Arc Length Dimensioning

jstevens1 · ‎09-08-2023

Hey! I am a self taught Fusion 360 user and I think I've gotten pretty comfortable with the program and have learned many tricks online to help me along the way. One problem I have run into recently though is that I cannot dimension the length of an arc. When dimensioning I am left with two options: dimension the radius of the arc, and dimension from one end of the arc to the other across a straight line. While both of these options work great in many scenarios I need to be able to dimension the actual length of the arc without knowing the radius or that end to end length. If anyone knows of anything I can do besides simply doing the math to find the radius that would be great!

Note: I do know the angle between the two points but that doesn't really change anything for the problem I am facing.

jhackney1972 · ‎09-08-2023

In the model sketch environment, there is not a way to dimension an Arc Length. This function was recently added to the 2D Drawing environment however.

You can measure the length of an Arc in the model sketch environment using the Plane Along a Path command, reading the measure when the plane is placed the extreme end of the arc.

John Hackney, Retired
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HughesTooling · ‎09-09-2023

To save you a bit of effort here's how to set up the parameters to calculate the radius from the angle and arc length.

Mark Hughes
Owner, Hughes Tooling
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