Roland via EV wrote:
Yes, that is right, the second wire went to the wiper, the third wire
went to the other end of the pot. To convert to a 2.5 K Pot, you can
still connect the two ends together.
Something's not right here. If you connect the ends of a 5k pot
together, you end up with a 1.25k pot. As you turn it from one end to
the middle, the resistance would go from 0 to 1.25k. As you keep turning
it to the other end, the resistance goes back DOWN from 1.25k to 0.
Such pots are used in "wig-wag" throttles, where it is spring-loaded in
the center. They use these on electric pallet trucks, for example. You
operate the throttle with your thumb. Pressing it to rotate one way is
forward, pressing it the other way is reverse.
A further complication is that the Curtis pots are weird. Instead of a
resistance track that covers the full 300 degrees of rotation, they had
it printed on only about 90 degrees, with solid metal for the remaining
210 degrees. On this kind of pot, you get 0 to 5k as you rotate it from
0 to 90 degrees (normal throttle usage). But then it STAYS at 5k as you
keep rotating it the other 3/4 of a turn. If you connected a wire to the
far end of this kind of pot, it starts at 5k, decreases from 5k to 0k as
you rotate it 90 degrees, and then STAYS at 0 ohms as you rotate it the
other 3/4 turn.
So I don't know what you really have. But you can figure it out with an
ohmmeter. :-)
--
We live in a society exquisitely dependent on science and technology,
in which hardly anyone knows anything about science and technology.
-- Carl Sagan
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, [email protected]
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
