Overfeed Control and Loop Density Management
topic
Air texturing machine overfeed is the ratio of yarn input speed to output speed expressed as percentage excess input, with overfeed of 15 to 50 percent for the effect yarn providing the excess filament length that forms surface loops, controlled by precision nip roll speed ratio adjustment at each texturing position with individual position overfeed setting enabling per-position optimisation of loop density for consistent yarn bulk across all machine positions.
Role
Controls the primary variable governing air-textured yarn bulk and loop count through the overfeed percentage that determines how much excess filament length is available for loop formation, with higher overfeed producing more and larger surface loops that increase yarn bulk and cover at the cost of reduced yarn tensile properties from the high proportion of yarn in non-load-bearing loop configuration.