Re: [CAD_CAM_EDM_DRO] DIY brushless controllers?

I wonder what the maximum step generation rate would be for the PIC
brush type controller ?

Kim

On Tue, 2003-12-16 at 11:47, bluecoast@... wrote:
> Hi again,
>
> Has anybody taken a crack at homebrewed brushless controllers? I
> notice Microchip has two interesting appnotes that could be used for
> this:
>
> Brushless DC motor control made easy (speed-torque control)
> (http://www.microchip.com/1010/suppdoc/appnote/all/an857/index.htm
>
> PIC16XXXX/18XXXX DC Servomotor (brushed position control)
> http://www.microchip.com/1010/suppdoc/appnote/all/an696/index.htm
>
> So a position controller would be basically a combination of these
> two applications... the second addresses optical encoder up/down
> count; the first the pwm sinusoidal generation to drive the actual
> brushless motor.
>
> Has anybody seen or experimented with these?
>
> Microchip also has some other neat app notes about brushed servo
> control, and one cool sinusoidal microstepping drive.
>
> I just wanted to get talking about brushless drives and pitfalls
> with them since there aren't so many options for us as opposed to
> brushed/stepper etc.
>
> Cheers,
> Andrew
>
>
>
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
> Moderator: pentam@... indigo_red@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> 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 to be 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........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
--
Kim Lux <lux@...>