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.

(e) Scutching: The removal of woody parts from fibers is scutching. The scutching machine removes the broken sheaves by means of rotating wooden paddles, thus finally releasing the flax fiber from the stalk.