Dynamic Hysteresis Loops in High Speed Flax Shedding and Moisture Adjusted Invoice Settlements
Dynamic flax shedding causes thermal moisture desorption, requiring invoice adjustments based on ISO 6741 oven-dry mass plus standard regain.
Electronic Dobby Dwell Profile
Kinematic Schedule
Motion parameters defining the stationary period of the harness frames allow for the clear passage of the insertion element through the warp shed. The electronic dobby dwell profile specifies the exact timing and duration of this pause within the weaving cycle.
Weaving Efficiency
Optimization of the pause duration reduces the friction between the warp threads and the passing rapier or shuttle. When the electronic dobby dwell profile is set incorrectly, the harness frames may begin moving before the filling yarn is fully inserted. This timing error results in frayed warp ends or broken picks.
High speed weaving of heavy linen fabrics requires a longer dwell to ensure that the shed remains wide enough for the entire insertion stroke.
Mechanical Limit
Software interfaces on modern looms allow technicians to adjust the electronic dobby dwell profile in small increments of degrees. This adjustment changes the acceleration and deceleration curves of the harness frames. While a longer dwell facilitates easier filling insertion, it also increases the peak mechanical load on the dobby drive.
The settings must balance the need for shed stability with the longevity of the machine components, ensuring that the weaving process operates within the physical capabilities of the loom hardware at all times.