Dobby Shaft Capacity and Repeat Width Limitations
topic
Standard dobby looms operate with 8 to 32 shafts with 16 and 24 shaft configurations being the most common in commercial production, with shaft count limiting the maximum pattern repeat width to the number of shafts multiplied by the threading repeat, so a 16-shaft loom with straight draft threading can produce patterns no wider than 16 ends, requiring grouped threading to extend effective pattern width within shaft limitations or Jacquard weaving for patterns wider than dobby shaft capacity allows.
Role
Defines the fundamental design constraint of dobby weaving that distinguishes it from Jacquard by limiting the pattern repeat width to the shaft count, with this limitation shaping the category of designs producible on dobby looms and guiding fabric designers toward geometric, regularly repeating patterns that exploit the full capability within shaft constraints rather than the unlimited repeat size and figured complexity that Jacquard enables.