computer pc shown generally as 54 in fig1 which computer includes a video monitor 56 and a speaker 64 the pc processor provides the control and communication functions for the pc compatible peripheral devices including display 56 generally the machine includes a base member 12 a bridge member 13 a tool head support assembly 14 and a tool head assembly 15 the base member is provided with a work table 17 rigidly mounted on the base member and a pair of trackways 18 mounted on the sides of the base member and disposed parallel to the x axis of the machine worktable 17 supports one or more workpieces to be machined such workpieces are positioned by positioning pins or other means and secured in position by clamps a vacuum hold down system or any other means the bridge member includes a transversely disposed beam section 19 spaced above and spanning the base member and a pair of transversely spaced depending leg sections 20 and 21 straddling the sides of the base member and mounted on trackways 18 for displacement relative to the base member along the x axis the bridge member is displaced relative to the base member along the x.