Subject:
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Re: Servo Motor Control
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 29 Dec 2004 14:01:02 GMT
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Viewed:
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1309 times
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"Dick Swan" <dickswan@sbcglobal.net> wrote:
> You don't need to use servos. If you've got a rotation sensor and a
> spare sensor port, you can get extremely fine position control with the
> new firmware. I've got a small PID control demo using the new firmware
> using a motor and rotation sensor. The PID program smoothly accelerates
> and decelerates the motor to reach any desired rotation count value. It
> works without any overshoot! I've geared the rotation sensor 1:5 so
> that I get 80 counts per revolution of the main shaft. The motor is
> connected to the shaft with 1:1 gearing. I get position accuracy within
> one count with the shaft rotating at 5 revolutions per second (i.e. full
> motor speed). A practical application would surely gear the shaft down .
> I suspect this is far finer resolution than you can get with a SERVO. I
> hope to post a video of this soon.
Dick,
I am very eager to see this! For a long time, I've been trying to do
exactly this with limited success. Can you elaborate a bit on what you did
code-wise to achieve this?
Iain
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Message is in Reply To:
 | | Servo Motor Control
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| "danny" <daniele_benedettelli@yahoo.it> wrote in message news:I9BszE.1KF0@lugnet.com... (...) No. It doesn't appear that it will be possible to directly control a servo. Servos are controlled by a single variable width pulse repetitively sent about (...) (20 years ago, 27-Dec-04, to lugnet.robotics)
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