Subject:
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Re: Servo Routines
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 13 Apr 1998 18:54:30 GMT
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Original-From:
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Bruce A. Moore <bamoore@bloomington.in.usANTISPAM>
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Viewed:
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969 times
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When I see the servo chatter, the knob is returning the same value. In
fact I can just set a constant unchanging value without using the knob and
get the chatter.
I've tried this on two HB's and get the same results. The servos are small
Futabas.
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> From: Fred G. Martin <fredm@media.mit.edu>
> To: Bruce A. Moore <bamoore@bloomington.in.us>
> Cc: handyboard@media.mit.edu
> Subject: Re: Servo Routines
> Date: Monday, April 13, 1998 1:43 PM
>
> can you ascertain whether the knob is returning the same value every
> time through the loop? i wasn't clear if "even when the knob is not
> changing" meant just that you weren't turning the knob, or whether you
> were sure it was always producing the same value.
>
> fred
>
>
>
> In your message you said:
> > Question. I've been playin with the servo routines available from the • HB
> > page. One thing I've noticed. The servo's seem to chatter a lot. Is • this
> > normal. A routine that does nothing but loop, read the knob and • output a
> > value based on the knob to the sevo works well but the servos chatter.
> > Even when the knob is not changing the servo is not still. There are • no
> > other routines running. Just the IC3.2 stuff with this short loop.
> >
> >
> > Bruce A. Moore
> >
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Message has 2 Replies:
 | | Re: Servo Routines
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| I have noticed in my experiments that the HB servo routines don't interact well with the LCD. In order to get them to work reliably in my Handyboard library I redesigned the way the LCD driver worked. Unfortunately for you that library was built for (...) (26 years ago, 14-Apr-98, to lugnet.robotics.handyboard)
| | | Re: Servo Routines
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| Hi all, Futaba servo's chatter when the pulses are not updated quickly enough. At best, this produces a slight buzz, at worst they 'hunt and seek' their position a tiny bit. I don't know how fast the HB routines update the pulse, but standard (...) (26 years ago, 14-Apr-98, to lugnet.robotics.handyboard)
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