Sphere creation
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Sphere creation
Hello,
I'm quite new to FreeCad...
I'm trying to do a sphere (on the last sketch) and it doesn't work.
I want to do half a revolution (on the vertical axis by the center of the circle) of my last sketch...
I think I don't know how to give it the right axis...
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16117 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: dbb4cc6415bac848a294f03b80f65e888d531742
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)
If you can help, thank you.
Best regards,
I'm quite new to FreeCad...
I'm trying to do a sphere (on the last sketch) and it doesn't work.
I want to do half a revolution (on the vertical axis by the center of the circle) of my last sketch...
I think I don't know how to give it the right axis...
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16117 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: dbb4cc6415bac848a294f03b80f65e888d531742
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)
If you can help, thank you.
Best regards,
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- dcapeletti
- Posts: 504
- Joined: Wed Jul 23, 2014 2:27 pm
Re: Sphere creation
Hey, I've been going over your sketch. You have a line that does not produce a body. I frame it in the image. You can pass that line in build mode.
To create a revolution, you take the sketch and select the axis in which you want the revolution to be made. I attach the new file.
Greetings
To create a revolution, you take the sketch and select the axis in which you want the revolution to be made. I attach the new file.
Greetings
- Attachments
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- Haut_sv3.FCStd
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- revolution.png (108.34 KiB) Viewed 1116 times
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- construction mode.png (106.09 KiB) Viewed 1116 times
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- freecad.png (77.83 KiB) Viewed 1116 times
Re: Sphere creation
If you want to create a sphere by a revolution you have to model only half a circle. Otherwise you have so called self intersections.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Sphere creation
Hello,
Thank you very much.
I'm sorry, I didn't explain very well what I'm trying to do.
Let's see the "manual" document.
Best regards,
Thank you very much.
I'm sorry, I didn't explain very well what I'm trying to do.
Let's see the "manual" document.
Best regards,
- Attachments
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- sphere.pdf
- (487.96 KiB) Downloaded 28 times
Re: Sphere creation
Hello,
Thank you.
I'm sorry, I tried to cut the circle... but it seems it doesn't work.
Best regards
- Attachments
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- Haut_sv3.FCStd
- (29.56 KiB) Downloaded 21 times
Re: Sphere creation
I can have a look at this tomorrow - if nobody else replies.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
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- Veteran
- Posts: 5505
- Joined: Thu Apr 05, 2018 1:53 am
Re: Sphere creation
You need to use an arc instead of a circle if you only want half the sphere. In the video I put the circle into construction mode, then make an arc. The revolve axis is the construction line that was already there.
Re: Sphere creation
There are two more things to say about your model:
- The DatumPlane is unattached, which can make things attached to it unreliable or unpredictable
- The sketch for the sphere contains a 0mm horizontal distance constraint. Use vertical alignment constraint instead. It is in general recommended to prefer geometric constraints over dimensions.
- The DatumPlane is unattached, which can make things attached to it unreliable or unpredictable
- The sketch for the sphere contains a 0mm horizontal distance constraint. Use vertical alignment constraint instead. It is in general recommended to prefer geometric constraints over dimensions.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Sphere creation
Hello,TheMarkster wrote: ↑Thu Aug 08, 2019 11:57 pm You need to use an arc instead of a circle if you only want half the sphere. In the video I put the circle into construction mode, then make an arc. The revolve axis is the construction line that was already there.
Thank you very much.
Best regards
Re: Sphere creation
Hello,chrisb wrote: ↑Fri Aug 09, 2019 5:16 am There are two more things to say about your model:
- The DatumPlane is unattached, which can make things attached to it unreliable or unpredictable
- The sketch for the sphere contains a 0mm horizontal distance constraint. Use vertical alignment constraint instead. It is in general recommended to prefer geometric constraints over dimensions.
Thank you, I change the constraint to vertical. I was searching for a better solution, and you gave it to me
I don't know how to attach the plan...
Best regards,