topic Re: rotate a mounting hole keeping one hole fixed and relationship unchanged. in Fusion Design, Validate & Document Forum

rotate a mounting hole keeping one hole fixed and relationship unchanged.

stuart_chale — Tue, 06 Jan 2026 03:32:49 GMT

Still a novice and mostly using Fusion for 3D prints. Currently working on a mount for a microswitch. 2 holes for the switch. The second hole is displaced from the first by 22.2 mm lengthwise and 13.3mm width wise.

I have constrained the first hole to edges of the plate 30mm from each end and added constraints from the first hole to the second hole by the above measurement.

What I am trying to do is simply rotate the 2nd hole while keeping the first hole at 30mm from the 2 edges while keeping the 2 displacement measurements the same. Doing this to fine tune the position for activation of the microswitch. I tried editing the first hole and rotating it but that didn't change the second hole. If I move the second hole I lose the displacement measurements.

Screenshot of project and Fusion file attached.

Thank you,

Stuart

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

laughingcreek — Tue, 06 Jan 2026 05:16:39 GMT

in certain circumstances, dimensions constrain themselves to measure just vert/horizontal, effectively locking the point dimensioned in place. dimension some construction lines instead.

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

TheCADWhisperer — Tue, 06 Jan 2026 06:20:21 GMT

@stuart_chale

Here is another way to visualize the position. Drag the circle along the arc.

Dimension angle as needed.

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

stuart_chale — Tue, 06 Jan 2026 11:24:51 GMT

Appreciatew the reply I need to learn more about the use of construction lines

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

stuart_chale — Tue, 06 Jan 2026 11:26:07 GMT

Appreciate the reply I need to learn more about the use of construction lines.

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

stuart_chale — Tue, 06 Jan 2026 11:28:33 GMT

Appreciate the response I could have used the large circle and just moved the second hole by eye, but the use of the constraint makes it work properly.

Thank you

Re: rotate a mounting hole keeping one hole fixed and relationship unchanged.

stuart_chale — Tue, 06 Jan 2026 11:33:02 GMT

I actually came up with one more solution while lying in bed 🙂

Simply add a third constraint of measurement from one hole to the other and then get rid of the original horizontal and vertical constraints. Then the second hole can also rotate in a circle around the first.

As always I appreciate the replies.

Stuart