Hi Folk's,
After swapping brush locations (shorter rear to longer front when the
differential was .2 milli-ohms) - the wear stopped on the shorter brushes. the
cross bar measured .2 milli-ohms between the brushes and a long new brush
measured .6 milli-ohms. So I waited for about 2K miles when the rear brushes
got down to .4 milli-ohms (2/3rds) and swapped to the front so now .4 + .2 = .6
milli-ohms same as the long one's which are now on the rear. I measured with
calipers and no noticeable further wear in the last 2 weeks of 700 miles (was
.3" per week). Yeah!
Of course the solution is symetrical brush rigging which i'll fix before I
install a new set of equal length 8 brushes on the Warp-9" Impulse (made 2011).
Move the main bolt feed arm bar to the center and add another buss bar on the
inside comm around (for both sides.) Smashed flat copper water pipe 1/2" works
well.
Have an even brush wear day,
Mark in Roanoke, VA
www.REEVA.info community service RE & EV's
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