Re: Enable Circuit...How it Works

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

>
>     I don't agree with this. I have seen curtis controllers go into
>high pedal disable when the the enable was tied to V+ and not going thru
>a microswitch. The Curtis manual says that the controller looks for a
>high throttle position after a delay after the cotroller is turned on.
>So it should not matter if the enable is tied directly to V+ and in my
>experience, it doesn't. The High pedal disable still functions. I do
>think it is a good idea to use the potbox microswitch, though.

        Read carefully. There are TWO separate issues. One is a partial
throttle on startup. The other is "high pot lock-out."

        The partial throttle on start-up is disabled ONLY on CURTIS by
connecting the enable to V+ during start-up. It is always active on Auburn.

        A "high pot lock-out" is a different animal. I know that Auburn
controllers continuously check to see if the pot resistance is much hgher
than "full" throttle. I believe Curtis controllers do this too. This feature
is always present no matter what you do with the enable line on Auburn and I
believe that is the case on Curtis too.


 Bill Dube'

 bdube@boulder.nist.gov

Re: Enable Circuit...How it Works