Device for the high-speed drilling of printed circuit boards

Details Device for the high-speed drilling of printed circuit boards Device for the high-speed drilling of printed circuit boards

2006-10-27

2011-12-06

Howell, Daniel (Department: 3726)

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

C408S009000, C408S130000, C408S702000

Reexamination Certificate

active

08070400

ABSTRACT:
A device for the high-speed drilling of boards for printed circuits and the like. The device has a support, a drill head with an associated mandrel, and a member for locking and driving a drill bit in the mandrel. The mandrel is actuated by a compressed air turbine and has an optical encoder for encoding the speed of rotation of the turbine and generating a signal representing this speed. The signal is supplied to a control circuit in order to drive a proportional valve supplying compressed air to the turbine as a function of the speed of rotation encoded by the optical encoder.

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