Brother LH4-B800E Instruction Manual page 69

7. CORRECT USE
Thread take-up spring tension
Turn the thread tension stud (1) to adjust the thread take-up spring tension to between approximately 0.10 -
0.20 N in accordance with the material to be sewn.
Thread take-up spring height
Loosen the set screw (2), and turn the entire thread tension adjuster to adjust the thread take-up spring
height to between 4 - 6 mm in accordance with the material to be sewn.
Thread take-up spring tension
Weaker
Stronger
2149Q
Reference thread tension
Stitch patterns
Upper thread
Lower thread
Upper thread tension
Lower thread tension
Thread take-up spring tension
Thread take-up spring height
62
4 – 6 mm
(1)
Whip stitch
Polyester #50 Spun #60
Polyester #50 Spun #60
0.30 - 0.70 N 0.50 - 0.85 N
0.15 - 0.25 N
2151Q
2152Q
HE-8000
Thread take-up spring height
Polyester #50
Polyester #50
0.75 – 2.00 N
0.10 - 0.20 N
4 - 6 mm
Upper thread tension for whip stitches
(with zigzag tension open)
When using a program that has whip stitches set,
press the RESET key to lower the work clamp, and
then take the measurement shown in the illustration.
Upper thread tension for purl stitches
(with zigzag tension closed)
When using a program that has purl stitches set,
press the RESET key to lower the work clamp, and
then take the measurement shown in the illustration.
(2)
2150Q
Purl stitch
Spun #60
Spun #60
1.00 – 2.20 N
0.05 - 0.15 N