View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001460||GCS||[Sketcher] Bug||public||2014-03-03 22:58||2018-06-09 09:14|
|Target Version||Fixed in Version|
|Summary||0001460: Changing size sometimes cause overconstrained model|
|Description||I have a sketch of an IKEA Ivar shelf.|
When I try to change the size, length or width, by a small amount things changes as expected. When I try a large change one of the lines changes direction and constraint errors are reported.
You can get to the "large result" by doing it in small increments so it's not the static values that are the (obvious) problem but "large" increment.
|Steps To Reproduce||1. Load the sample file and open the extruded sketch. Not sketch_01!|
2. Change the x-width from 160 to 170. It works nicely.
4. Change the x-width from 160 to 260! Lots of constraint errors.
|Additional Information||I also expected this sketch to be closed so the extrusion would have had a top and a bottom, not just sides.|
Hyllplan.FCStd (5,728 bytes)
>I also expected this sketch to be closed so the extrusion would have had a top and a bottom, not just sides.
Have you not noticed the "Create solid" checkbox when you created the Extrude?
In any case if you want to create solids from sketches, use Part Design Pad, not Part Extrude.
No I haven't noticed it [Create Solid], but I was looking something like it.
My experience is limited to Alibre, and only a little of it.
How to choose a way to work is a mystery to me.
Why one should choose one <what ever you call it> over something else.
The bug tracker is not a good place to get experience with freecad. Your best bet is to post your questions/problems on the forum and let some of the veterans help you determine if/what is a bug. Thanks and good luck.
||Just ignore the "additional information". I do think I have described an error.|
The added relationship seems correct.
The sketch is indeed under constrained. There are multiple solutions to the set of constraints I had given. The sketcher reports fully constrained.
Sorry, I forgot to add that I could duplicate the problem on latest master branch. AFAIK this is indeed a bug because the small line segments switch sides.
One workaround: if you delete Constraint33 (160 mm) and replace it with a horizontal distance constraint that spans the whole width of the profile rather than just the horizontal line, you will notice that the error does not repeat.
As tanderson69 said, the rest is a discussion for the forum.
OS: Ubuntu 12.04.4 LTS
Version: 0.14.3252 (Git)
Python version: 2.7.3
Qt version: 4.8.1
Coin version: 3.1.3
SoQt version: 1.5.0
OCC version: 6.7.0
||@normandc is this issue still persistent?|
I can reproduce with the current PPA
OS: Ubuntu 16.04.3 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.12772 (Git)
Build type: None
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.1.0
It is a combination of the solver limitation (flipping) and poor constraint selection.
This one has finally been fixed with the merge of the redundant detection.
Now, when opening the sketch it reports redundant constraints. After deleting those you can set the 160 dimension to whatever value without any constraint issue.
|2014-03-03 22:58||Kjell_Elster||New Issue|
|2014-03-03 22:58||Kjell_Elster||File Added: Hyllplan.FCStd|
|2014-03-04 01:19||normandc||Note Added: 0004371|
|2014-03-04 08:28||Kjell_Elster||Note Added: 0004372|
|2014-03-04 17:19||tanderson69||Note Added: 0004382|
|2014-03-04 17:42||Kjell_Elster||Note Added: 0004383|
|2014-03-04 18:32||wmayer||Relationship added||related to 0000754|
|2014-03-04 23:12||Kjell_Elster||Note Added: 0004384|
|2014-03-05 01:14||normandc||Note Added: 0004385|
|2014-03-05 08:52||wmayer||Assigned To||=> logari81|
|2014-03-05 08:52||wmayer||Status||new => assigned|
|2017-04-02 08:56||kkremitzki||Status||assigned => new|
|2017-04-02 08:56||kkremitzki||Assigned To||logari81 =>|
|2017-04-28 16:14||Kunda1||Note Added: 0008807|
|2017-12-12 15:02||abdullah||Tag Attached: Solver|
|2017-12-12 15:04||abdullah||Note Added: 0010587|
|2017-12-13 15:20||Kunda1||Project||Sketcher => GCS|
|2018-06-09 09:14||abdullah||Assigned To||=> abdullah|
|2018-06-09 09:14||abdullah||Status||new => closed|
|2018-06-09 09:14||abdullah||Resolution||open => fixed|
|2018-06-09 09:14||abdullah||Note Added: 0011379|