A professional who tends one or more machines that twist combed hemp or sisal fiber or yarn into strands and winds strands onto bobbins. Responsibilities include:

• Threads sliver (combed fiber) or yarn through guides to twisting mechanism of spinning machine.
• Opens safety cover to inspect twisting die, places empty bobbin on spindle, and fastens end of yarn or strand to bobbin.
• Starts machine and observes operation to detect unsteady flow of material into spinning head, and uneven winding on bobbin.