Electronic depth control for drill

Details Electronic depth control for drill Electronic depth control for drill

1984-12-06

1988-08-23

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

With control means energized in response to activator...

To control relative positioning of tool and work

B23B 3908

Patent

active

047657847

ABSTRACT:
A drilling system for drilling circuit boards includes means for precisely controlling the depth of drilling despite surface variations in the circuit boards. The system includes a detection circuit for detecting contact between the circuit board and drill and control circuitry for thereafter causing the drill to move a predetermined distance corresponding to the desired drilling depth.

REFERENCES:
patent: 3487730 (1970-01-01), Dohring et al.
patent: 4203691 (1980-05-01), Nishimura et al.
patent: 4329771 (1982-05-01), Eto et al.
patent: 4396322 (1983-08-01), Nomura et al.
patent: 4400118 (1983-08-01), Yamakage et al.
patent: 4440530 (1984-03-01), Yamakage
patent: 4451892 (1984-05-01), McMurtry
patent: 4504917 (1985-03-01), Grimm et al.

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