摘要 |
A drill guide assembly ( 10 ) for a drilling tool ( 50 ) having a chuck engaging a bit portion ( 54 ) comprising a tip ( 62 ) and a length extending from the chuck, the drill guide assembly comprising a first member ( 14 ), a second member ( 12 ) and a trackable member ( 16 ). The first member ( 14 ) is adapted to abut a workpiece surface and defines a central aperture ( 19 ) therethrough adapted to receive the bit portion. The second member ( 12 ) is adapted to be axially displaced with respect to the first member and is axially biased therefrom, and defines a central aperture ( 11 ) therethrough adapted to receive the bit portion. The trackable member ( 16 ), fastened to the second member, comprises a detectable element ( 35 ) adapted to be located and tracked in three dimensional space, thereby defining the position and movement of the second member and therefore that of the drilling tool bit portion. |