Subject:
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Re: "Servo" Driver for NQC
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 29 Jan 2002 18:14:15 GMT
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Original-From:
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Steve Baker <sjbaker1@NOSPAMairmail.net>
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Reply-To:
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SJBAKER1@AIRMAIL.NETavoidspam
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Viewed:
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880 times
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Rebel Transcanner wrote:
> > I take it you are really doing on...float...on...float cycles
> > with your motor instead of using "off", which actually performs
> > active braking (on/off cycles are almost guaranteed to give serious
> > mechanical jitters).
>
> Nope, I'm using Off, because I need to brake the motor to pulse it. Floating
> it does almost nothing - the inertia of the motor carries it on just as if
> it wsan't powered. To get a low speed using this method, you must Off
> (brake) the motor.
I have to disagree with your approach. Even at low speeds, alternating
between pushing on the gas and stamping on the brake isn't the way to
drive smoothly. Perhaps you need to gear the machine differently and
use less power during the ON cycles - but there is no doubt that you
need to work hard to use FLOAT instead of OFF.
----------------------------- Steve Baker -------------------------------
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Message has 1 Reply:
 | | Re: "Servo" Driver for NQC
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| "Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3C56E677.33FD99...ail.net... (...) Floating (...) if (...) I cannot gear it differently - the geartrain is optimized for the correct speed I must achieve. Float doesn't work because of (...) (23 years ago, 30-Jan-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: "Servo" Driver for NQC
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| "Stephen Edwards" <lego-robotics@crynwr.com> wrote in message news:3C56AA4F.409050....vt.edu... (...) wait (...) Nope, I'm using Off, because I need to brake the motor to pulse it. Floating it does almost nothing - the inertia of the motor carries (...) (23 years ago, 29-Jan-02, to lugnet.robotics)
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