Subject:
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Re: I think I fried my board!!
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 7 Jan 1997 15:17:30 GMT
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Original-From:
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Robert McCartney <ROBERT@ENGavoidspam2.UCONN.EDU>
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Viewed:
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2385 times
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keith--
you might have fried the motor ground to logic ground connection.
a couple of times in my lab using 6.270 boards people shorted motor high
to logic ground, with the result being a vaporized trace between the
two grounds (the inductor was not damaged). the resulting problems were
quite subtle, mainly with the servo where the control signal is relative
to logic ground but the ground the servo gets is motor ground. once we
found the problem (very small break),soldering in a wire to reestablish
the connection was sufficient, as no components were damaged.
advice: check for continuity between grounds first. if open, look for
break along the path (including inductor); may be fixable without
removing inductor.
good luck,
r.
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