Control of a power screwdriver is provided by a laser sensor to fix a screw retained distance spacer at the correct depth

摘要

A power drill is used to fix a screw [3] with a distance spacer [5] into a wall. The drill is used as a screwdriver and is fitted with a drill bit [12]. The set distance of the spacer is fixed by a laser [9] and the drilling power is interrupted when an optical light sensor [8] detects the laser beam.