How to create a scalloped border on an oval?

[rubyandwhimsy]

Hello community,

I'm having a hard time creating a scalloped border over an oval in sketch mode. I've watch the screencast ( Scallop edge over circle to extrude)  that showed me how to create one around a circle, but I can't figure out the oval portion.  I appreciate any help with this. Thank you. -Kandis

[aliobidi]

Hi , 

you can make a single body of the pattern then use "pattern on path " tool 
then just use "project tool" all body to have a sketch for the void that created on the center 

[jhackney1972 · Accepted solution]

As @aliobidi has indicated, the easiest method is using a body development to get the model or sketch you desire.  I am not clear what your final model is as you show a sketch but I think you probably want to end up with a model.  I have attached the model I used in the Screencast in case you want to play with it.

[etfrench]

Equal divisions of an ellipse is an old problem in ornamental turning.  Various mechanical devices have been made.  If you haven't forgotten your calculus from high school you can use a formula. Search "equal division of an ellipse" will turn up quite a few answers to the problem. 

I did it for some rosettes for my rose engine by placing tangent circles with their centers coincident to the ellipse, then changing the diameter parameter until one circle was coincident to the minor axis and another coincident to the major axis.  This gets you to the sub-nanometer range, but isn't technically perfect. 😀

[rubyandwhimsy]

Thank you all for your quick responses. I've been using F360 for only a few days now. I'm definitely going to use that trim tool @jhackney1972 on other projects. I've been making cookie cutters for my bakery and printing them myself. I found the formula for perimeter, worked it, and tried to create an equal chord of contact. I made a quadrant and then mirrored those to save time. Like @etfrench mentioned, it's not exact, but I'm making cookie cutters- not pianos. Thanks again all.