Re: multiple block MDI entry

[Ray Henry <rehenry-at-up.net>]

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.