Dobby Shedding Mechanisms Electronic and Mechanical
topic
Electronic dobbies use individual electromagnets to select positive or negative shed position for each shaft on each pick according to programmed patterns stored in loom control memory, with rotary or linear dobby mechanisms translating electronic selection into shaft movement for up to 32 shafts at machine speeds up to 900 picks per minute, providing unlimited weave pattern repeat length within the shaft count limitation.
Role
Extends weaving machine design capability from the simple weaves possible with tappet shedding to complex multi-shaft structures including honeycomb, huck, and compound weaves achievable with up to 32 independently programmed shafts, enabling pattern weave fabrics in upholstery, shirting, and technical textile applications requiring structure complexity beyond tappet capability.