Re: (ET) Strange Alltrax behavior

["David Roden" <etpost drmm net>]

On 18 Jul 2019 at 14:50, Jim Coate wrote:

> This is on the off chance that the controller is just fine and the 
> wiring to the other side of the coil is flakey.

The puzzler here is that the tractor will run the first time he hits the 
pedal after starting the controller up cold.  Once he lets off the pedal, 
the contactor drops out normally but then won't pull in again until he 
shuts 
the controller down for about 15 minutes.

I'm no EE, but this suggests to me that maybe some RC timing circuit isn't 
discharging its cap at the right rate.  Shut the controller down for a 
while, and the charge bleeds off enough to get another (single) accelerate-
stop cycle in.

I might be tempted to disconnect the motor and replace it with a light 
bulb 
for safe testing, and then try bypassing the contactor to see what 
happens.  
Chances are that the controller itself won't start up, though.


David Roden - Akron, Ohio, USA

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