Re: Auburn Contoller question

["Bill Dube'" <bdube@BOULDER.NIST.GOV>]

>Bill Dube' wrote:
>>
>>         The enable wire is truely a marvelous thing. Used correctly, it is
>> an important safety feature. Unlike a Curtis, you can simple tie the enable
>> wire to V+ if you care to and forget all about it. You can run it to the
>> switch on your pot box if you like. This will reduce the chances that power
>> will flow with your foot off of the pedal. You can use the enable wire to
>> kill the power with a rev limitier if you like. Some folks prefer the main
>> contactor for this purpose, however.
>
>Bill,
>     How is this any different than what you can do with a Curtis?

        It's very similar, but not identical. On a Auburn, if you care to,
you can wire the enable directly to V+. The controller will not energize if
the throttle is greater than about 10% open. The controller will shut down
if the pot reads much greater than 5,000 ohms.

        You are smart if you wire the enable to the switch on the pot box so
that the connection is broken when the throttle is off.

        On a Curtis, If you wire the enable directly to V+ the controller
will start up even if the throttle is wide open. If you don't use the switch
in the pot box to break the enable circuit at zero throttle, there is no
protection from a "launch" when you close the contactor. For the safety
feature to work correctly, the sequence (in a Curtis) must be: 1) enable
off, 2) precharge, 3) contactor closed, 4) throttle at zero position, 5)
enable on.


             _   /|
             \'o.O'              Bill Dube'
           =(___)=           bdube@boulder.nist.gov
              U

Re: Auburn Contoller question