parametric object does not use linked values

[flavios]

In the process of learning how to use FreeCad I created a "Part" and a "Spreadsheet" where I wrote some of the key "measures" I wanted to use as constraints. When I change the value in the spreadsheet the corresponding constraint does not change... unless I enter again to change its value and call on the expression (without change). When I press enter the new value appears. Obviously there is no point in making a parametric oject if the values do not update automatically when changed. So I suspect I did something wrong or unwillingly changed some critic preference. (I also pressed UPDATE on the sketch and recalculated the object).

My Part+Body is relatively complex with about a dozen Sketches and the spreadsheet contains 2/3 dozen values. I thought I could have reached a limit but it is unlikely and there is no error message.
Flavio

[thomas-neemann]

..

can you upload the file somewhere?

[chrisb]

When I press enter the new value appears.

Sometimes the recompute is delayed due to performance reasons. You can always trigger it manually with the recompute icon.

[flavios]

Thomas, here is the file https://drive.google.com/file/d/1pHnGrk ... sp=sharing

I made it a "general issue" picking a single constraint but as you can see the "recalculation" motor appear to be stopped for all the rest of the constraints. My ambition was to have a parametric polygon that could be "zoomed" as I have no idea of the final components that can fit inside it... the second part is the other half of the case.

The two following images show the specific constraint I was pin-pointing.

FCadForum1.png (41.1 KiB) Viewed 704 times

FCadForum2.png (13.8 KiB) Viewed 704 times

I am an absolute beginner, sorry.
Tks.
Flavio

[Shalmeneser]

Green_ButtonStep_PAD is broken (sketch not closed) so any further computation is stopped.
https://wiki.freecadweb.org/Tree_view/en#Overlay_icons

[thomas-neemann]

...

when i open it in realthunder this message

e.png (56.67 KiB) Viewed 696 times

says that a contour is not closed. I would check that if I were you



edit

Shalmeneser was faster

[thomas-neemann]

...

this message comes from the master

e2.png (48.61 KiB) Viewed 692 times

[flavios]

Thanks. It works. This is a very basic information I overlooked. Fundamental.

I was not aware because the sketch was fully constrained when I left it. The new issue appears to be that giving a parameter lenght there is no fixed versus and no addtional costraints are allowed... I mean (see following image) that the 3mm segment can go either side of the "wall". You cannot move it when fully constrained but apparently it was relocated. The sketch you pointed to had the 8mm segment reversed and disconnected. Given that it is a simple rectangle and that it happens twice I suspect a bug. To correct it I had to delete the segment and create it again in the right spot.

Giving a negative lenght would mean nothing. Is there a costraint that could avoid a perfectly legitimate mirror?
F

[thomas-neemann]

....

if a reference is to be reliable, i create it in draft. like here from min 0:27


https://www.youtube.com/watch?v=YV5TUqdZO20

phpBB [video]

[bambuko]

...if a reference is to be reliable, i create it in draft...

Your advice should come with a warning
the author is biased and prejudiced against anything that is not created in Draft workbench