Yeah, and they aren't electronic, either. They have a battery and small
light bulbs. No rocket science there. Upon contact with a metallic
surface, the light comes on. Mine is not forgiving for over run. You
should never have to worry about over run if you approach the target edge
carefully and slowly. The range of "off" to full "on" is less than a thou
I love my wiggler...but sometimes it requires a little too much
height....been wondering if someone makes a stubby electronic edge finder
for cases where you don't have enough clearance for the wiggler to work.
Wigglers are most useful with the point, especially if you do work from a
layout. For edge finding, I prefer a 1/2" diameter spring loaded edge
finder. The action is crisp and reliable, but you have to run the edge
finder at the appropriate speed.
You don't need much in the way of instruction with a wiggler. When you
make contact with a part, the wiggler end will rotate about center, closing
down the arc until you reach the point where the contact end, be it the ball
or disk, is in full contact with the part. Any further movement will force
the wiggler off center and it will either ride up on the part until it
shoulders out, or it moves above the part and swings about. At that
point the centerline of the spindle is half he diameter of the contact end
of the wiggler from the edge of the part.
It's a good idea to set your dial, or DRO, then repeat to see if it swings
out at the same point. It's easy to over ride the edge the first time.
That's true of either type of edge finder.
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