A professional who tends twisting machine frames equipped with thermal units and false-twist spindles to produce stretch yarn. Responsibilities include:

• Threads yarn through guides, feed rollers, and heating unit, around entrance wheel of false-twist spindle, through traverse guide, and onto takeup bobbin, utilizing suction lines along path yarn travels, extension rods, and wire threader.
• Observes signal lights that indicate yarn breaks and malfunction of specified sections of machine.
• Records information regarding malfunction on flag card and places card on machine unit to signal maintenance crew.
• Reads doff schedule or uses gauge to determine when packages should be doffed.
• Doffs full takeup packages.