7. Staggered stitches: 1. Too little pressure on presser foot 2. Take-up spring weak, broken or missing. 8. Uneven stitch length: 1. Incorrect presser foot pressure 2. Feed dog dirty or worn out. 9. Material not feeding correctly: 1. Stitch regulator set too close to 0 point 2. Dirt under needle plate near feed dog 3. incorrect presser foot pressure 4. Bent presser foot.

Direct Indirect Denier Tex 900 m=1 gms=1 Denier 1tex=1gm/km 50/1=50 single yarns 4.5 YARN MANUFACTURING SYSTEM: The twisting process by which fibers are formed into a yarn is referred to as spinning. Spinning includes all the processes required to prepare and clean the fibers from the opening of the bale to the twisting of the yarn in its preparation for the textile loom.