An electric sparking drill and a method for using the same to drill a hole
in a workpiece where at least one of a voltage applied to an electrode,
the conductivity of a liquid applied between the electrode and the
workpiece during drilling, and a gap between the electrode and the
workpiece are controlled to create the desired hole in the workpiece. The
electric sparking drill and a method for using the same to drill a hole in
a workpiece also improve the hole operation and/or the quality of the hole
made by operating at the arcing voltage, including a touch stop function,
including a sacrificial electrode, and/or including a guide member
function.
