Job Description:

• 1) Sets up and operates multiaxis numerical-control milling machine to mill surfaces of metallic and nonmetallic workpieces according to specifications and tooling instructions, applying knowledge of machining methods: Threads perforated or magnetic tape through read-head in control console, or enters commands into control panel, to retrieve preprogrammed machine data from mainframe computer.

• 2) Inserts precision indicator in machine spindle, and depresses switches to jog spindle into contact with workpiece, synchronize tape and tool, and record setup point.

• 3) Retracts spindle and loads and secures first preset tool and holder.

• 4) Starts machine and observes cutting operation.

• 5) Compares numerical data display with specifications on operations sheet.

• 6) Assembles and presets tooling for next operation during automated cycle to reduce machine downtime.

• 7) Replaces milling tools with drilling and boring tools at specified change points to reduce or eliminate subsequent machining of workpiece on another machine.

• 8) May operate machine on preliminary dry run before machining first part to detect errors in tape or computer program.

• 9) May be designated according to make, trademark, or configuration of machine, characteristics of control system, or type of product as Contour-Path Tape-Mill Operator; Planer-Type Milling-Machine Operator, Numerical Control; Profile-Mill Operator, Tape Control; Tape Control Skin-or-Spar-Mill Operator; Tape Keller Operator.