Patent ID: 7134817

Claim:
A printed board machining apparatus comprising: a spindle having a rotatable tool for machining a workpiece placed on a table; a pressure foot fitted to said spindle such that said pressure foot is movable along an axial direction of said spindle, said pressure foot having: a contact surface for contacting the workpiece; a tool through-opening opened through said contact surface for allowing an end of said tool to move therethrough; a compressed gas blowout port opened through said contact surface for blowing out compressed gas therethrough to prevent the workpiece from being lifted up; and a groove through said contact surface for allowing an outer periphery of said pressure foot to communicate with said tool through-opening while said contact surface is in contact with the workpiece; a suction device for vacuuming a space between said spindle and said pressure foot, wherein said tool of said spindle is operable to machine the workpiece while said suction device vacuums the space and while said contact surface of said pressure foot presses the workpiece down to the table; and a compressed gas supplying device for supplying the compressed gas to said compressed gas blowout port of said pressure foot.