Subject:
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Re: dual servos
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 16 Jan 1997 04:18:19 GMT
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Original-From:
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Fred G. Martin <fredm@^spamless^media.mit.edu>
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Viewed:
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1540 times
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There may be two separable issues in your experiment:
1. "twitching" when the control value isn't changing. this should
not happen.
2. twitching because of flakiness in the pot reading. this would not
surprise me at all. if the A to D reading on the pot flips between
two adjacent readings, you'll probably get a lot of servo twitching,
which wouldn't be the fault of the drivers at all.
-fred
In your message you said:
> Greetings all,
>
> I have been programming lately using the recently released dual servo
> routines. I have noticed that if I enable both servos and simply send each o • f
> them a pulse (servo_a7(or 5)_pulse=3040 for example) they respond faitfully b • ut
> then twitch almost imperceptibley every few seconds. The twitch does not see • m
> to favor either servo, and they both twitch at the same time. This is no big
> deal. However I have a program that uses analog input from a potentiometer to
> determine a servo pulse value several times a second, and this routine makes
> the twitching a serious control issue. I am running the servos off their own
> 6V supply, so I don't think that I am overtaxing any parts on the board. Any
> ideas or similar experiences?
>
> Thank you,
>
> Dave
>
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Message is in Reply To:
 | | dual servos
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| Greetings all, I have been programming lately using the recently released dual servo routines. I have noticed that if I enable both servos and simply send each of them a pulse (servo_a7(or 5)_pulse=3040 for example) they respond faitfully but then (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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