[EVDL] Pot Box

Hello Dave,

Check your controller data to see how much ohms range you need with a
potentiometer. Normally these are from 0 to 5000 ohms. A Curtis pot box
only needs to turn 90 degrees for a reading of 0 to 5000 ohms. My
controller does not start turning the motor until the potentiometer is at
about 50 ohms of where I set it for a soft start.

If you want a violent start, then set it at the point where you barely press
the accelerator. This is not recommended as where if the ohms do not go
below the start up point, the motor may not shut down.

Roland


----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, September 03, 2007 8:22 AM
Subject: [EVDL] Pot Box


> I must be missing something...
>
> How do you turn a potentiometer through its normal 270 degrees of rotation
> with an accelerator cable connected to a lever on the pot's shaft?
>
> Thank you,
>
> Dave Delman
> 1981 Electric DeLorean Project
>
>
>
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I can think of a few ways, but it is probably easier just to get the
right pot.

An idler that when turned 90 degrees has a 2" diameter drum pulling
1.57" of cable. This is wrapped around a 5/8" drum.

It may be simpler if you have a throttle cable. Measure the cable pull
length. Maybe change the leverage at the pedal to pull more cable then
wrap it around the appropriate sized drum.

or a 3:1 gear reduction, or chain. I use to have the perfect type of
stuff in my junk drawer from copier parts. A hobby shop may be the
answer (think battle bot hardware and RC car chain and sprocket.)

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