A professional who assembles, tests, and adjusts prototype weight scales according to drawings, using handtools and power tools and metal fabricating machines. Responsibilities include:

• Selects prefabricated parts or fabricates parts required to assemble scale, using handtools and metal fabricating machines, such as drill press and bench lathe.
• Assembles mechanical and electrical parts and subassemblies of scale according to drawing, using handtools and power tools.
• Tests function and calibration of assembled scale, using test weights.
• Disassembles scale to determine type error and replaces or adjusts parts to correct error.
• Adds weight to poise or lever to calibrate scales or drills holes, hones, or twists levers or pivots to reduce weight.
• Informs engineering department of findings and recommends changes in design to correct or improve performance of prototype scale.