Ammeter disassembly

70Duster340 said

Well, I managed to locate what is the adjustment for the needle. It's a tiny sort of cam lobe behind the needle and only accessible from the bottom. It's a very intricate part, and it has to be done with extreme care due to the location of the copper winding. I managed to trim enough of the backing to allow the gauge face to stop contacting the gauge needle. All in all, it was a painstaking process, but it looks good and is functional.

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You may be diddling the wrong "adjustment." Mechanical adjustments to the needle are usually for zero adjustments, IE far left, no voltage applied. The original "project" (and the thread I referenced the adjustment is ELECTRICAL. Voltmeters are actually milliameter/ microammeters with what is called a "multiplier resistor" in series to act as a voltmeter. The multiplier in the Sun???? meters used in the original thread has a potentiometer which adjusts the meter reading with voltage applied, so that you can set it where you want on the original ammeter scale.