emc2 cnc oword gcode tool changer owords/gcode files overload the built in Tn & M6 commands this example changes 4 tools then empties the chuck with T0 sequence: receiver starts empty T4 M6 ( just a GET, nothing to put away ) dummy circle cut T1 M6; dummy cut T3 M6; dummy cut T2 M6; dummy cut T0 M6; return to work ctr A trick is used to visualize the tools in the receiver, 2 vismach shapes are at the tooltip, and one has its dimension at 0 while other have value. This makes the tool 'morph' . The values come from offsets in the .tbl file