A professional who tends machines, such as corn shelling machine, winnowing machine, and grass-removing machine that separate crops from waste materials, such as grass, twigs, and cobs. Respnsibilities include:

• Turns switches to activate machinery, such as conveyors, blowers, and shakers.
• Adjusts machinery to obtain optimum separations.
• Loads conveyors, hoppers, and wheels to feed machines.
• Positions boxes or attaches bags at discharge end of conveyor to catch products.
• Moves baffle lever that channels product flow to container or stops flow during container exchanges.
• Observes machine operation to detect malfunctions and adjusts machine, lubricates parts, and replaces pieces to improve performance.
• Stops machinery and pulls debris or overloads from conveyors to avoid clogging.
• May level and smooth materials on conveyor to regulate flow through machine.
• May weigh containers to ensure conformance with specifications.
• May close filled sacks, using needle and thread or tie-string, and stencil identifying information on sack.
• May mix and pour chemical solutions, such as preservatives and insecticides, in treating tanks.
• May transport materials and products to and from machine, using dump truck.
• May be identified with machine tended.