detail item - slope parameter

[arkitek2ss]

I'm creating a detail item showing a sloped component that can (hopefully) be adjustable by instance when inserted.  In the family parameters under Type of Parameter there is the option for Slope.  how/where can I apply this slope parameter?  

thanks.

[ToanDN]

Is is a Type or Instance parameter?  If the former, edit type and enter the value; latter, select instance(s) and enter the value.

[arkitek2ss]

but to what can apply the slope parameter to?  there is no slope dimension or anything else.

[Ilic.Andrej]

There are two ways you can constrain the geometry with a slope parameter.

First- slope is a tangent function in right triangles. So, to get the angle from a slope, you can use the the inverse tangent function: atan()   Then, use the angle dimension and label it with that calculated parameter.

Second (and in my opinion way better)- the tangent function in right triangles or slope is the ratio between two dimensions. Lets call those a and h. So, if you have a, slope will help determine h and vice versa. Use a and h to constrain the position of the reference planes which drive the geometry.

Basic math...:)

[cbcarch]

-You could also use  Reference Line, and an angular dimension with a Parameter. ( Instance or Type.)

-Lock geometry to the Reference Line. Make sure the family flexes--then save/load into project.

-Then adjust angle in the project.

[ToanDN]

You can either enter a slope value (percentage, degree) and report the rise:run, or enter rise:run (1:10, 1:12) and report the slope value.  They are equally easy.  Which one do you need?

[arkitek2ss]

got it figured out.

create the following parameters:

Rise (instance)

Run (type)

Angle (instance) Formula Rise / Run * 100

1 reference plane

create filled region and show an angular dimension and set it to the Angle parameter.

see attached .rfa

[arkitek2ss]

as always, after I post, I figured it out before going back to the posts.

Thanks all.

[Ilic.Andrej]

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@arkitek2sswrote:

got it figured out.

create the following parameters:

Rise (instance)

Run (type)

Angle (instance) Formula Rise / Run * 100

1 reference plane

create filled region and show an angular dimension and set it to the Angle parameter.

see attached .rfa

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You really don't have to use Run in the formula, you can just use atan(Rise)

[arkitek2ss]

just realized that.

thank you

[gary]

This is a bit late but......

you are returning a percent of slope value not a degree value with (rise/run*100) formula.  Example, your family will return a value of 25 deg for rise=3 and run=12.  It should be 14.04 degrees.  It is at a slope of 25%.

Also, atan(rise) is not a complete argument.  You would have to use atan(Rise/Run) to get the actual angle.