I looked at Marco's Youtube video and even with my poor understanding of Spanish, I can understand how the Pot works. Look at all the other videos he has, pretty soon he's going to have a whole conversion up. And it seems from the numbers of viewers that the videos are being seen.
Here's a link to his Youtube home https://www.youtube.com/channel/UCN6-hc0_MzqmxbCLmt6Pm7g Rush Tucson AZ > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Ing. Marco Gaxiola via EV > Sent: Friday, February 13, 2015 12:57 PM > To: 'Electric Vehicle Discussion List' > Subject: Re: [EVDL] PB-6 Extra Wire > > 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)
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