Entering the dimensions changes the shape Sketcher

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Ahmed Al-Qttawy
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Joined: Fri Sep 23, 2022 6:44 pm

Entering the dimensions changes the shape Sketcher

Post by Ahmed Al-Qttawy »

I have a problem that causes me problems when changing the dimensions of a shape.

The problem is when I change or enter a size, Freecad changes the shape exactly as in the picture.

What is the solution?
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onekk
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Re: Entering the dimensions changes the shape Sketcher

Post by onekk »

Ahmed Al-Qttawy wrote: Thu Oct 06, 2022 11:44 am What is the solution?

Hello,

If you set a dimension constraint it will modify the sketch, but as example if you dimension a line that has other constraints, change is propagated and if you have not carefully done the constraints strange thing may happen, and your case are happening.

To get more help please read:

http://forum.freecadweb.org/viewtopic.php?f=3&t=2264


and post the required informations, and if you post an example file were the "strange behaviour" occur maybe some "skilled helper" could find the culprit.

For sketcher there are a very good introduction made by @chrisb:

https://owncloud.gwdg.de/index.php/s/eZ ... 9/download

Where you will find more detailed explanation.


Regards

Carlo D.
GitHub page: https://github.com/onekk/freecad-doc.
- In deep articles on FreeCAD.
- Learning how to model with scripting.
- Various other stuffs.

Blog: https://okkmkblog.wordpress.com/
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Shalmeneser
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Re: Entering the dimensions changes the shape Sketcher

Post by Shalmeneser »

File ?
The sketch solver find a mathematical solution for your constraints. Perhaps it's not YOUR solution. :mrgreen:
Try to modify your form (with constraints or not) with small steps.
Ahmed Al-Qttawy
Posts: 3
Joined: Fri Sep 23, 2022 6:44 pm

Re: Entering the dimensions changes the shape Sketcher

Post by Ahmed Al-Qttawy »

Many thanks
/Steve
Posts: 40
Joined: Wed Nov 11, 2020 9:59 pm
Location: Colo. USA

Re: Entering the dimensions changes the shape Sketcher

Post by /Steve »

so in your 2nd picture if you sel the bottom left point you could give it a dim of 302 and the figure would look like you wanted it. sorry if you already know this.
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