Dimension Formula with parameter multiplication failing

[gliebig]

I'm using the parameters to make a saleable star to be used in a Christmas display. Pretty simple. StarDiameter=x, MaterialThickness=y. I'm trying to dimension circumscribed circle around the 5 pointed star using the following formula StarDiameter * (1 + MaterialThickness) and Fusion refuses the formula. 1+MaterialThickness works but when I try to multiply it fails. Here are the parameters:

StarDiameter = 42 in

MaterialThickness = .188 (3/16) in

I would have thought this would have been pretty simple. Any ideas?

[alessandro.gasso]

Hi, the result of the formula StarDiameter * (1 + MaterialThickness) is Square Inches.

If you write the formula like this (StarDiameter * (1 + MaterialThickness))/1 in, you get the result in inch and Fusion will accept it.

I hope it helps.

Regards,

[g-andresen]

Hi,

(1 + MaterialThickness) > wrong

instead:

(1 in +MaterialThickness)

Formula:

XX = StarDiameter * (1in+ MaterialThickness) / 1in

günther

[gliebig]

I just tried that and it does not work. Note: xx is becoming a unitless scaling factor for the circumscribing circle.

MaterialThickness = 3/16 in (.188)

StarDiameter = 42 in

These two formulas work:

xx=(1 + MaterialThickness)

xx=(1in + Material Thickness)/1in

xx = 1.188 with either formula

but when I try to multiply xx by StarDiameter the formula fails.

[g-andresen · Accepted solution]

Hi,

if you need it unitless > divide Stardiameter by 1in

this way:  XX = Stardiameter / 1 in * ( 1 in + MaterialThickness ) / 1 in

günther

[gliebig]

This is what finally worked:

( 1 in + MaterialThickness ) * StarDiameter / in

Thank you for pointing out In^2