Re: [Emc-developers] G71 and friends

[andy p. <bod...@gm...>]

On Fri, 3 Jan 2020 at 19:45, <mar...@he...> wrote:

> Unfortunately I use different letters for almost everything :-(

My remap is built on top of a previous but unfinished experimental branch:
https://github.com/LinuxCNC/linuxcnc/tree/BenPotter/G71

I really want us to stop re-doing this. There have been several
attempts made, and none committed.

My Type-2 version was done in Python mainly because I thought of what
I believed to be a neat algorithm one night, and wanted to try it out.
I consider my only real contribution useful to LinuxCNC to be the manual pages.

> I've taken the Fanuc Series 0/00/0-Mate for Lathe operator's manual
> section 13.2.1 to 13.2.2 as a guide.

I just followed an existing implementation (the one above) and used
all the same letters. I had assumed that it was built on a standard
from a commercial control, possibly Okuma?

I guess that if the letters are different then the images from my
manual pages are not re-usable either.

> I don't do gouge detection, but linuxcnc does it when cutter compensation
> is used.

Does it use the front angle and back angle data? (I could check the
code, of course, but I have just got back from 2 weeks holiday and I
am working through a huge backlog of email and forum posts)

> My cycle only works in the G18 plane, it's for a lathe after all

True, but I chose to generalise my implementation as it is easier to
do that now than later. I can imagine that a multi-slide lathe might
want to use YZ and possibly UZ.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912