A professional who sets up and operates automatic machine to force steel pins through thread-holes of plastic buttons to remove molding flash: selects numbered dial feed-plate and pin-holding chuck according to size and type of button and installs them in machine, using wrenches.

• Turns setscrews to align dial plate and pin-holder to ensure that pins will be centered in thread-holes of buttons.
• Pours buttons into hopper, using hand scoop.
• Observes feeding of buttons into dial pockets and action of pin-driving and ejecting mechanism.
• Examines buttons for defects and adjusts machine as required.
• Removes filled containers from beneath ejection chute and places them on bench or handtruck.