Re: NIST EMC Software

On Sat, 15 May 1999 10:50:47 -0500, you wrote:

>From: Dan Falck <dfalck@...>
>
>This is directed to Jon Elson, who is using the Nist EMC CNC package, but
>should be of interest to all.
>
>Jon,
>
>Will you, theoretically, be able to sync the spindle of your mill to the
>Z-axis? Thread milling and lathe conversions are what I am interested in
>on this subject.
>
>My next question is to Dan Mauch:
>
>Dan ,
>
>Have you looked at the Nist EMC package? They now have a step and
>direction version that would work with the servo system that you have (it
>takes step and direction pulses for input).
>
>My last question is to the group:
>
>Who on the list is using the Nist EMC package?
>
>My interest in the package is this: I have used Dancam , Stepster, and now
>Maxnc software to control my small milling machines. These packages are
>fine for the price, but the Nist package is free and looks very powerful.
>It seems to take most G-codes that I am familiar with - many more than
>Maxnc and Stepster. The source code is available for the programmers in
>the group. It runs in RT Linux, which I am told is good (I am a newby to
>Linux). Fred Proctor and the Nist group seem to be pretty quick to fix
>bugs and add features. It seems like you can run it via network, with
>another machine running the GUI, while the controller can run on another
>machine- so that you could use Windows or Xwindows to make it look good to
>the user. I am just speculating on some of this, (since I have yet to set
>it up, but will try this week). I would like to start a discussion on it here.
>
>Thanks,
>
>Dan
>

Could someone please post a site for this EMC package??

As regards thread milling on a miller you don't need to sync the spindle to the
Z axis.
All you need is to lower the Z axis in time with one circular interpolation.
The AHHA controller has a canned cycle for this
G14 I.....K.....L.....F.....

Where I=Radius, K=lead, L=No of repitions, and F=feed.
For a tool I use one piece out of a coventry die head that has the same number
of teeth [ K ] that I need mounted in a holder.

Regards,
John Stevenson
Nottingham, England