Can you tie a variable Fillet point to a sketch constraint?

[Fab_Things]

I'm designing a spacer with a hole near the edge.  Depending on the application, the size of the hole needs to change.  How can I have the variable fillet points (1,2, & 3) be constrained to the points on the hole indicated by the construction lines in the attached file?  Right now, whenever I need to change the hole size, I need to manually adjust where the fillet changes dimension.

[wersy]

I don't see a way to link a parameter in the settings.

[g-andresen · Accepted solution]

Hi,

In the screencast, I show a way to control radii.
To do this, you have to describe a regularity.
I have done this with a product equation.

günther

[Fab_Things]

Hi @g-andresen, thank you for your help!  I'm studying your clip and might have a follow-up question or two for you!!

[Fab_Things]

Hi @g-andresen,

How do you link the user parameter 'mid_radius' to its counterpart under 'Fillet2', MidRadius d28?:

EDIT:  Believe I figured that part out, you simply specify that parameter name in the 'Expression' column for 'd28'.

Thank you for your solution @g-andresen, this is awesome!

[g-andresen]

Hi,

I would first define variables for the radii start/end and hole_diameter as well as the reference value.
Then you can calculate the radii mid_left/right and center based on the reference and bore diameter and add them to the fillet menu.

The appropriate reference value can easily be determined by trial and error.
It may be necessary to define 2 different reference values for r_mid and r_center.

günther

[Fab_Things]

Is the reference value a static value (based on either the smallest hole
diameter or the largest) that you set to some value that will not break the
variable expressions being used to facilitate the various hole diameter
setups?

[g-andresen]

Hi,

---

@Fab_Things wrote:
Is the reference value a static value (based on either the smallest hole
diameter or the largest) that you set to some value that will not break the
variable expressions being used to facilitate the various hole diameter
setups?

---

In this case, it was determined from the existing value (center = 4.17 mm) and the hole (10 mm).

günther