Cam Shedding versus Dobby Comparison
topic
Cam shedding uses fixed profile cams for each shaft providing a predetermined lifting sequence suitable only for the weave repeat matching the cam profile, operating at higher speed with lower maintenance than dobby for plain, twill, and satin ground weaves where pattern change is infrequent, while dobby provides programmable lifting for any shaft combination sequence required for complex pattern weaves at lower maximum speed and higher mechanism cost, with the choice between cam and dobby determined by the pattern diversity and repeat complexity requirements of each weaving operation.
Role
Guides the technology selection decision for each weaving application by quantifying the performance and cost tradeoffs between the simplicity and speed of cam shedding for simple weaves and the design flexibility of dobby for complex patterns, with most commercial weaving installations using cam shedding for the majority of simple weave fabrics and dobby looms dedicated to the patterned fabric styles where the flexibility of programmable lifting justifies the additional mechanism cost.