A professional who tends portable or stationary automatic warp-tying-in machine that ties warp ends from full warp beam to warp in loom in order to resume weaving without repeating drawing-in process. Responsibilities include:

• Reads work order or confers with supervisor to determine looms needing warp-tying-in process.
• Divides, combs out, straightens, and applies warp softener to ends of warp from full beam and from exhausted beam, and clamps ends in position in tier.
• Presses button or turns crank to start tying mechanism.
• Observes and controls tying-in process as machine picks up corresponding strands from warp beam and from loom beam, ties strands together, and cuts off excess yarn above knot.
• Stops machine, corrects misalignment of warp yarn, and releases joined strands from machine.
• Manually ties ends not tied by machine.
• May pull warp through drop wires, harnesses, and reed so knots will not jam assembly and break when loom is started.
• May repair tying machine.
• May doff exhausted warp beams and position full beams prior to warp-tying-in process, using hoist.