Help with backside Rad undercut

[Guess_who]

I'm looking for some ideas on the best path to finish this backside radii. This will run on a 5axis Jidic. Been trying a bunch of paths but nothing seems to be exactly what I'm looking for.

Oh, I'm running the latest version of  MasterCam 2017

Any ideas? 

 

 

Test.mcam

[mkd]

define backside

 

And just to beat C^millman : Morph between two curves :-)

and either to or from a control point for axis control

[JMahon]

22 minutes ago, mkd said:

define backside

 

And just to beat C^millman : Morph between two curves :-)

and either to or from a control point for axis control

Yep. Good path even if you lock it to 3 axis. Good collision control and lead in/out as well

[Guess_who]

11 hours ago, mkd said:

define backside

 

And just to beat C^millman : Morph between two curves :-)

and either to or from a control point for axis control

Basically, You'd need a full rad keycutter to get to it.  So I'm trying to get the rad on the far side of my tool.

I'll try Morph between curves

 

 

[mkd]

Flowline with gouge checking off will certainly work. Basically use a 3 axis motion on a tilted plane. If you run into flow parameters conflic where you're not able to continuously travel around all the surfaces you can either breakup into multiple flowline toolpath operations that run in the right direction or just goto Morph that WILL get it done in a single operation.

 I used both of these recently to hit some undercuts on a mild 5 axis part that I ran on a Haas 3axis. Just verify and confirm flowline very carefully, as you will likely need to manually edit some little gouges out. (ask me how i know)

[Guess_who]

4 minutes ago, mkd said:

Flowline with gouge checking off will certainly work. Basically use a 3 axis motion on a tilted plane. If you run into flow parameters conflic where you're not able to continuously travel around all the surfaces you can either breakup into multiple flowline toolpath operations that run in the right direction or just goto Morph that WILL get it done in a single operation.

 I used both of these recently to hit some undercuts on a mild 5 axis part that I ran on a Haas 3axis. Just verify and confirm flowline very carefully, as you will likely need to manually edit some little gouges out. (ask me how i know)

Yeah, I find myself breaking up the flowline surfaces a lot. But I think that may be my best option. Thanks.

[Jayson Kramer]

are the UV of the fillet edges causing the tool not to follow all the surfaces along the same direction? If so create edges and create a new surface using swept. Good chance you can get a clean surface. the use use a chain as a Control with Flow 5ax. or do Morph as stated. using the full rad key cutter should work. I like those for this type of work. this picture is a 5 ax undercut in Inconel doing exactly that.

[?Mark]

Jay, I like what you did there. Care to share a sample file?

TIA