Subject:
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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 15:17:31 GMT
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Original-From:
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Camp0s <CAMP0S@LIBERO.antispamIT>
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Viewed:
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805 times
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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 (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 ?
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) ?
Greetings,
Camp0s.
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Message has 1 Reply:
 | | Re: About Stop and Float mode
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| (...) Yes - that's it - it might not be an open contact though - but a high resistance of some kind. (...) This seems a dangerous thing to do (for the health of the RCX). ---...--- Steve Baker ---...--- HomeEmail: <sjbaker1@airmail.net> WorkEmail: (...) (22 years ago, 20-Oct-02, to lugnet.robotics)
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