A professional who tends semiautomatic machine that winds thread from cones onto spools or tubes used on sewing machines. Responsibilities include:

• Places full cones on rack, and passes threads through guides, tension device, yardage counter, and drop wires. Loads tubes or spools into machine hopper.
• Observes operations of machine to detect breaks or lap-ups. Removes spools having winding defects, or pieces up broken ends, using knotter.
• Inspects spools for defects in winding and color as they are discharged by machine.
• May verify spool size, using gauge.
• May pack filled tubes or spools in boxes.