SPUN YARN SYSTEM
Speed Frame LF4280 Series
High-Productivity Roving with Intelligent Automation
A highly flexible speed frame engineered to deliver high-speed and consistent quality roving. The LF4280 Speed Frame, accommodating up to 280 spindles, offers a highly automated roving solution that ensures consistent roving quality through its servo-based drafting system and continuous roving tension control. Its dual-drive spindle arrangement guarantees uniform bobbin formation with a perfect roving build, while the CQ constant-air suction duct provides sustained cleaning efficiency. With integrated auto-doffing (LF4280/SX model) and RTS provisions, the machine delivers reliable, efficient, and high-quality roving preparation for modern spinning operations. LF4280 Variants Offered: 1. Speed frame LF4280/A – Without Auto-doffer 2. Speed frame LF4280/SX – With Auto-doffer
- Up to 280 spindles for processing cotton and man-made fibers
- Dual-drive spindle arrangement for consistent bobbin formation
- Four-segment electronic drive (servo + inverter) for precise synchronization
- Automatic roving tension controller ensuring uniform winding tension
- Patented CQ constant-air duct delivers for longer m/c performance
- Detachable flyer spindle for easy access and quick maintenance
- Energy-efficient drives reducing overall power consumption
- Continuous monitoring of drives and motors supports predictive maintenance
Four Segment Drive System
The machine features a dual-servo motor-driven drafting system, while the bobbin, bobbin rail, and flyer are powered by inverter-controlled induction motors. All drives are fully synchronized, ensuring smooth operation and optimized machine performance. A power-saving option allows the last section to be switched off when not in use, and the common drive architecture for bobbin and flyer motors simplifies maintenance and reduces spare part inventory, enhancing overall operational efficiency.
Drafting Drive
The machine features a well-established 3-over-3 or 4-over-4 double apron drafting system with servo drive, providing reliable and precise drafting across a wide range of fibers, including cotton, MMF, blends, linen-cotton blends, modal, lyocell, and acrylic. The system ensures uniform nipping and optimal sliver guidance, with short, medium, and long cradles available to accommodate different fiber lengths. The drafting drive is fully electronic, with one servo controlling the front roller and a second servo driving the remaining fluted rollers, creel, and positive cleaning device, delivering consistent performance and efficient fiber handling.
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