Fully defined sketch not redrawing correctly after dimension change.

[Anonymous]

Having an issue with sketch objects not redrawing correctly after changing a user defined parameter. The parameter changed isn't used in the sketch, but it changes the position of the geometry that was projected into this sketch and then changed into construction lines (RaspberryPi board outline that two other parameters control the distance from the left and bottom edges). With the 10mm change the added mid point construction line (used for mirroring) moves with the projected geometry, while with a 20mm change it doesn't. With a 10mm change the sketch moves with the projected geometry and gets messed up, while with a 20mm move it doesn't move breaking many features in the timeline. The sketch also references a Pi Boards component edge, with the 10mm change it gets moved to the other side of it, while with the 20mm move it's just completely broken. Looking for some help on what to change to get this sketch to update appropriately when the dimensions are changed.

[davebYYPCU]

My guess is the 5 tracks of parallel lines that contributed to the solver finding multiple choices.

You tend to use too many duplicate dimensions, and not enough constraints.

I altered your workflow a little.  You have a tongue and groove with confused dimensions.

I have made a "correct" t&g, with two sweeps and can't break the path sketch with parameter changes now.

file included.

Might help....

[jhorstink]

Well done, and it gives a nices sketch, but it does not stabilize it, the problems still occur when making the box smaller.

Changing the dimensioning from the left, in stead of from the right, solves the problem.

Regards,

[davebYYPCU]

Yep my testing was from small to big, sorry about that.

[Anonymous]

I found that I had 2 duplicate line and arc projections that were used as references on the right side. By removing them and adding back the original dimensions, which disappear during this process, the problem with stretching the side went away.

Note: Adding back the dimension also added a duplicate line again, but at lease my duplicate count dropped by one.

[mikec74]

I'm still having this issue 5 years later so it does not appear to be resolved. I did find a work around that appears to be working (after many hours of frustration). If you project the geometry you are trying to reference in one sketch, then close that sketch and create a second sketch which then references only those projected geometries rather than the body itself, it seems to update properly. I would recommend you even hide the bodies when working on the second sketch so you only reference the projected geometry in the first sketch.  don't really know why, but it seems to work.

[TrippyLighting]

@mikec74 can you share a design that exhibits that behavior in a new thread?