On Fri, Apr 27, 2018 at 3:35 PM, Lee Hart via EV <[email protected]> wrote: > fred via EV wrote: >> >> I have a Gizmo EV which uses a 10" Sepex motor. > > > That doesn't sound like the original motor. I worked on Gizmos many moons > ago, and as I recall they had D&D 6.7" series motors, and Alltrax > controllers. >
Fred's Gizmo was built nearly identical to the Gizmo I had. It has a Sevcon SepEx PP745 controller and the ES10C is the D&D 6.7" SepEx motor. >> More recently, the Gizmo has been sitting idle. Perhaps someone can tell >> me why it feels as though it is cogging at low speed, even though it didn't >> use to do that. At higher speeds, the jitter and jumping goes away, but the >> low speed regime is from zero to about 20 mph and is painful to experience. >> I've been told from one of the Gizmo group denizens that when/if I fix the >> jitter, it would be wise to take a spin every two weeks or so to keep the >> jitters away. Would the commutator oxide over non-use and cause this >> problem? I experienced the same thing with mine. I found with driving it a while it smoothed out. Of course my hill climbing and 50mph driving worked the motor harder than what yours usually got on the flat FL roads. On one of the motors from one of the Gizmos I'm sure Lee Hart worked on, after it sat a while, while I was working on restoring the Gizmo, the brushes ended up seizing from lack of motion. Before I sold it I had to free them up and clean out the brush guides. It worked just fine after that and the new owner drove it quite a while before selling it. -- David D. Nelson The Gizmo I owned is listed at http://evalbum.com/1328 _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
