Shedding Geometry
High-speed weaving machines require specific motion curves to transition harness frames smoothly between top and bottom shed positions. Using cycloidal cam profiles allows the loom to achieve high insertion rates while minimizing the vibration of mechanical components.
Acceleration Curve
The mathematical curve of the cam is designed to provide zero acceleration at the start and end of each movement cycle. By employing cycloidal cam profiles, the machine avoids the abrupt shocks associated with simpler harmonic or parabolic motions. This smooth transition reduces the mechanical wear on the cam followers and the harness linkages.
Precise machining of these components ensures that the shed opens and closes with microsecond accuracy. The shape of the cam also influences the duration of the dwell period when the shed is fully open for the passage of the weft carrier.
Warp Management
Proper shed timing reduces the friction between adjacent warp yarns and prevents the formation of lint or yarn breaks. Since cycloidal cam profiles manage the tension peaks effectively, they are standard in water-jet and air-jet weaving applications.
Operational Threshold
Maintenance teams measure the wear on the cam surfaces to ensure the motion remains within the original design tolerances. Consistent performance of the cycloidal cam profiles is necessary for maintaining weaving efficiency at speeds exceeding one thousand picks per minute.
