sketch offset tool

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!
corvusdeux
Posts: 5
Joined: Sat Jul 04, 2015 10:46 am

sketch offset tool

Postby corvusdeux » Sat Apr 22, 2017 10:35 am

Hello comnunity,

First of all, congratulations for all last new features, are awesome!

I work every day whit Catia, and right now FreeCAD is very productive.

One question, and so sorry is someone ask before. I can not find any post whit search.

It possible use offset tool in actual Skecher WB in 0.17 dev?? I have this one, ppa ubuntu. But I cant find it.

Thanks in advance!!! :)
chrisb
Posts: 25799
Joined: Tue Mar 17, 2015 9:14 am

Re: sketch offset tool

Postby chrisb » Sat Apr 22, 2017 3:01 pm

There is no offset tool in Sketcher WB. There is a 2D offset in Part WB, you may have a look at it. It can offset sketches as well but I am not sure how the result behaves in FreeCAD 0.17 in terms of mixing Part Design/Body and Part WB stuff.
https://www.freecadweb.org/wiki/Part_Offset2D
corvusdeux
Posts: 5
Joined: Sat Jul 04, 2015 10:46 am

Re: sketch offset tool

Postby corvusdeux » Sat Apr 22, 2017 6:34 pm

Thank you!!! :D I try! ;)
User avatar
NormandC
Posts: 18534
Joined: Sat Feb 06, 2010 9:52 pm
Location: Québec, Canada

Re: sketch offset tool

Postby NormandC » Sun Apr 23, 2017 6:44 pm

@ Moderators

This topic should not have been posted in "Part Design module development" forum, but in "Help about using FreeCAD". Could you please move it?

Thanks.

@corvusdeux Unless you want to discuss development (as in programming), please do not ask questions in any of the Developers corner forum.

I'll remind you that the Forum Index has descriptions for each sub-forum. This one's is
About the development of the Part Design module/workbench. PLEASE DO NOT POST HELP REQUESTS HERE!
User avatar
DeepSOIC
Posts: 7665
Joined: Fri Aug 29, 2014 12:45 am
Location: Saint-Petersburg, Russia

Re: sketch offset tool

Postby DeepSOIC » Sun Apr 23, 2017 8:09 pm

moved.
User avatar
easyw-fc
Posts: 2857
Joined: Thu Jul 09, 2015 9:34 am

Re: sketch offset tool

Postby easyw-fc » Wed Sep 12, 2018 9:17 am

chrisb wrote:
Sat Apr 22, 2017 3:01 pm
There is no offset tool in Sketcher WB. There is a 2D offset in Part WB, you may have a look at it. It can offset sketches as well but I am not sure how the result behaves in FreeCAD 0.17 in terms of mixing Part Design/Body and Part WB stuff.
https://www.freecadweb.org/wiki/Part_Offset2D
it seems that Part_Offset2D doesn't work with negative offsetting (trying to shrink an outline)...
as in documentation:
https://www.freecadweb.org/wiki/Part_Offset2D

enlarge is fine:

Code: Select all

import Part
circle = Part.Circle().toShape()
enlarged_circle = circle.makeOffset2D(0.5)
Part.show(circle)
Part.show(enlarged_circle)
shrink-ed is wrong:

Code: Select all

import Part
circle = Part.Circle().toShape()
shrinked_circle = circle.makeOffset2D(-0.3)
Part.show(circle)
Part.show(shrinked_circle)
Traceback (most recent call last):
File "<input>", line 1, in <module>
Base.FreeCADError: FreeCAD exception thrown (makeOffset2D: result of offsetting is null!)
User avatar
DeepSOIC
Posts: 7665
Joined: Fri Aug 29, 2014 12:45 am
Location: Saint-Petersburg, Russia

Re: sketch offset tool

Postby DeepSOIC » Wed Sep 12, 2018 10:25 am

easyw-fc wrote:
Wed Sep 12, 2018 9:17 am
it seems that Part_Offset2D doesn't work with negative offsetting (trying to shrink an outline)...
Probably only on circles. 2D offset is surprisingly broken on the simplest thing to offset ever - full circles.
zmp2000
Posts: 7
Joined: Sat May 04, 2019 6:44 pm

Re: sketch offset tool

Postby zmp2000 » Thu May 09, 2019 7:33 pm

Currently an Offset tool for sketches was already requested
https://www.freecadweb.org/tracker/view.php?id=3708

in comments it's said that it would be avaliable for the 0.19 version, but currently was not delivered so far!
openBrain
Posts: 4473
Joined: Fri Nov 09, 2018 5:38 pm

Re: sketch offset tool

Postby openBrain » Thu May 09, 2019 7:55 pm

zmp2000 wrote:
Thu May 09, 2019 7:33 pm
in comments it's said that it would be avaliable for the 0.19 version, but currently was not delivered so far!
Seems logical as 0.18 is hardly released and 0.19 just started its development cycle. ;)
User avatar
xorx
Posts: 9
Joined: Tue May 02, 2017 8:30 am
Location: Cologne

Re: sketch offset tool

Postby xorx » Sat Apr 18, 2020 9:29 pm

Seems logical as 0.18 is hardly released and 0.19 just started its development cycle.
I am waiting for the sketch offset too, because I discovered a new application with FreeCad for me.

I started sewing a year ago and I am using FreeCad now as sewing pattern design software. The parametric sketcher is excelent for this purpose! Only TechDrawing workbench is needed beside sketcher.

In a last process step before exporting he pattern for printing a seam allowance has to be added to all edges of the pattern. This is in the simplest case a 2D offset of 1 to 2 cm on all borders. In more complex cases it would be useful to apply different offsets on different edges of the pattern.

I really love FreeCad. It has become an excellent tools with really useful features! Thanks to all developers.