Observe machine operation to detect workpiece defects or machine malfunctions, adjusting machines as necessary. Set up and operate machines, such as lathes, cutters, shears, borers, millers, grinders, presses, drills, and auxiliary machines, to make metallic and plastic workpieces. Inspect workpieces for defects, and measure workpieces to determine accuracy of machine operation, using rules, templates, or other measuring instruments. Read blueprints or job orders to determine product specifications and tooling instructions and to plan operational sequences. Start machines and turn handwheels or valves to engage feeding, cooling, and lubricating mechanisms. Select, install, and adjust alignment of drills, cutters, dies, guides, and holding devices, using templates, measuring instruments, and hand tools. Move controls or mount gears, cams, or templates in machines to set feed rates and cutting speeds, depths, and angles. Position, adjust, and secure stock material or workpieces against stops, on arbors, or in chucks, fixtures, or automatic feeding mechanisms, manually or using hoists. Set machine stops or guides to specified lengths as indicated by scales, rules, or templates. Perform minor machine maintenance, such as oiling or cleaning machines, dies, or workpieces, or adding coolant to machine reservoirs.