Inverse Tangent

Chad_Fortune

I see Inverse Tangent "atan()" exposed inside FeatureScript documentation, but when I try to use it in a Part Studio I get errors. I created a Featurescript to be able to use the inverse tangent to pull the answer out. Inverse tangent is a pretty commonly used in trig and the workaround is a backwards way of getting an answer.

On a side note, atanh and tanh functions are shown under Math: math, but the atan, asin, and acos functions are under Math: units. Other trig functions are located under both tags.

ilya_baran

Without specific errors, I can't be sure, but the reason is probably that atan returns an angle, not a number.  That is also the reason for the difference in which FS module they are located in.

john_mcclary

OnShape in very picky about it's units.

try throwing a '/ degree' at the end of atan if you just want a unitless number, and make sure you add '* degree' where degrees are required for input.

I've had a similar problem in an equation, here is what my result looked like in the end to clear all the errors:
atan(((DeltaY_90 / Shingles_Per_90)- .3125) / (sin(90 * degree / Shingles_Per_90) * (Outside_Dia / 2))) / degree;

Hope that helps

Chad_Fortune

Thanks John, I'm still getting used to having to add those.