Light beam alignment system

摘要

A saw such as a chop saw, a circular saw, a compound miter saw (10) or a sliding compound miter saw having a rotatable saw blade (12) is provided with a laser arbor (42) alignment system. The laser arbor (42) may include a power generator (50,56) that generates power as the saw blade (12) and the laser arbor (42) are rotated by a spindle (44). The generator (50,56) may include a stator (50) comprising an electrical magnet or a permanent magnet mounted on a fixed portion of the saw (10). The other portion of the generator (50,56) is a rotor (56) comprising a coil that is rotated with the laser arbor (42) to generate power for the laser (60). Power may also be provided to the laser (60) by slip ring contacts from a stationary source to the laser arbor (42).