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Adjusting The Thread Tension At The Tack Tension Control; Adjusting The Thread Tension At The Zigzag Tension Control - Brother HE-800B Service Manual

Electronic direct drive lockstitch button holer.
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7-16. Adjusting the thread tension at the tack tension control

0.3 - 0.5 mm
0.1 - 0.3 mm

7-17. Adjusting the thread tension at the zigzag tension control

0.5 - 1.0 mm
0.5 - 1.0 mm
1. Turn on the power and set the sewing machine to the
home position. Then press the THREAD key to lower
the work clamp.
2. Loosen the set screw (1), and then adjust the
clearances between the tension release cam (2) and
the tension release pin (3) as shown in the illustration.
3. Press the THREAD key and check that the tension disc
opening amount is 0.5 - 1.0 mm when the work clamp
is raised.
4. Press the THREAD key once more and check that the
tension discs are fully closed when the work clamp is
lowered.
0744D
Position the tension release solenoid as described in "6-4.
Tension release mechanism (1)" before carrying out this
adjustment.
1. Turn on the power and set the sewing machine to the
home position. Then press the THREAD key to lower
the work clamp.
2. Loosen the set screw (1), and then move the tension
stud bracket assembly (2) in and out to adjust so that
the tension disc opening amount is 0.5 - 1.0 mm.
3. Check that the tension discs are fully closed when the
power is turned off.
0745D
HE-800B
7. ADJUSTMENT
108

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