How do I undercut this?

[christopher.leblanc]

  How exactly do I cut this undercut?  I have a 117 degree tool, I just can't get fusion to let me cut it.

[marcus.toepke]

Maybe this way:

I have edited the holder setup angle and the holder hight and the holder form

[christopher.leblanc]

  I'll be honest, I didn't even know you could change the angles like that, I thought it was just 0,90,etc..  but I tweaked my tool holder little, while I don't think I'm quite there yet, its getting close.  Usually I can figure stuff like this out, it's just one of those weird tools.  Support in this forms is always great and helpful though.  

[a.laasW8M6T]

Hi

A 117.5degree holder like this:

needs to be defined in fusion like this:

The 27.5 degrees comes from 117.5-90 as fusion defines the tool angles different to the tool manufacturer in this case.

You will still need to tilt your tool angle in the setup like @marcus.toepke  showed as the angle you are trying to machine is 30° from 90° and the tool sitting normally in the machine is 27.5°

[marcus.toepke]

In my opinion, Autodesk still needs to make improvements in turning!

You simply have to make too many compromises in the area of turning.

If I see things like:

The hairs on the back of my neck stand on end 😉

[a.laasW8M6T]

Improvements to toolholders are coming (So is Christmas haha),

I haven't really bothered using Fusion for turning in 6 years, We just program everything conversational on our lathes but they are basic 2 axis "Teach" lathes.

We are getting a Mazak QT350MY in a month or so so will be trying to use Fusion a bit more, but I'm hesitant to until stuff like 3D toolholders gets implemented.

I will try an use Mazatrol a lot to start with to learn how that works, then maybe move to Fusion(If it makes sense)

[christopher.leblanc]

  Yeah, tool holder setup is always the issue with odd tooling.  To be honest I tried the 30 degree positioning and its working fine so I left it like that, I know I tried defining it -117/27 didn't work and I think I tried -27/27 still wasn't cutting correctly.  What fusion needs added is better turning tool library setup.  A lot of these holders should be predefined so that when you get a 117.5/27.5 holder you just select it, and run.  At least I would love to see that, mill work was so much easier of me and I learned everything mostly just by playing with it on the job.  I guess mill wise stuff to a degree no matter what, lathe it either works or it doesn't.  I prefer mill work over lathe work any day.

[Christoph_360]

Hello

If you have a Mill/Turn machine with a B-Axis, there could be another possibility.

Define the tool neutrally in the Tool Library.

Enter the Angle of the Tool Orientation in the Operation.

What I don't know, however, is whether there is already a Postprocessor that supports the B-Axis.

I tried the Siemens Mill/Turn, but it doesn't produce any output for the B-Axis.

Thanks

Mfg

Christoph