Has anybody cut an off center diameter with a CNC Lathe?

[Guest MTB Technical Services]

Tim - any issues with beating the thrust bearings out doing this?

I'm assuming it's rpm limited depending upon servo response?

 

That's going to depend on the machine itself.

It's a neat thing to do but it's really more of a parlor trick than something you'd actually use for making something.

 

Rope threads and the like are another matter.

[cherokeechief79]

thanks for the code sample.

forgive me if im wrong but ive never done anything like this before.

my question is that it output xz and c.

does that mean it was actually in a mill mode rather than a lathe type mode?

are you limited in rpm to the feed of the c axis?

[Guest]

.

thanks for the codIS sample.
forgive me if im wrong but ive never done anything like this before.
my question is that it output xz and c.


does that mean it was actually in a mill mode rather than a lathe type mode?
are you limited in rpm to the feed of the c axis?

Set NCplot to mill. C axis around Z and reverse spindle rotation. Coordinate resolution 1.0 and select take shortest path to endpoint.

 

The axis are synchronized but the c-axis is not usually the limiting factor, at least not for the parts we are machining. We are usually requested to hold some fairly tight tolerances so things slow down a bit in order to keep the following error on the machine below 100nm. For parts with more relaxed tolerances  RPMs might hit the low hundreds with feedrates up to about 8-900mm/min. That is probably horribly slow compared to what most people are running here but for us, that's screaming along.