Re: (ET) Odd E-15 problem

["Clean Power Supply" <cleanpower att net>]

 Steve,
 Leaving the wires in place,put your voltmeter leads on the field 
terminals of the drive motor and with the trans. in neutral try running 
the motor,checking for pack voltage.
 Harold Z.
On May 8, 2011 at 6:25pm -0400, you wrote:
>We've got an E-15, powered by a double string of BB600 NiCads, and it has
>developed an odd problem.  When I try to run it (speed 1, gearshift in
>neutral) the motor pulses at about 5 times a second and the current draw
>is very large - almost to the top of the yellow zone.  My first thought
>was no field current, but I get full battery voltage at the field relay
>contacts, and if I disconnect the power and measure the field resistance
>from there, I get 16 ohms, which seems reasonable.
>
>Any ideas?
>
>thanks,
>
>Steve Gaarder
>
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>Elec-trak cosmos phy tufts edu
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