Subject:
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Re: Motor control
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 18 Mar 1996 17:55:00 GMT
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Original-From:
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Barthelet, Luc <lucb@ea.com%StopSpam%>
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Viewed:
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1974 times
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I like 0 to 8 better.
Also is there any way to control the frequency at which the PWM works?
I find that some of my motors deliver too much at step 1.
How about if there was something like:
motor( motornum, cycles_on, total_cyles);
if you feed total_cycles=8, you would have the same as the current (I
suppose), but you could control the power more smoothly by feeding different
frequencies.
thx.
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- - - - - - - - - - - - - - - - - - - - REPLY FROM: Barthelet, Luc
Return-Path: <fredm@media.mit.edu>
Message-Id: <9603160604.AA19732@aleve.media.mit.edu>
To: MAR ERICSON <mar@cooper.edu>
Cc: handyboard@media.mit.edu
Subject: Re: Motor control
In-Reply-To: Your message of "Fri, 15 Mar 96 16:04:39 EST."
<199603152104.AA13133@zeus.cooper.edu>
Date: Sat, 16 Mar 96 01:04:35 -0500
From: "Fred G. Martin" <fredm@media.mit.edu>
X-Mts: smtp
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> I'm not to familiar with the motor chips. Does the handyboard
> allow for speed control of motors?
Yes, and speed control is built in to the Interactive C motor
function. motor(0, 100) turns on motor 0 at full speed; motor(0, 50)
is half speed, etc.
While we're on the topic, I am considering changing the speed
argument, because in actuality there are only eight discrete power
levels from off to full on, so having the speed argument range from 0
to 8 might make more sense than 0 to 100.
do people have any comments on this? the problem i see with 0 to 100
is that you don't know exactly where the power steps are, and this
could be a nuisance in some applications. i think randy and i chose
100 as the top end of the speed range because it's a nice round
number, but i am thinking it would be better to expose rather than
hide the discrete nature of the speed control (i.e., the eight
discrete power levels).
any reaction?
-fred
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