A professional who examines warp threads in loom harness to determine if they are drawn in according to pattern chart. Responsibilities include:

• Turns wheel on head of loom to raise harness frames, and inspects threads drawn through frames to detect mistakes.
• Redraws threads through drop wires, heddle eyes, and reed dents to correct misdraws, using reed hook.
• May start loom and examine woven cloth for defects caused by misdraws, correct misdraws, and mark defects in cloth, using chalk or thread.