Iecotex Slub Motion manufactures Electronic Slub Making Machine. Iecotex Slub Motion is an ISO 9001:2000 certified company. Attachments manufactured by this company are being used for producing slubs on Ring-Spinning Frames and Open End Spinning Machines, and are capable of making many permutations of SLUB length, thickness and frequency. Electronic Slub Making Machine, when put in action, the draft in the main drafting system [in R/F] is cancelled by accelerating the back and middle [bottom] rollers of the drafting system so that the under drafted roving appears as SLUB in the spun yarn.