Subject:
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Re: About Stop and Float mode
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 20 Oct 2002 18:44:06 GMT
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Original-From:
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Steve Baker <sjbaker1@*antispam*airmail.net>
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Viewed:
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2399 times
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Camp0s wrote:
> When I set the output to STOP mode, motor have a brake against moving, when
> I set output on FLOAT motor can "coast".
> Ok, until now,
>
> But, electrically, how what is the difference ? i mean, if I set in STOP it
> seems that the motor is connected (shortned) to itself, so if i move it, it
> prodeces current which flow in the opposite direction braking the motor; in
> the FLOAT mode, the motor is connected to the RCX output but the contact
> seems to be "open", so moving the motor a current is generated, but since
> its on a open wire just can't flow and do not stop the motor.
>
> Is this correct ?
Yes - that's it - it might not be an open contact though - but a high
resistance of some kind.
> Because, i connected a battery to the "C" output, setted it in float mode
> and no current was generated; i setted the OUTPUT to STOP, connected a
> resistor between the battery and the output on the RCX and there was a
> (correct) current I=V_battery/R. But, that current was simply flowing "out
> of the battery, round the RCX connector, right back trought the resistor" or
> it was somewhere absorbed from the RCX (maybe overloading the OUTPUT "C"
> port) ?
This seems a dangerous thing to do (for the health of the RCX).
---------------------------- Steve Baker -------------------------
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Message is in Reply To:
 | | About Stop and Float mode
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| When I set the output to STOP mode, motor have a brake against moving, when I set output on FLOAT motor can "coast". Ok, until now, But, electrically, how what is the difference ? i mean, if I set in STOP it seems that the motor is connected (...) (24 years ago, 20-Oct-02, to lugnet.robotics)
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