Broken Drill Bit Detector
Original Publication Date: 1985-Nov-01
Included in the Prior Art Database: 2005-Feb-19
This arrangement senses when a drill bit breaks during automatic panel drilling. The drilling process can then be halted and the bit replaced. Without a broken-bit detector, when bit breakage occurs, holes are either not properly drilled or not drilled at all, requiring the panel to be reworked. An automatic drilling sequence is normally used whenever it is desired to drill a large number of holes into a panel. Multiple drill bits are used with either the panel or the bits sequentially stepped through a routine until all of the holes are drilled. If a bit breaks during the drilling sequence, the holes that were to be drilled by that bit may be only partially drilled or not drilled at all. Inspection of the panel or bits after drilling will discover the problem.