4 Replies Latest reply on Apr 9, 2015 2:08 PM by Pratham Singh

how to make all dimension relative to some other dimension in a sketch?

like if a make a rectangle, i want its one side to be twice of other. then if i make a circle, how to make its radius one fourth or rectangles smaller side.

and then when i need to change dimensions, i could just change the dimension of smallest side of rectangle to change dimension of everything.of '

yes i am aware of 'equal to' constraint, but is there a way to do what i am asking for?
like for designing a nut and bolt, all the dimensions are related to the dia of the bolt. so it would be easy to give everything with respect to dia

• Re: how to make all dimension relative to some other dimension in a sketch?

Create a global variable (I'll call it dim) and use it for the dimensions.  In your example the small side of the rectangle would be =dim, the long side would be =dim*2, and the radius of the circle would be =dim/4.  Make sense?

• Re: how to make all dimension relative to some other dimension in a sketch?

Right-click on the Equations folder at the top of your tree and choose Manage Equations.

That will bring up the Equations dialog box.  Enter the name of your global variable (anything you want it to be), then enter the dimension in the Value / Equation column.  Then click on the OK button.

When you get to your sketch, when the conventional dimension box comes up, where you'd usually enter the desired dimension, type in the equals sign instead (=).  That will activate a drop-down where you can select your global variable.

Let me know if this helps, or if you need more explanation.

• Re: how to make all dimension relative to some other dimension in a sketch?

thanks again this is enough