milling at a .5 draft angle

[rfuentes]

i am trying to mill this boss at a .5 draft angle and need help setting my set up origin. It does not detect the feature.do i have to create some geometry and reference of that ?also which 3d strategy would i use to machine the wavy contour? i will be using a .010 end mill and a .010 ball end mill on a 3+2 axis mill

[Muppett1]

As the draft angle is a negative value, you will need to use a "lollipop" style, or side milling keyseat type cutter to perform the undercut strategy I'm thinking, as you will need some clearance away from the shaft of the cutter to allow it to machine the undercut portion.  Zlev finish with undercuts should perform as the strategy.  I haven't tried it, just my initial observation.

[kelbie.ockey]

Agreed w/ @Muppett1 on the undercut. Z-level undercut and flowline will be your only real options there.

You mentioned that your machine is 3+2, so it sounds like full simultaneous is not an option. If it were, the top piece could be very easily swarfed. Seeing as it is not, the z-level or flowline route may be necessary. If the draft angle were positive .5, creating a curve and side feature would definitely be the easiest method. It looks like it's negative however, so it's not going to be that easy. 

As for the wavy portion, I played with a few options, and just a simple z-level continuous spiral path with a reduced tolerance and output options seemed to return a pretty nice result. See attached.

Hopefully, this is somewhat helpful. Like I said, if you can do simultaneous, just swarf that top bit. Otherwise, it's going to be rather difficult.

[rfuentes]

kelby,

I provided you with some misinformation, we have a 4+1 not a 3+2.  Can the top be done using swarf? also is possible to tilt the indexer and machine using x and y instead of using 3d profiling?