the invention at static rest the work piece positioner horizontal mass centerline 56 is in approximate vertical alignment with the implement mass centerline 58 alternatively the work piece positioner horizontal mass centerline 56 is in approximate vertical alignment with the implement mass centerline 58 when the robot 150 is in dynamic motion in operation a work piece supported on a work piece positioner assembly 14 will be moved between a first holder position wherein the first work piece support is adjacent the working station and the second work piece drive support is adjacent to a loading station 60 this work piece holder 14 is moveably mounted to the base frame and capable of moving in a 180 u00b0 cycle to bring a work piece from the loading station 60 side to the workstation 70 side the robot 150 mounted on the inverted robot stand 130 attached to the frame structure 100 is then able to perform tasks upon the work piece at the working station 70 a headstock end side guard 80 and a tailstock end side guard 82 prevent damage and or injury to the flanks of the device 10 the above described preferred embodiment achieves teachings not known in the traditional positioner design as employed by those in the prior.