@baricl wrote:
Why not just purchase an inexpensive Multimeter and use the Ohm/Buzzer setting.
Plug the 2 leads into the meter. Clip one lead to the cutter spindle.
Attach the other lead (Permanately) to a thin metal plate and your good to go.No parts to buy. All you need is a suitable plate
Here’s one from Sears for 10 bucks.
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