Inventor General

## Inventor General

Distinguished Contributor
Posts: 189
Registered: ‎04-01-2013
Message 1 of 5 (125 Views)

# Cant use a specific parameter in a dimension

125 Views, 4 Replies
02-06-2014 06:14 AM

So im trying to make an equation using some info that i have. (((d00-(1)*.1875)+((d34*2)*d00))

that equation will determine where the plane is in relation to the amount of rings in the assembly. (i need the plane to be in the middle)

d00 is the amount of rings (thats the paramemter that drives how many rings there are)

d34 is half of the ring, so we multiply that to get 7.

.1875 is the space between rings.

But i have a problem. I cant start using the equation because parameters go crazy they wont accept the units "ul" becasue there not "in"

Is there a way for me to solve this problem by making the equation happen through ilogic and pushing it to parameters?

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*Expert Elite*
Posts: 2,470
Registered: ‎09-13-2011
Message 2 of 5 (114 Views)

# Re: Cant use a specific parameter in a dimension

02-06-2014 06:24 AM in reply to: m.teleguz1
Try dividing the answer by 1.
Mike (not Matt) Rattray

Valued Contributor
Posts: 102
Registered: ‎09-13-2012
Message 3 of 5 (110 Views)

# Re: Cant use a specific parameter in a dimension

02-06-2014 06:35 AM in reply to: m.teleguz1

This is an example for a property length in mm: where d00 is in ul.

Length = 1.0 mm + ( ( d00 / 1 ul ) * 1 mm )

This formule is changing the unitless d00 to mm so you can add it to Length.

Rob.

Autodesk Inventor 2012 Certified Associate & Autodesk Inventor 2012 Certified Professional.
Distinguished Contributor
Posts: 189
Registered: ‎04-01-2013
Message 4 of 5 (100 Views)

# Re: Cant use a specific parameter in a dimension

02-06-2014 06:54 AM in reply to: VdVeek

Im trying to make an equation for the parameter "Plane"

when i try to enter in the d00 it turns read and says "Warning...etc.." the ul dim is not recognised as a valid unit. I will try what you are posting to see if i can do it.

all i want to do is make the plane dynamic to the amount of rings so the plane is always in the middle of the assembly.

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Distinguished Contributor
Posts: 189
Registered: ‎04-01-2013
Message 5 of 5 (82 Views)

# Re: Cant use a specific parameter in a dimension

02-06-2014 07:46 AM in reply to: VdVeek

the solution to the dynamic plane was this: ( ( ( ( d00 - 1 ul ) * ( 0.1875 in ) ) + ( ( d34 * 2 ul ) * d00 ) ) / 2 ul )

d00 is the number of patterns

0.1875 is the space between patterns.

This will always have the plane in the middle of your patterns

The Plane uses the Plane parameter "obviously" with some luck it should be recreated simply. (dont know why inventor doesnt have that already incorporated)

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