[Solved (workaround)] Rings placement

[duffy55]

Hello I am using:
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16131 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 3129ae4296e40ed20e7b3d460b86e6969acbe1c3
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)

and

A2plus 0.4.26b

In the attached figure you can see an example of the met issue.
The problem was to put the rings in to 8 circular supports, the supports are oriented in 8 different angulation,
I resolved the issue with very complex sketch construction, for 8 times.

In this case, it would have been very useful to be able to use the internal circumference of the toroid as
plane definition and tangent positioning.

Piratically, the construction constrains should be:
1- ring parallel to the yellow face of the support.
2- distance from the yellow face of the support.
3- internal diameter of the ring tangent to the two green edges of the support ring.
What are you suggestions to speedy this kind of assembly?
Having already solved the issue , my question is due only to ameliorate my know of Freecad.

Thank you
Regards

[chrisb]

Moved to Assembly forum.

[duffy55]

Thank you for info

[kbwbe]

Hi,
unfortunately there is no constraint for a torus within A2plus at Moment. Instead, it is possible to work with a cylinder as a helping object. This helper can be made invisible later and it is not imported to a main assembly (A2p-preference "do not import invisible objects").
If you do offsets to the constraints of the cylinder, the torus will move accordingly. But you have to calculate the offsets manually in advance.

See here:

torus-assembly.png (152.37 KiB) Viewed 1654 times

Please find files attached.

[duffy55]

Thanks alot

[Kunda1]

unfortunately there is no constraint for a torus within A2plus at Moment. Instead, it is possible to work with a cylinder as a helping object.

Hi @kbwbe, is it on the A2plus roadmap?

[kbwbe]

Hi @kbwbe, is it on the A2plus roadmap?

Hi @Kunda1,
not up to now, but yet. I will refine some existing constraints so that they can be used with a torus.
(in praxis this is a relative rare usecase)