Subject:
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Re: motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 6 Jun 1998 07:44:41 GMT
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Original-From:
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John Wong <u2174730@ee.AVOIDSPAMunsw.edu.au>
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Viewed:
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2137 times
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For servo, there is a certain threshold duty cycle (say 50%) of the PWM
signal, where anything above this threshold will make it to run forward,
and less will make it to run backward. So, you still need to apply the PWM
even if the servo is not moving.
And this is because servo is originally used for moving at certain amount
of angle, once it is modified as a driving unit, that angular feedback
device within the servo will also be modified. And the detail of how it
works has somthing to do with the threshold duty cycle. Please correct me
if I am wrong, as I am also thinking about using dc motor or servo.
John
At 06:25 PM 6/5/98 -0500, Chris Rhodes wrote:
> That did answer my question. I am not familiar with servo motors, I
> have only used plain DC motors. I am also familiar with PWM. I was
> just unable to determine if the same PWM signal that drives plain DC
> motors could also drive servo motors. From what I understand a servo
> motor and DC motor use PWM to control the speed, and if that is the case
> I did not see the difference in using the same PWM signal that drives a
> DC motor to also drive a servo motor. Thank you for all of your help.
> If I stated anything incorrectly in this paragraph please correct me.
>
> Chris
>
>
>
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Message is in Reply To:
 | | motors
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| That did answer my question. I am not familiar with servo motors, I have only used plain DC motors. I am also familiar with PWM. I was just unable to determine if the same PWM signal that drives plain DC motors could also drive servo motors. From (...) (27 years ago, 5-Jun-98, to lugnet.robotics.handyboard)
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