thank you very much.
clave

Quote Originally Posted by Hood
The way it works is simple, the balls make contact with the copper and the space between the copper is bridged by the pins (which are insulated from each other). The pins are held against the balls by a spring and any side movement or end movement against the pin holder causes it to break contact with the balls and thus the circuit is broken.
I adjusted my first one by means of the four setscrews you can see sticking out the side of the metal holder and got it true to within 0.005mm and its repeatability at picking up an edge or coming down against the table or workpiece was again within 0.005mm
Hood