Brother BE-438F - Manual (Page 39)

4. PREPARATION BEFORE SEWING ፧
30 KE-430F, BE-438F
4-5-2. Upper thread tension
Use the digital tension to adjust the tension as appropriate
for the material being sewn. (Refer to “Setting the tension
value”.)
Furthermore, turn the tension nut (1) (sub-tension) to adjust
the remaining length of upper thread to 35 - 40 mm, when
the
thread take-up lever is not used.
Setting the tension value
Press the key (2) or the key (3) to change the
tension value (4).
* The tension value which has been set will be applied the
next time sewing is carried out.
[Reference thread tension]
KE-430F
Use
Medium-weight
materials (-03)
Knitted wear
(-0K)
Foundation
garments (-0F)
Heavy-weight
materials (-05)
BE-438F
Upper thread #50 or equivalent
#60 or
equivalent
#60 or
equivalent
#30 or equivalent #60 or equivalent
Lower thread #50 or equivalent
#80 or
equivalent
#60 or
equivalent
#50 or equivalent #60 or equivalent
Upper thread tension
(N) [Tension value]
0.8 - 1.2
[80 - 120]* 1
1.2 – 1.8
[70 - 130]* 1
0.5 - 1.2
[50 - 150]* 1
Lower thread tension
(N)
0.2 - 0.3 0.2 - 0.3
Pre-tension (N) 0.05 - 0.3 0.1 - 0.4
Needle DP x 5 #14 DP x 5 #9 DP x 5 KN#11 DP x 17NY #19 DP x 17NY #12
*1: This is the tension value when the pretension is 0.05 N.
2306B
2345B
Weaker !
Stronger !
2382B
2383B