Set up and operate machine tools, such as milling machines, lathes, drill presses, and grinders, in order to machine castings or patterns. Read and interpret blueprints or drawings of parts to be cast or patterns to be made; then compute dimensions and plan operational sequences. Verify conformance of patterns or template dimensions to specifications, using measuring instruments such as calipers, scales, and micrometers. Program computerized numerical control machine tools. Design and create templates, patterns, or coreboxes according to work orders, sample parts, or mockups. Assemble pattern sections, using hand tools, bolts, screws, rivets, glue, and/or welding equipment. Repair and rework templates and patterns. Lay out and draw or scribe patterns onto material, using compasses, protractors, rulers, scribes, or other instruments. Clean and finish patterns or templates, using emery cloths, files, scrapers, and power grinders. Construct platforms, fixtures, and jigs for holding and placing patterns. Mark identification numbers or symbols onto patterns or templates. Select pattern materials such as wood, resin, and fiberglass.