A professional who tends machine that winds yarn in chain form from skeins or ball warps onto beams in parallel sheets. Responsibilities include:

• Laces end of skein around rollers and pulls end through dividers in separate skeins or inserts rod through center of ball warp and lifts warp onto stand for unwinding.
• Guides end of yarn chain around tension drums and lays individual strands of yarn between teeth of expansion comb.
• Turns crank to adjust comb to width of beam.
• Knots section of warp ends and inserts knots in slots of beam to hold yarn for winding.
• Starts, stops, and controls speed of machine with pedal.
• Observes yarn to detect slubs and broken or tangled ends; cuts out slubs, using scissors, and ties broken yarn ends with fingers.
• Inserts lease strings at intervals to preserve arrangement of yarn.
• Secures ends of yarn on beam with gummed tape.
• May doff beam, using hoist.
• May be designated according to type of yarn wound as silk beamer.