A professional who tends truing machine which aligns spoke-wheels. Responsibilities include:

• Places loosely laced (spoked) wheel onto rotating bed of machine.
• Presses buttons to lower ram which clamps wheel into position.
• Turns knob which rotates turntable to align spoke nipple screws on wheel with advanceable power screwdrivers.
• Presses button to bring screwdrivers into contact with screw and tighten them.
• Pushes lever to progressively rotate worktable to align screws with screwdrivers.
• Removes wheel from machine and mounts on mandrel; places point of dial indicator against rim.
• Spins wheel and reads dial to ascertain points of diameter and circumference imbalance.
• Turns spoke nipples with wrench where required to true-up wheel.