RE: multiple block MDI entry

[Donald Kelley <dkelley-at-wilson.edu>]

All,
	Is it possible to get an electronic copy of the RS274D standard from
anyone.
I would like to have a copy and it might also be nice to have on the
website.

thanks,
don kelley
dkelley-at-wilson.edu


> -----Original Message-----
> From:	Ray Henry [SMTP:rehenry-at-up.net]
> Sent:	Monday, January 24, 2000 11:09 PM
> To:	Multiple recipients of list
> Subject:	Re: multiple block MDI entry
> 
> 
> Jon
> 
> Thanks for the spindle info.  It sounds worse than I imagined.
> 
> If I read the RS274NGC files correctly, emc does something with inverse
> time but not with constant surface speed. I was trying to figure out how
> to
> use inverse time as an imitation.
> 
> 
> Ray
> 
> At 07:33 PM 1/24/2000 -0500, Jon E. wrote:
> >
> >The standard EMC supports a horrible arrangement where there are solenoid
> valves
> >that operate an air motor that changes the variable speed belt setting on
> a
> >Bridgeport
> >2J head.  At least some of the code for spindle speed setting through the
> >interpreter
> >is there.  Generally, an S word would send a spindle speed change command
> through
> >to the motion stuff, which could set a DAC channel to whatever % or max
> RPM
> >that worked out to.  Getting commanded speed out to the UI should not be
> tough.
> >There is no code at all to MEASURE spindle speed and report it.  If you
> had an
> >encoder on the spindle, it might be possible to use the encoder counter
> to
> count
> >revolutions pretty easily, and convert to RPM.
> >
> >There are RS-274D commands to set spindle speed to obtain constant
> surface
> >speed when turning.  I don't know if any of this has been implemented,
> either.
> 
> 
>