There is one video I uploaded to my customers from my store, I made it to explain my Mexican customers how this work (Spanish), but you can see exactly how those 3 wires works. As lee Hart says; connecting the pot ends would give you a maximum resistance on the center and 0ohm on when turning it on each side. Not a popular connection on EVs.
https://www.youtube.com/watch?v=L-63p-MA3UE Usually the 3 wires Pots are used for electronics where there is needed to have a positive and negative references for making the 'wing' process, from an 'X' specific voltage to another 'y' different than ground or ground too. For almost any EV controller you should only require one side and the center, depending on the controller input logic; from 0 to 5K ohm or from 5K to 0ohm. Other outgoing wires, if the PB-6 keeps original; only can be the micro-switch (that is 3 leads in it) for certain controllers as confirmation of 'end/start of track' or force to off mode in case the pot inside track fails or there is a false contact on the pot wiring. Ing. Marco Gaxiola CEO/Director Juarez #18, Col. Bachoco Tel: +52(662)301.1070 Skype: info.energyev www.energyev.com -----Mensaje original----- De: EV [mailto:ev-boun...@lists.evdl.org] En nombre de Lee Hart via EV Enviado el: viernes, 13 de febrero de 2015 11:21 a.m. Para: Electric Vehicle Discussion List Asunto: Re: [EVDL] PB-6 Extra Wire 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, leeah...@earthlink.net _______________________________________________ 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) --- El software de antivirus Avast ha analizado este correo electrónico en busca de virus. http://www.avast.com _______________________________________________ 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)
