REFLECTOR: Mag timing
Brian Michalk
michalk at awpi.com
Sat Oct 29 17:23:53 CDT 2005
Okay, I'm timing my mag that has an impulse coupling.
I don't have a buzz box, but I do have a cheap $20 handheld function
generator, and a not so cheap voltmeter.
I connected the function generator to the P-lead and ground, and my
voltmeter to the same place.
I set the voltmeter to read AC volts and get about 300 mV when the
contacts are open.
I want to time my mag for 28* BTDC. If I spin the motor around, the
impulse coupler releases a couple degrees ATDC, and then I see my 300mV
on the meter. This is NOT what I want to time to, right? So what I do
is turn past where the impulse fires, then go backwards. Only when I go
backwards to 28* BTDC do I see the expected behavior where I can see the
points open and close with the voltmeter.
Have I got this right?
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