Need help on A2Plus

Discussion about the development of the Assembly workbench.
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AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Need help on A2Plus

Post by AshAsh »

I have been Doing some assembly on A2plus, and I am hitting roadblocks.

1. I make corrections on the Part while it is inserted in assembly, and when i hit refresh in A2plus the part scrambles and after that i cannot insert any part as it gives out this message : Constraints Inconsistant. Cannot solve system. Please delete your last created constraint!.

I checked but no constraint has been there in any part of insertion, can you help me please to solve this.
Roadblock.jpg
Roadblock.jpg (197.31 KiB) Viewed 2422 times
Rgds,
Ash.
AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Re: Need help on A2Plus

Post by AshAsh »

Sorry the version is :
Ver.jpg
Ver.jpg (205.88 KiB) Viewed 2421 times
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dcapeletti
Posts: 504
Joined: Wed Jul 23, 2014 2:27 pm

Re: Need help on A2Plus

Post by dcapeletti »

Hello, there's a thread called Assembly that raises questions of this kind. See https://forum.freecadweb.org/viewforum.php?f=20

Tip, update A2Plus (0.2.4) from Addons Manager and start using FreeCAD version 0.18 from here https://github.com/FreeCAD/FreeCAD/releases as it will be available very soon.

In the latest version of A2Plus, when you remove a part, the restrictions on other parts on which it depends are removed. It also has icons with functions to see the restrictions that are causing the problem.

Greetings
kbwbe
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Location: Germany, near Köln (Cologne)

Re: Need help on A2Plus

Post by kbwbe »

AshAsh wrote: Sat Jan 12, 2019 3:47 am I have been Doing some assembly on A2plus, and I am hitting roadblocks.

1. I make corrections on the Part while it is inserted in assembly, and when i hit refresh in A2plus the part scrambles and after that i cannot insert any part as it gives out this message : Constraints Inconsistant. Cannot solve system. Please delete your last created constraint!.

I checked but no constraint has been there in any part of insertion, can you help me please to solve this.
Hi,
probably you are facing the topological naming problem of FreeCAD.
After editing a part, the numbers of vertexes/edges/faces often get mixed up by FC. This can lead to constraints which refer to wrong geometry and the system gets not solvable.

In your case, i would try to delete all constraints of the part, which has been edited. (select the part and hit the button with the red X)
After doing this, the message "System not solvable" should disappear.

Now you have to constraint this part newly again.
KBWBE

https://github.com/kbwbe/A2plus
latest release: v0.4.56, installable via FreeCAD's addon manager
Tutorial: gripper assembly https://www.youtube.com/watch?v=QMxcQ5tssWk
Documentation: https://www.freecadweb.org/wiki/A2plus_Workbench
AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Re: Need help on A2Plus

Post by AshAsh »

Hi,

Which is the file i need to download on the 0.18 Pre release for win 10 64 i tried but it seems that it is not working.

Regards
Ash.
kbwbe
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Posts: 1052
Joined: Tue Apr 10, 2018 3:12 pm
Location: Germany, near Köln (Cologne)

Re: Need help on A2Plus

Post by kbwbe »

AshAsh wrote: Fri Jan 18, 2019 1:30 am Hi,

Which is the file i need to download on the 0.18 Pre release for win 10 64 i tried but it seems that it is not working.

Regards
Ash.
Simple install or update A2plus with the FreeCAD's add-on manager.
KBWBE

https://github.com/kbwbe/A2plus
latest release: v0.4.56, installable via FreeCAD's addon manager
Tutorial: gripper assembly https://www.youtube.com/watch?v=QMxcQ5tssWk
Documentation: https://www.freecadweb.org/wiki/A2plus_Workbench
AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Re: Need help on A2Plus

Post by AshAsh »

Hi,

I updated to the newer A2plus 0.26 now I have a new problem the constraints are not active and I cannot select them. How do I solve this.

Ash.
AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Re: Need help on A2Plus

Post by AshAsh »

This is how the page looks
No Constraints.png
No Constraints.png (148.12 KiB) Viewed 2244 times
kbwbe
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Posts: 1052
Joined: Tue Apr 10, 2018 3:12 pm
Location: Germany, near Köln (Cologne)

Re: Need help on A2Plus

Post by kbwbe »

AshAsh wrote: Sun Jan 20, 2019 6:16 am I updated to the newer A2plus 0.26 now I have a new problem the constraints are not active and I cannot select them. How do I solve this.
Hi Ash,
in newer A2p versions, the constraint buttons are selection sensitive. Select what you want to constraint, then appropiate buttons geht activated. Please see screenshot:
.
Active-Buttons.png
Active-Buttons.png (42.65 KiB) Viewed 2220 times
KBWBE

https://github.com/kbwbe/A2plus
latest release: v0.4.56, installable via FreeCAD's addon manager
Tutorial: gripper assembly https://www.youtube.com/watch?v=QMxcQ5tssWk
Documentation: https://www.freecadweb.org/wiki/A2plus_Workbench
AshAsh
Posts: 33
Joined: Tue Dec 11, 2018 7:54 am

Re: Need help on A2Plus

Post by AshAsh »

Howdy, Thanks for the Info, I am getting used to them.
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