Almost all drive shafts use durable timing belts and helical gears keeping noise to a minimum. Oil baths for main and draft gearing maintain stable, high-speed operation over long periods of time. The sturdily constructed headstock prevents vibration and encases the gearing, keeping it clean and free from fly. Switches are centrally located and include graphic indicators, while the function panel allows operation presetting and monitoring of machine running conditions. Bottom rollers are electro-polished and induction-hardened, for a smooth surface which minimizes lap-up of roving onto the rollers. The bobbin drive has a clutch which slows down the winding speed just before full bobbin, reducing tension on roving and preventing irregularities at reset. A cone drum speed control device keeps the winding tension constant, ensuring stable roving with a minimum variation in weight. The four-roller drafting system places a collector between the front and second rollers, separating drafting and collecting zones for superior roving softness and smoothness. Upper rail cover and roller beams are kept clean by a pneuma-blowing mechanism. An optional roller part cleaning device periodically blows compressed air to keep the path of the fiber, the clearers, and the weighting arms free of fly. An optional crossflow fan dust collector picks up bottom clearer waste and fly near the roller parts, as well as scrapes accumulated fly. The headstock is completely sealed to prevent dust and fly from entering the gears. Anti-static coating prevents fly accumulation, and light, precision-cast construction withstands the rigors of high-speed revolution. A perfect balance during operation ensures consistent roving and prevents wear on parts. The flyers' special shape offers less air resistance, preventing roving breakages. A constant level of pressure for roving is maintained, enabling roving weight to increase by approximately 20% when compared to other types of flyers. Since the flyer is supported and driven at the top flyer rail, doffing can be done without removing flyers, even for large packaged roving. Labor and time required for doffing is just 1/3 of that of conventional roving frames. This doffing procedure eliminates the possibility of damaging the wound rovings. There's also no need to accumulate a certain amount of roving at the top of the flyer just before doffing. This helps avoid roving with irregular twists. FL series high-speed roving frames can be integrated into existing Toyota automatic transfer systems at many factories. This provides the following advantages: Remarkable cost savings The flexibility of multiple production systems