A Circuit Board Drill also known as a Circuit Board Mill is a milling machine tool used to shape metal and other solid materials. The Circuit Board Drill has a rotating cutter which rotates about the spindle axis (similar to a drill), and the work piece is attached to a table. The circuit board milling operation involves movement of the rotating cutter sideways as well as 'in and out' unlike the drill which is moved exclusively along its axis. The circuit board cutter and material move relative to each other, generating a tool path along the work piece.
Slides and lead screws or analogous technology controls the movement. By moving the table while the circuit board cutter rotates in one place the movement is precisely controlled. This creates relative motion between the cutter and work piece. Circuit Board Drills may be manually operated, mechanically automated, or digitally automated via computer numerical control (CNC).
Circuit Board Drills can perform a vast number of operations, some of them with quite complex tool paths, such as:
While these operations are going on, the cutting fluid is pumped to the cutting site to cool and lubricate the cut, and to sluice away the resulting swarf.
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