Re: Lathe CNC retrofit

Marcus,

If your target precision is that tight, you might consider a
different approach.

Convert an aux axis or your topslide/ compound to cnc control.
(depends on your lathe construction; I'm not sure what you have.
Align it parallel to the taper plane. Then it will simply be a LINEAR
move of ONE axis, and no interpolation is necessary.

Otherwise you are making 50 steps, while traveling 10000 with the
other axis (assuming .0001 resolution). Simplify this to 5 steps
every 1000, and further to 1 step every 200. Using a .0001 step size,
you will have 50 steps of .0001 offset, appearing every .02

If you can get away with using an aux axis aligned to the taper, the
precision will come from the axis linear travel. No bumps.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "Marcus & Eva" <implmex@a...> wrote:
> Hi Ballendo:
> Thank you for your input.
> These are very shallow tapers; 1/4 degree, 0.005" in 1", etc etc.
> I need to be competitive in surface quality to cylindrical grinding.
> I'm trying to cut down on formgrinding and on polishing.
> Sounds like servos all right!!
> Cheers
>
> Marcus
>
>