How would you cut these scallops?

[JuanMarch]

I'm trying to cut the axial scallops in this part on a 3 axis machine, using a lollipop mill.  

I'm having trouble figuring out which operation to use.  A circular patterned Trace results in code that attempts to to tilt the z axis, which isn't an option on my machine.  I'd like to approach the scallops from the top if possible, although I suppose I could use a drill to remove that material before working on the top of the part.  

Any ideas?  Thank you!

Result of circular patterned trace:

[Anonymous]

Get correct size lollipop tool.

Sketch and offset one arc and one line so that intersection point represents center of the tool and offset equals tool radius.

Program one path in trace to follow line and arc with tool on center.

Do pattern for line and arc.

Set offset for lollipop tool in machine so that tool path is in sink with programmed point, center of the tool.

Cut the pattern in each direction.

[Anonymous]

Hmmm,....... wait, don't push cycle start yet. 

My mistake, you can only do pattern for arc moves, strait lines have to be sketched for each cut because each line  changes position on arc.

You can define lollipop tool as .001 diameter or use spot drill with zero point width, that will produce tool path, you won't see any stock removal in simulation but with correct tool diameter, sketch and programmed tool path you'll see it on work piece. 

This assumes scallops are oriented in line with Z axis of vertical mill, use ball end mill to prep arc surface..

You can orient part in different position but same process would have to be employed.

If you can share file, I'd be willing to take a crack at it just for entertainment.

[JuanMarch · Accepted solution]

Thanks a lot for your input and suggestions!  I was able to get it using a 3D sketch and Trace.  

The sketch.  Just projected the geometry of each scallop and constrained the end of each line to the center point of the scallop.

The tool path.  Still could use a little refining, but this works.  I also had to axially offset the tool by -.125 such that the center point of the .250" lollipop "sphere" was at the center of the scallop.

Thanks again!