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11. ADJUSTMENT
125
KE-430F, BE-438F
11-20. Correcting the digital tension output
1
1. Adjust the pretension to 5 to 7 gf (0.05 to 0.07 N).
* At this time, use the TOYOBO polyester #50 (white) thread
which is recommended by Brother.
2. Thread the upper thread as shown in the illustration at left.
NOTE:
Do not thread the thread through the thread take-up spring.
* If you do not observe the above note, the digital tension output
correction may not be carried out correctly.
2
While pressing the keys simultaneously, turn on the power
switch.
* Keep pressing the key until the model name is displayed
and the buzzer beeps once.
The tension discs will close, and “tEn” will illuminate in the
PROGRAM No. display, “ 1” will illuminate in the SECTION No.
display, and a value from “0” to “39” will illuminate in the menu display
respectively.
* The value in the menu display may vary for individual sewing
machines.
No. of
measurement
Standard tension value
for digital tension (gf)
1st 20
2nd 80
3rd 180
・ The procedure for correcting the tension (output) from the
digital tension involves carrying out the procedure of measuring
the actual upper thread tension and entering the measured
value using the operation panel four times.
・
The standard values for the four tensions for the digital tension
vary for each measurement as shown in the table at right.
By entering the actual measurement values each time, the
digital tension output will be automatically corrected, and the
tension that corresponds to the setting can then be obtained
when sewing.
4th 330
2816B 2817B
2819B 2818B
(Continued on next page.)