"synchronize" constraints

[remizik]

Hello,

I have those 2 constraints (4mm)



I would like to be able to change both at the same time by changing 1 value only, like if there had an "equal" constraint between them.
Sorry if I'm not clear I'm still a noob with freecad

Thanks for your help

[meme2704]

Hi
there are several solutions:
you draw 2 lines of construction (in blue), constrain equal, and size a single

[remizik]

Thanks for your answer !

Since my part is a rectangle, I ended up using diagonals



What do you think ?
Cheers

[openBrain]

What do you think ?

I think that the 2 distances shown in your OP are equal only if your rectangle is actually a square. It doesn't work for a standard rectangle.

[meme2704]

there is one of the several other solutions

[DeepSOIC]

As long as both constraints are red, they can be tied with an expression (use f(x) blue button in value edit box, use something like Constraints.myLength). The constraint you refer to in an expression must have been given a name.

As of now, expressions involving blue constraints (reference dimensions) are not yet supported. Having support for them would give some awesome power, but it requires serious development effort. Your example features only red constraints, so it should work.

[remizik]

What do you think ?

I think that the 2 distances shown in your OP are equal only if your rectangle is actually a square. It doesn't work for a standard rectangle.

indeed, i'm stupid.
gonna use the other way then, thanks

[remizik]

As long as both constraints are red, they can be tied with an expression (use f(x) blue button in value edit box, use something like Constraints.myLength). The constraint you refer to in an expression must have been given a name.

As of now, expressions involving blue constraints (reference dimensions) are not yet supported. Having support for them would give some awesome power, but it requires serious development effort. Your example features only red constraints, so it should work.

Thank you this is perfect ! <3