Re: (ET) Ok, my E20 is insane

["RJ Kanary" <rjkanary nauticom net>]

    If you E-20 is an AA or BA model , or even an early CA,{Eight motor
speeds, instead of seven. } ,  I would suspect the edge card connector has
split apart . Intermittants in this area will drive YOU insane ? <G>

----- Original Message ----- 
From: "Chris Zach" <czach computer org>
To: "Elec-trak list" <elec-trak cosmos phy tufts edu>
Sent: Thursday, July 29, 2004 9:31 PM
Subject: (ET) Ok, my E20 is insane


> Ok, this is really weird.
>
> Right now my E20 is in an odd place. If you put it in neutral and press
> down on the pedal, the motor comes up to full speed immediately. That's
> on throttle setting 1.
>
> Go to setting two. You hear a click, but the motor spins at the same
> speed. Same with setting 3 and 4. A click each time from the contactors
> but no change in motor speed. Speed 4 is normally full armature, full
field.
>
> In speed 5,6,7,8 you can hear the motor speed up. Wahoo; we're running
> with proper field weakening. But it's almost as if cruise control is
> halfway engaged in the lower speeds, locking in all contactors. Except
> that the contactors are clicking in; you can hear them. They're not
> locked on.
>
> It gets worse. Switch to reverse. Now you will hear the motor spinning
> backwards slowly thru the gears, however there is *NO* field to speak of
> as the armature current is way off the chart. And after a few seconds
> the motor thermal breaker trips.
>
> Any idea what the heck is going on here?
>
> Chris
>
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