Abstract: A vinyl weld seam cleaner having a fixed support head and a movable support head. The movable support head accommodates windows of varying widths. Each support head has an upper and lower machine head that houses a tool head. The tool heads have interchangeable tools. The machine head and tool head cooperate together to allow tools on the tool heads to move in three dimensions. The tools can clean and machine at a 45.degree. angle along a weld seam or at a 90.degree. angle relative to the top, sides and bottoms of a window frame. The window frame is engaged by an inner conveyor belt that moves the frame into and out of a first cleaning position for cleaning and machining the top corners of the window frame, and into and out of a second cleaning position for cleaning and machining the bottom corners. The inner conveyor includes fixed and movable fences, tabletop back fences, and clamps. The top corners are simultaneously cleaned and the bottom corners are simultaneously cleaned.