| Hi, I'm not sure how the E20 foot controlled wiring compares to the New Idea 150. On the 150 if I manually engage the reverse switch trigger with a screwdriver and move the "throttle" forward I get 7 speeds in reverse. Seems like replacing the the reverse trigger with a toggle switch for would do the trick. Dean On Feb 2, 2011, at 11:44 AM, Max Hall wrote: I'm a Boston-area guy, so I'm pushing a lot of snow. ("snOMG!" "Snowmageddon!" etc.) And I really wish the higher speeds were available on my E20 for reverse!
I'm looking at the schematics, and it seems as if all one needs to do to have field-weakening for reverse as well as forward is to remove a single conductor on the F&R switch (more specifically, the portion of the F&R switch between P5-3 and P5-2 fed by wires 64 and 22-01) as it is a bypass for all of the field-weakining resistors. It seems as if the high-current lock-out of field weakening would still work, too, (FW coil between card 4 pins 13 and 20 is controlled partly by voltage across a shunt in series with the drive motor) as its circuitry is separate from the F/R stuff.
So: Anyone done this? If so, am I barking up the right tree? Anyone know why I wouldn't want to do this? (Apart from "backing up fast is scary"...)
Thanks, as ever, fellow ETers. Boy, am I working my E20 this winter... love that machine!
_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo.cgi/elec-trak
|