A2plus incosistent DOF

Discussion about the development of the Assembly workbench.
Ben Jammin
Posts: 22
Joined: Thu Mar 08, 2018 6:19 pm

A2plus incosistent DOF

Postby Ben Jammin » Tue Apr 14, 2020 5:55 pm

Hi Freecad users,

I am using A2plus v0.4.46b and I noticed something which I don't understand. Here is what I did :

first I set 2 planes constraints between blue part and the green part therefore I get as expected one DOF
Sélection_394.jpg
Sélection_394.jpg (95.58 KiB) Viewed 650 times

then I add another part which I fixed to the green part with an circular constraint (rotation unlocked) and I noticed that now, green part and blue part are fixed to each other (DOF=0).
Sélection_395.jpg
Sélection_395.jpg (97.03 KiB) Viewed 650 times
how is that possible ?


OS: Ubuntu 16.04.6 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4.
Build type: Release
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)
Ben Jammin
Posts: 22
Joined: Thu Mar 08, 2018 6:19 pm

Re: A2plus incosistent DOF

Postby Ben Jammin » Tue Apr 21, 2020 9:41 am

was my question dumb ? did I misunderstand the A2plus workbench principle ?
dan-miel
Posts: 124
Joined: Thu Sep 13, 2018 12:29 am
Location: Spokane WA. USA

Re: A2plus incosistent DOF

Postby dan-miel » Wed Apr 22, 2020 5:59 pm

Ben Jammin wrote:
Tue Apr 21, 2020 9:41 am
was my question dumb ? did I misunderstand the A2plus workbench principle ?
I'm not sure if the assembly is correct. Your tree indentation looks different than the indentations that I have in my assemblies. I'm not sure why that is. Would you post your file?
Dan Miel
Attachments
Pic for Ben.JPG
Pic for Ben.JPG (30.24 KiB) Viewed 169 times
Ben Jammin
Posts: 22
Joined: Thu Mar 08, 2018 6:19 pm

Re: A2plus incosistent DOF

Postby Ben Jammin » Fri May 22, 2020 4:55 pm

You are right, the circular constraint was supposed to appear in the construction tree. I just re-opened the freecad model and even though the tree indentation is correct (i.e. circular constraint was there) I still get the same DOF.
As you suggested I joined, the freecad model.
Attachments
assemblage.FCStd
(316.37 KiB) Downloaded 4 times