RE: [CAD_CAM_EDM_DRO] Spindle RPM control

if someone where to make some of these, i, for one would be interested in
purchasing! if i understand it right, it would be like a gecko 3XX for a
spindle, right? (but controlling rpm instead of position)--dave l.

-----Original Message-----
From: Tim Goldstein [mailto:timg@...]
Sent: Friday, September 27, 2002 1:03 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Spindle RPM control


It would be quite easy to program a PIC that took in the step and direction
signals from an unused axis and output a PWM signal. What I am thinking is
that you drive the "axis" in one direction to increase the speed and in the
other to decrease it. Think of it just like you were driving a motorized pot
with that axis. The PIC would then continue to put out the PWM signal at the
commanded duty cycle until you move the axis and then it would change.
Tim
[Denver, CO]

----- Original Message -----
From: "Jon Elson" <elson@...>
> The basic idea makes sense, though. But, it will take some amount of
change
> to the code so the code would produce a steady spindle speed. A DAC
> driven by the pc in some manner, so it could be set only when the speed
> needs to change would relieve the load on the CPU.
>
> Jon
>
>
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Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this as a sister
site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........

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