topic Re: Some fx:parameters not updating after parameter change in Inventor Forum

Some fx:parameters not updating after parameter change

MTheDesigner — Tue, 25 Jan 2022 18:39:34 GMT

I have a stair generator that is driven off of a few parameters and some math.

The fx parameter that is giving me trouble is the calculation for the number and the spacing of the steps.

If I change the height of the walkway it updates everything in the sketch correctly.

However if I change the angle of the steps it fails to update the number of steps required.

But if I change the angle again to exactly the same value it updates correctly.

It seems to me like it is requiring 2 updates in order to calculate correctly, I have checked the equations and nothing seems to have a circular dependency, Does anyone know why this might be happening?

Re: Some fx:parameters not updating after parameter change

MTheDesigner — Tue, 25 Jan 2022 19:00:59 GMT

From doing some experimenting it seems like the problem might have been that I was using a driven dimension in my calculation. Once I replaced the driven dimension with a formula that takes only user inputs as data it worked and updated correctly. However this isn't great, it takes a while to come up with the equation it would be far faster if I could just use a reference dimension. Also it seems to be a kind of inconsistent problem, sometimes driven dimensions seem to work fine when it comes to updating but sometimes they don't. I am going to leave the question open for the rest of the day just to see if anyone can explain why this is.