Mastercam Lathe roughing between goal posts with R and L tools?

[gcode]

I emailed a file
the clearance on the back of the 3D holders could be defined a little better
but they will not be able to machine the entire part
The inspection cycle is set to 2 passes but some off the cuts are very short.
Once you have a feel for the tool life, I'd change it to "time in cut"
the default 2D lathe post is posting the inspection cycle correctly, but that doesn't mean the real post will

[neurosis]

the clearance on the back of the 3D holders could be defined a little better

Yea.. It seems like it just runs the clearance angle on the back of the holder out in to infinity. It does that on the default tool library tools as well. It won't recognize that the tool can fit between the right goal post and the remaining stock (when I do this in levels) and just follows that clearance angle all the way down for every pass and level. 

[neurosis]

Only a suspicion on my part but I 'think" it might be a legacy of lathe "before" stock recognition. Still works though

I was able to open this and look at it this morning.

It looks like it still makes air passes and pretty much does the same thing the std tools do and walks down the clearance angle the deeper in to the part you get. At least you got it to create the path.  That's more than we could do.

I'm starting to have my doubts as to whether this is going to be capable of doing what we're looking for.

G used the inspection function, which worked OK, but it doesn't allow for the entire shape of the part to be roughed and also walks down that clearance angle.

We have a friend, lathe programmer I've known for 30+ years, looking at it in Gibbs.  He said that he was able to get it to work in Gibbs but it also took some tinkering.

I can get it to work with a LOT less effort in TS, but TS also chokes in a couple of areas after you get about 4 levels deep in to the part. 

I don't know if this is something worth sending in to Mastercams QC department?  This seems like it should be a LOT easier than it is.

[JParis]

It might be, eyah..

Side note, poor tool choice IMNSHO

For a cut like that I would 100% use a single button cutter, straight instead of the "C" style holders.

[neurosis]

It might be, eyah..

Side note, poor tool choice IMNSHO

For a cut like that I would 100% use a single button cutter, straight instead of the "C" style holders.

I believe the reason they selected these particular holders was rigidity. The holder has to stick out a bit and the material being solution treated 718 Inconel, the setup has to be as rigid as possible. Also, this is a recommendation from a tool salesman so.. I think this is their first attempt at running ceramics in Inconel. 

I suggested the same "straight rather than C style" but they didn't want to chance it. I don't work in that area so I have limited input. Are there straight button type holders that are rigid enough to run ceramic inserts that have to hang out a little over 1.5"?  I would imagine that with a straight tool, they could take advantage of dynamic turning?

[JParis]

I have not turned Inco since about '95....if I had to do it today, Greenleaf would be my first check in...

[gcode]

I have not turned Inco since about '95....if I had to do it today, Greenleaf would be my first check in...

farm it out to a job shop

fissed for reality 

[JParis]

farm it out to a job shop

fissed for reality 

For what we have for machinery, I agree...

The tooling side doesn't worry me, I can adapt to the changes pretty quickly if I needed to...guessing Greenleaf isn't the "goto" they perhaps used to be?

[Jeff]

I suggested the same "straight rather than C style" but they didn't want to chance it.

Seems like with a neutral style tool they could use the Dynamic Roughing path, no?

[Tryon]

+1 Jeff

Are they trying to pinch turn it?

Can they pinch turn it?

Break the chain at center, upper does the right side and lower does the left side.  Start the chains at the OD and use dynamic rough with Full nose radius groove tool.