... system, whithin one system, "knit","tuck", or "no knit" is carried out, and the ioop transferring or taking is independent of carriage direction ... to the Three-way-technique it could finish "knit","tuck" or "no knit" in one can system.9. rackingServo motor driven, man ... yarn break,large knot, needle break,fabric press-off, wraparound check, needle smash, racking error ,program error, and pieces count ...