What does equality of arcs constraint mean?

Post here for help on using FreeCAD's graphical user interface (GUI).
Forum rules
and Helpful information
IMPORTANT: Please click here and read this first, before asking for help

Also, be nice to others! Read the FreeCAD code of conduct!
MauiWarrior
Posts: 41
Joined: Wed Apr 07, 2021 7:10 pm

What does equality of arcs constraint mean?

Postby MauiWarrior » Mon Apr 19, 2021 5:24 pm

Hi All,

In the attached sketch constraint 22 sets two arcs equal. Previous I also set these two arcs to have the same center. On the sketch they do not look equal. I am trying to figure out why.

Related questions: is there way to constraint arc length directly?
Attachments
first_step.FCStd
two arcs
(7.4 KiB) Downloaded 3 times
Bance
Posts: 1813
Joined: Wed Feb 11, 2015 3:00 pm
Location: London

Re: What does equality of arcs constraint mean?

Postby Bance » Mon Apr 19, 2021 5:34 pm

Set the ends of the arc's to be horizontal, now do the arcs look equal?
MauiWarrior wrote:
Mon Apr 19, 2021 5:24 pm
Related questions: is there way to constraint arc length directly?
You can give it an angle, so yes.

P.S. you meant equal in length? no it means equal radius.
mendy
Posts: 191
Joined: Mon May 21, 2018 2:16 pm

Re: What does equality of arcs constraint mean?

Postby mendy » Mon Apr 19, 2021 5:44 pm

As @Bance said

sketcher tutorial page 66 @chrisb put a lot of effort into the tutorial.
https://forum.freecadweb.org/viewtopic.php?f=36&t=30104
MauiWarrior
Posts: 41
Joined: Wed Apr 07, 2021 7:10 pm

Re: What does equality of arcs constraint mean?

Postby MauiWarrior » Mon Apr 19, 2021 6:11 pm

@mendy - thank you! I should have checked it first.

@Bance - thank you as well! It looks like I cannot select 3 points (origin and end points of arc) and constraint them. So I in order to constraint arc I probably need to give two angles constraints. Do you agree?
MauiWarrior
Posts: 41
Joined: Wed Apr 07, 2021 7:10 pm

Re: What does equality of arcs constraint mean?

Postby MauiWarrior » Mon Apr 19, 2021 6:14 pm

Nevermind! I found it in tutorial ;-) This tutorial is really good!
MauiWarrior
Posts: 41
Joined: Wed Apr 07, 2021 7:10 pm

Re: What does equality of arcs constraint mean?

Postby MauiWarrior » Mon Apr 19, 2021 6:14 pm

Nevermind! I found it in tutorial ;-) This tutorial is really good!