Constrain sketch on a face to a parameter.

[CarbonMan]

Hi,
In the attached there is a box and a lid. It is parameterized.

Sketch006 is a hole in one of the box's sides. I am trying to make it constrain to the center of the side. The width of the box is specified by params.width.
I would like the hole to align using this formula
(params.width - params.micro_b_cutout_width)/2

The first problem I have is that I have added micro_b_cutout_width to the params list but it only appears when the list is edited. It doesn't appear when editing formulas.

The second problem is the sketch has 1 dof (horizontal) but I don't seem to be able to constrain it to the box face even as a simple set distance from the edge.

Thanks.

[Bance]

The first problem the name not appearing, was caused by the fact that you didn't enter a formula for that parameter (13mm was not a formula/entered as a formula.) There is no alias for it in params either.

I can set a horizontal distance from the ext geom no problem ( this is not a good idea TNP!)

Don't place sketches on faces TNP, instead use std planes and offset them.

Besides that it would be much easier if the model was centred on the origin. There is probably no need for a STD part here.

[Shalmeneser]

Fillet or Chamfer can work on multiple edges (with the same values) : less features in the construction tree, less tnp risk.
It's better to fillet inside the sketch for TNP reasons.

Try to use axis.

[dprojects]

In the attached there is a box and a lid. It is parameterized.
Sketch006 is a hole in one of the box's sides

Why you want to have parametrized such a simple box? Why you use Chamfer at hole edge if there is Countersink option for that?

[papyblaise]

A few tools well used it goes faster

[CarbonMan]

Thanks for the replies

A couple of points;
This is my first project, after going through some of the training material.
The box isn't my design, I am just trying to modify it.
Chamfer was done prior to me putting a hole in the side.

I think I stuck in the ways of thinking from other packages. I'll try again by ading a plane.

[Bance]

Don't go adding planes... There's no need for that.