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From: morrow@cns8.cns.ucalgary.ca (Bill Morrow)
Subject: Re: PWM DC motor control
Message-ID: <Mar24.205512.52190@acs.ucalgary.ca>
Date: Thu, 24 Mar 1994 20:55:12 GMT
References: <Mar18.181352.31507@acs.ucalgary.ca> <LXeHJc1w165w@sfrsa.com> <Cn5zB9.1Jn@armory.com>
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Richard Steven Walz (rstevew@armory.com) wrote:
: In article <LXeHJc1w165w@sfrsa.com>, Ed Severinghaus <eds@sfrsa.com> wrote:
: >morrow@cns8.cns.ucalgary.ca (Bill Morrow) writes:
: >> 
: >> Is anyone trying to actually vary the driving voltage to the motor,
: >> using some feedback from shaft encoders? You know, just like they 
: >> taught you in that control systems course. It seems to me that this
: -----------------
: That's funny. I took Bill Morrow to mean to use the shaft encode output to
: control the PWM pulse duty cycle or frequency or such. I don't think
: anybody wants an old analog thingy, unless you just want to smooth the
: motor activation with a cap. Did you, Bill?
: -Steve Walz   rstevew@armory.com

Right, use a closed-loop for setting the motor speed. But
keep talking, folks. This is all very informative.

------------------------------------------------------------------------
Bill Morrow    Clinical Neurosciences, University of Calgary
e-mail: morrow@cns.ucalgary.ca voice: (403) 220-6275 fax: (403) 283-8770 
HMRB 105, 3330 Hospital Drive NW Calgary, Alberta, CANADA T2N 4N1
