A professional who tends machines that grind grain between rollers. Respnsibilities include:

• Observes flow of grain between grinding rollers.
• Adjusts slides to regulate flow of grain to rollers and turns hand screws to regulate space between rollers, under direction of grinder operator.
• Pulls lever to spring rolls apart when grain stops flowing, to prevent damage to rollers.
• May start conveyor that transports grain from storage area to grinding machines.
• May lubricate machines.
• May obtain sample of ground grain for testing.