Brother BE-438D - Upper Thread Tension

4. PREPARATION BEFORE SEWING
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27
KE-430D, BE-438D
4-5-2. Upper thread tension
Turn the tension nut (1) (main tension) to adjust the tension
as appropriate for the material being sewn.
Furthermore, turn the tension nut (2) (sub-tension) to adjust
the remaining length of upper thread to 35 - 40 mm, when
the
thread take-up lever is not used.
[Reference thread tension]
KE-430D
Use
Ordinary materials (-01)
Knitted materials
(-07)
Foundation
garments (-0F)
Denim (-02)
BE-438D
Upper thread #50 or equivalent
#60 or
equivalent
#60 or
equivalent
#30 or equivalent #60 or equivalent
Lower thread #60 or equivalent
#80 or
equivalent
#60 or
equivalent
#50 or equivalent #60 or equivalent
Upper thread tension
(N)
0.8 - 1.2 1.6 - 2.0 1.0 - 1.8
Lower thread tension
(N)
0.2 - 0.3 0.2 - 0.4
Pre-tension (N) 0.05 - 0.3 0.1 - 0.4
Needle DP x 5 #14 DP x 5 #9 DP x 17NY #19 DP x 17NY #12
[Guide to maximum sewing speed for KE-430D]
Max. sewing speed (rpm)
Use
Standard hook Large hook
8 layers of denim 3,200 2,500
12 layers of denim 2,700
Ordinary materials 2,700 2,500
Knitted materials
Foundation garments
2,500
Note:
The thread may break due to heat under some sewing conditions.
If this happens, reduce the sewing speed, or use the liquid cooling tank.
4434Q
Weaker
Stronger
Weaker
Stronger