Intersection of 2 protrusions [SOLVED]
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Intersection of 2 protrusions [SOLVED]
Hello,
I'm using FreeCAD 0.18 on Linux.
I made a sketch in the plan XY and protrusion in the direction Z
I made a sketch in the plan XZ and protrusion in the direction Y (see the screen capture)
The 2 sketches are working fine (no error).
The 2 protrusions are fine too.
When I make a boolean intersection of these two parts,
there is no error,
but the result called "common" is empty.
Please is it a known bug or I am I doing something wrong ?
I'm using FreeCAD 0.18 on Linux.
I made a sketch in the plan XY and protrusion in the direction Z
I made a sketch in the plan XZ and protrusion in the direction Y (see the screen capture)
The 2 sketches are working fine (no error).
The 2 protrusions are fine too.
When I make a boolean intersection of these two parts,
there is no error,
but the result called "common" is empty.
Please is it a known bug or I am I doing something wrong ?
- Attachments
-
- FreeCADcommon.png (146.38 KiB) Viewed 1885 times
Last edited by chesss on Thu May 28, 2020 7:08 pm, edited 2 times in total.
- microelly2
- Veteran
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Re: Intersection of 2 protrusions that should not be empty
Welcome to the forum.
Can you upload the file?
Sometimes there are errors if the parts have faces in the same plane.
Maybe this is the reason.
Can you upload the file?
Sometimes there are errors if the parts have faces in the same plane.
Maybe this is the reason.
Re: Intersection of 2 protrusions that should not be empty
Hi, Welcome
As @microelly2 said, I think there are coplanar faces between the 2 solids. This is known to lead to errors in boolean operations.
As @microelly2 said, I think there are coplanar faces between the 2 solids. This is known to lead to errors in boolean operations.
Re: Intersection of 2 protrusions that should not be empty
Thank you very much for your help.
I didn't find any coplanar faces.
I uploaded the file.
I didn't find any coplanar faces.
I uploaded the file.
- Attachments
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- FrontBase0.FCStd
- Protrusion intersection error
- (20.72 KiB) Downloaded 67 times
Re: Intersection of 2 protrusions that should not be empty
Just forcing a full recompute makes it OK here (right-click model name 'FrontBase0' in the TreeView, click 'Mark to recompute', press 'F5').
Re: Intersection of 2 protrusions that should not be empty
In case of the boolean "cut" would work better than the "intersection", i reversed the sketch and cut.
It's better but one zone that shoud have been cut is still here.
Recompute doesn't work here (neither with intersection or cut).
It looks like a Bug.
It's better but one zone that shoud have been cut is still here.
Recompute doesn't work here (neither with intersection or cut).
It looks like a Bug.
- Attachments
-
- FreeCADcommon2cut.png (156.7 KiB) Viewed 1844 times
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- FrontBase1cut.FCStd
- (74.35 KiB) Downloaded 68 times
Last edited by chesss on Thu May 28, 2020 5:54 pm, edited 1 time in total.
Re: Intersection of 2 protrusions that should not be empty
It's visible why on your screenshot. A cut line is perfectly aligned with a seam line. This sometimes can lead to problems similarly to coplanar faces.
Re: Intersection of 2 protrusions that should not be empty
Coplaner issue.
I moved SketchXZ .1mm and all is good:
I moved SketchXZ .1mm and all is good:
- Attachments
-
- FrontBase1cut_mac.FCStd
- (58.76 KiB) Downloaded 62 times
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
Re: Intersection of 2 protrusions that should not be empty
OK, I new for coplanar faces, but I never had any problem with lines.
Thank you very much it works now.
Thank you very much it works now.
Re: Intersection of 2 protrusions that should not be empty
Well, basically any sketch that creates or geometry that ends up coplaner can cause the issue.
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."