keep getting supports on the inside when I try. What I am printing (similar to a 90' elbow but is a section of wing)
https://photos.app.goo.gl/fVJoTxzcrU55scJG8
(can't get the insert photo thing to work)
RE: suppose you would like to print a 90' pipe fitting....
Hi Keshka,
there are many ways to address this, I would probably do something like this
because the lower edge is so narrow, the support is minimal, so I have added a Raft, to improve Adhesion.
I have attached a Zipped .3mf file, for you to play with
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: suppose you would like to print a 90' pipe fitting....
Thank you Joan;
I thought we had solved the problem....but one dies and a second pops up.
I had noticed when sliced this setup the sliced version had holes in it. Figured was just a graphics error until my print looks like the slice. What the hec I never asked for that one!
https://photos.app.goo.gl/ou9DFBRarvoVKJ7u9
https://photos.app.goo.gl/j7NZjrTdetVteLjq8
and last ....how the stl looks with my support enforcers
RE: suppose you would like to print a 90' pipe fitting....
ps....teach me how to put photos in plz! When I click on the insert pic icon it askes for "source" but does not like links to google photos
RE: suppose you would like to print a 90' pipe fitting....
@keshka-007
Get a local copy of the picture and use "Add Media" button to upload and insert the photo into the reply.
Have a look at my models on Printables.com 😉
RE: suppose you would like to print a 90' pipe fitting....
@keshka-007
Hi Keshka,
I open a reduced size File manager window over the browser window then drag a file from File Manager, into the Forum text input box, and when the image gets near to the bottom of the Text input window, the screen colour changes (to Blue on my computer), at that moment, I drop the picture file into the text input window, and 
As if by magic, a window like the picture above appears... if you select 'Link to:' Media File, then click 'insert into Post' button
Your picture will be pasted into the post.
and because the image is linked tot he Media file, the inserted picture will enlarge when you click on the image...
Hopefully one of the two methods will work for you!
Could you please make a Zip copy of your STL and attach that as a file to the post so that we can have a play with it, it may help us give a better answer.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: suppose you would like to print a 90' pipe fitting....
@joantabb
will do joan;
as to photos....apparently I suck "Sorry, you are not allowed to upload files.".....what ever the heck that means.....prob can't upload zip either.
fine....google drive shared link: https://drive.google.com/open?id=1vRHpqXEZ0tFu4iOQK0b59slDB96Bk0xf
(thanks all for help!)
Keshka
RE: suppose you would like to print a 90' pipe fitting....
Hi Keshka,
I need permission to see that file, a request has been sent
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: suppose you would like to print a 90' pipe fitting....
...pesky google....here, THIS one is supposed to be public
https://drive.google.com/file/d/1vRHpqXEZ0tFu4iOQK0b59slDB96Bk0xf/view?usp=sharing
RE: suppose you would like to print a 90' pipe fitting....
Thank You Keshka,
I got that file
I have had a play with the model and the main problem is that the skin is very thin
Are you trying to print it with a 0.4mm nozzle? I suspect a smaller nozzle would make the part skin too thin
I have modified the settings for XY compensation from 0.0mm to 0.09mm (just enough to give a complete skin) (If you can handle thicker skin, you might choose to increase the setting a little... 
in my example
item A, and Item C have had Support enforcers added, to increase the minimal supports that the slicer automatically added (similar effect could probably have been achieved by modifying the support Overhang Threshold, in Prusa Slicer )
Item B has had a Support Blocker added to prevent supports inside the model
the parts above will generate support, but they are quite large parts and the adhesion for the supports may be inadequate so I have allocated a three layer raft to give additional adhesion.
you can have a play with them and decide which suits your needs most
Item B is likely to be easiest to clean up, the layer lines will be close to airflow direction but the strength of the part will be dependent upon the inter layer Bond strength,
Items A, C & D have varying degrees of cleanup. but are likelu to be more robust because the strength will come fron filament torsion rather than bond strength, the layer lines will be across the airflow, I don't know if this will give problems,
Currently the print is setup, based on the Generic PLA profile, with 0.10 mm layer height, 70C bed temperature and 0.4mm retraction, you may want to increase the layer height to improve strength at the expense of surface smoothness. and you may have other preferences
Below is a .3mf Project file (In a Zip Folder) if you unzip this you should be able to Open, the project file with Prusa Slicer
Back Wing Tip L with support
After you have played with the enclosed file, you can remove the three items that you don't want, and re centre the remaining item,
I hope this helps you,
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: suppose you would like to print a 90' pipe fitting....
@joantabb
Thank you so much Joan! I will start another print today and see how things go.
Keshka
RE: suppose you would like to print a 90' pipe fitting....
Good luck,
which model alignment did you decide to go with?
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: suppose you would like to print a 90' pipe fitting....
Joan;
if you put Original Prusa.....in the lower right corner of a top down view. I used the one in the top left (leading edge of the wing facing down). I started the print this morning but had to stop it as I had to leave home....I will print again in the morning
RE: suppose you would like to print a 90' pipe fitting....
The gremlins conspired against me. After the 7hr print was 3/4 done the power went out. Ugh! I started it again and "things" worked as should. Thanks to your settings and help Joan, I managed a quality print! Thank you so much, I still don't understand many of the settings and the results they might produce but I am learning.
Here are photos, I hope I got the sharing correct
https://photos.app.goo.gl/UGfCcDnegvU4Nkk86
NOTE! The picture in the center is from several tries back were the part was orientated with the open end of the wing tip down against the bed. Note the nasty spaghetti as the curvature gets closer to horizontal (there was a big solid support under that area that broke several previous tries - it would not release)
Keshka