A professional who controls temperature of bushings and speed of winders on fiberglass forming machines to maintain specified yardage per pound in sliver. Respnsibilities include:

• Monitors bushing control panels, temperature charts, and indicators to determine if temperature of furnace bushings, molten glass over bushings, forehearths, and canals meet specifications.
• Obtains test skein of sliver from test-skein winder and dries skein for specified time in electric furnace.
• Weighs dried test skein to obtain weight in grams and converts weight to yards per pound to determine deviations from specifications, using yardage conversion chart.
• Turns digital dial on bushing control panel to regulate temperature of bushings.
• Tests voltage on compensator units that vary speed of collets (winding rings), using voltage meter.
• Determines bushing temperature specified for voltage reading from table and turns button to set temperature and regulate speed of collet.
• Records data, such as shift, crew, date, time of temperature reading, time of yardage reading, type of sliver produced, temperatures, and adjustments made, in yardage control log.