Re: [CAD_CAM_EDM_DRO] RS274 vs RS274-NIST

Hi Jerry,

Might be a little more like "did Dave make his G78 function" match the
RS274 NIST, or another "standard". Good write-up in NIST (or one of the
papers) for the Drill cycle. I even tried writing the G81 drill, G82
drill with dwell, and G83 Drill with peck cycles. That takes some
work! I'd study the parameters, and watch the cycles run. You should
be able to observe the pecking cycles go deeper and deeper, and retract
to the appropriate level. You'll also want to observe if G98 (Old Z
retract mode) is implemented. Throw in Absolute or Relative mode on top
of it (makes those 'L' repeats drill a series of holes) and it REALLY
gets complicated! (I'm not sure I've got it ALL working...yet).

I was thinking that a digitizing probe "cycle" might be a good one to
implement! Unless I can find one to copy.. er, implement.

Perhaps Dave can comment on his implementation! (I've heard he's
working on another release).

There is a Gcode list on Yahoo that attempts to collect and compare
Gcodes. Not much activity as of late.

Alan KM6VV


Carol & Jerry Jankura wrote:

>
> Guys,
>
> I've started reading through the NIST release 3 publication, one chapter of
> which describes the operation of the various G-Codes that the NIST system
> supports. It appears that the NIST version supports some codes that my
> controller does not and does not support others that it does. For example,
> NIST uses G83 for "peck" drilling while the controller I'm working wirh,
> TurboCNC uses G78 for what appears to be the same function.
>
> Now, I do understand that there are several "standards" that masquerade as
> RS274. Is the NIST G83 code the same as the TurboCNC G78 code, or are there
> some subtle differences between the two? Are there any other "equivalent"
> codes that port from one machine to another. Would I get the "correct" peck
> drilling cycle if I assigned the G-Code G83 to the same procedure that
> TurboCNC uses for G78? Does any table that lists all of the known G-Codes
> exist? If so, where?
>
> Thanks,
>
> -- Carol & Jerry Jankura
> Strongsville, Ohio
> So many toys, so little time.... (What's a G-Code among friends?)
>