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Discussion Starter #1
I'm looking at putting a tachometer in my 1965 Datsun Truck, and have a
question on the wiring.
Looking at EVparts, the wiring loom has 3 wires, +, -, tach, and the
pickup sensor.
Diagrams I have show + and "tach" to the tach, with - coming off the
tach to ground.
Sensor is mounted to pickup the magnetic collar on the motor shaft
opposite the drive end.
My Raptor controller has a terminal labeled Tachometer.
Which wire needs to go to that terminal?

Also, any good techniques for mounting the pickup sensor.
I'm using a 9" Advanced motor.

Thanks;
Dennis

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70 Posts
Discussion Starter #2
Hello Dennis,

The EV Parts sensor, if you talking about the collar that holds the magnets
that clamp on the pilot shaft of a motor, is design to run the tack
directly. I could not use this sensor on my Zilla which also has a tach
output because I think it is a two pulse output according what Otmar said.

Some tachs may need only one magnet while others need two or four magnets.
My Zilla requires four magnets sense input and my existing tach can work on
a four sense input also. There are some tachs that only require one magnet
pick up which counts 1 turn and converts its to number of turns per minute
for a output reading of RPM.

I could not put the standard pickup sensor on my GE motor pilot shaft which
is driving a rotating DC-DC-DC-AC inverter converter which is also use for
REGEN. I was able to drill four 1/4 inch holes about 90 degrees apart on
the coupler and press in neo magnets for a four pulse sensors. A magnetic
pick sensor or even a sensor switch that is use to detect window or doors
opening in alarm systems works. I use a small round 5/16 inch diameter
ones, that I press into a aluminum bracket that is bolted to one of the
tapped bolt holes on the front of the motor.

These sensors are a two wire type, 12 volt in, and a pulse 12 volt out which
is the sense wire for connecting directly to a tach sense input. A fuse
ignition control 12+ goes to the tack 12+ input and the 12- is the 12 volt
ground which also is use to ground to the two wire sensor wire ground
shield. Only connect this ground shield to the metal bracket that holes the
sensor pick up and the other end of the shield to the tach 12- which is also
connected to the 12 volt negative.

Some tachs like a Stewart Warner tachs have a selector switch on the back to
either select 4, 6, or 8 cylinders. If I was using a Zilla tach output, I
would have to use the 4 cylinder selection.

Roland


----- Original Message -----
From: "Pestka, Dennis J" <[email protected]>
To: <[email protected]>
Sent: Wednesday, October 10, 2007 6:05 AM
Subject: [EVDL] Tachometer Wiring


> I'm looking at putting a tachometer in my 1965 Datsun Truck, and have a
> question on the wiring.
> Looking at EVparts, the wiring loom has 3 wires, +, -, tach, and the
> pickup sensor.
> Diagrams I have show + and "tach" to the tach, with - coming off the
> tach to ground.
> Sensor is mounted to pickup the magnetic collar on the motor shaft
> opposite the drive end.
> My Raptor controller has a terminal labeled Tachometer.
> Which wire needs to go to that terminal?
>
> Also, any good techniques for mounting the pickup sensor.
> I'm using a 9" Advanced motor.
>
> Thanks;
> Dennis
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 
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