초록 ▼

The subject invention controls the penetration of a drill or router into a cutting surface by preventing excessive downward travel by a spindle once a preset depth is reached. This is achieved by placing a mechanical stop on the pressure foot linkage and providing a compression means to absorb the e

The subject invention controls the penetration of a drill or router into a cutting surface by preventing excessive downward travel by a spindle once a preset depth is reached. This is achieved by placing a mechanical stop on the pressure foot linkage and providing a compression means to absorb the excessive downward travel. The compression can be absorbed within the select cylinder volume by reducing operating pressure appropriately, or within an added compression cylinder, or by a compression spring.

대표청구항 ▼

[ I claim:] [1.] An apparatus for depth control of a spindle assembly comprising:a. a stop positioned between a pressure foot linkage and the spindle to halt downward travel by the spindle;b. a means for setting the distance for travel by the spindle relative to the pressure foot linkage; andc. a me

[ I claim:] [1.] An apparatus for depth control of a spindle assembly comprising:a. a stop positioned between a pressure foot linkage and the spindle to halt downward travel by the spindle;b. a means for setting the distance for travel by the spindle relative to the pressure foot linkage; andc. a means for absorbing excessive downward travel applied by a Z-drive to the spindle.