A professional who tends machines that perforate, groove, and blast patterns on insulation board panels to form acoustical tile. Responsibilities include:

• Dumps sacks of ground walnut shell into hopper of blaster machine and moves controls to regulate flow of shell into blaster.
• Adjusts height of saws to control depth of cut, using gauge and wrench.
• Starts machines and conveyors, and spaces pattern templates on feed conveyor.
• Feeds panelboards into perforating machine, and observes perforated panels to ensure automatic positioning upon templates.
• Observes sets of panels and templates as they are conveyed into blaster machine to ensure that specified pattern or decorative design is imprinted upon panels according to template design.