Speed-Break Rate Relationship and Optimum Speed
topic
Warp break rate increases approximately with the square of loom speed from the quadratic relationship between speed and shed formation forces, with the optimum speed being that at which the marginal production gain from increased speed is exactly offset by the marginal production loss from increased break-related downtime, calculated from the break-rate-versus-speed function and the average restart time per break that together determine net production rate as a function of speed.
Role
Establishes the mathematical framework for identifying the speed that maximises net production rather than gross speed, with the optimal speed calculation requiring both the measured break rate function and the restart time data that together determine the production-optimising speed that may be substantially below maximum mechanical capability for yarns with steep break rate-speed relationships, preventing the common error of operating at maximum speed regardless of the resulting break rate.