Curve driven pattern
You actually *can* link to the length of a curve, but it gets messy and it’s probably not the right way to do things.
Take a look at what I did in the attached file. In the parameters there’s a unit mismatch between inches and unit less, which Inventor resolves as being centimeters, apparently, so I have to divide the curve length by 2.54 to get it back to inches, and then divide that by 2 to get the correct number of holes, which then shows an error due to expecting unit less but finding inches… but it’s not a fatal error, and it will allow you to actually do it.
I tested this part with changing the outside dimensions, and it seems to be fairly robust- I didn’t get any errors beyond the one already described.
Rusty
This works great, especially with a few tweaks to equations:
Instead of the "round" function you can use "floor" (round down) or "ceil" (round up), depending on your needs. You could also add a user parameter for the preferred spacing, to be used in both the holeQuan parameter and Sketch2 (not shown above).
Sam B
Inventor Pro 2025.2.1 | Windows 11 Home 24H2
Interesting- adding the round function actually cleans up the unitless error. I didn't realize that would happen.
Yeah, that's a definite improvement.
Rusty
No, I changed the units on the "2" from unitless to inches. The round function requires a unitless argument.
Sam B
Inventor Pro 2025.2.1 | Windows 11 Home 24H2
