Driving an extrusion with a radius?

[bearman305]

I am trying to create a parameter to drive an extrusion with a radius.  However, I have had no luck in creating it.  I want to use a radius to drive the extrusion length.  My example would be the following.  I have a 5" radius, I want the extrusion to be 2x the radius; so in this case 10" overall length.  If the radius was changed to 2.5". the overall extrusion would adjust to be 5" in length.  When I have attempted to create the parameter, it will not allow me to chose the radius.  I have named radius in the parameter (if I adjust the dimension, it will adjust the radius accordingly).  However, when I hit E (for extrude) and begin to type in =radius*2, it does nothing nor can I hit "ok".  Could someone explain to me if the software does not allow for this type parameter or what I might be doing wrong?  Thank you for your help, Bear

[TrippyLighting]

Please share what you have modeled so far.

Export the design as a .f3d and attach it to a post.

[kacper.suchomski]

Please delete "=".

[g-andresen · Accepted solution]

Hi,

follow this screencast

To do this, you must have Parametrics enabled, i.e., a timeline exists

günther

[bearman305]

Thank you for illustrating how I could make this work, I appreciate your help.  Good day,