G PHYSICS
G05 CONTROLLING; REGULATING
G05B CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
G05B2219/00 Program-control systems
G05B2219/50 Machine tool, machine tool null till machine tool work handling
G05B2219/50137 Contact in probe, touch probe to detect contact, touch trigger