Re: [CAD_CAM_EDM_DRO] Re: Tapered Threads? Kim's TurboCNC codes

Paul wrote:

>Mark
>
>Threading (or electronic gearing) is far from being a trivial thing to get
>right. With EMC, the changes needed go right to the heart of the realtime
>code.
>
>

Actually, I think I could get lathe threading working with less than 30
minutes
of coding in my PPMC or USC diagnostic programs. Of course, that particular
program option would ONLY do threads, nothing else, and no G-code
involved. The actual electronic gearing function is quite simple,
especially
if you have floating-point arithmetic available.

The real problem is integrating this into a VERY complex structure like EMC,
and handling all the incredibly complex interactions with tool length and
radius compensation, offsets, acceptable machine accelerations, and all the
other details of the possible G-code modes that could affect the operation.
G-code is quite powerful, but the interactions, dependencies and side
effects
all need to be fully thought through before coding.

Jon