Re: Tachometer and Transmission Issues

On Wed, Jul 1, 2009 at 5:55 AM, Pestka, Dennis
J<Dennis.Pestka@...> wrote:
> First is with my tachometer.
> Purchased the 3" electric tach, sensor, and magnetic collar from
> EVparts.
> When I step on the accelerator, it immediately buries the tach at the
> maximum 7000 rpm.

Your problem is likely that the tach is picking up noise from the
controller's PWM.

You probably need to use a shielded cable from the sensor to the tach
module itself.  In my case I used a piece of headphone cable (two
conductors surrounded by a shield) with the shield ground to the
chassis on only one end.

Mark Farver

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