Brother International S-7200B Service Manual - Page 40

Adjusting the thread take-up amount (-[][]3 specifications

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6. ADJUSTMENTS 6-12. Adjusting the thread take-up amount (-[][]3 specifications) CAUTION Turn off the power switch before carrying out this operation. The machine may operate if the treadle is depressed by mistake, which could result in injury. NOTE: Do not use this function with models that are not -[][]3 specifications. Increases Standard If the thread take-up amount is small and the thread breaks easily when sewing heavy materials, you can increase the thread take-up amount. 1. Remove the face plate. 2. Remove the two rubber caps (1). 3. Use a hexagonal wrench 3 to loosen the set screws (2) and (3) by approximately two turns. 4. Adjust the thread take-up amount. Turn the thread take-up support shaft (4) clockwise so that the groove (5) is facing straight upward. Turn the thread take-up support shaft (4) counterclockwise so that the groove (5) is facing straight downward. 5. With the thread take-up support shaft (4) pushed in as far as it will go, first tighten the set screw (2) until it touches the screw stop on the thread take-up support shaft (4). 6. After this, tighten the set screw (3). 7. Install the two rubber caps (1). 8. Install the face plate. Screw stop 3677M 33 S-7200B

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S-7200B
6. ADJUSTMENTS
33
6-12. Adjusting the thread take-up amount (-[][]3 specifications)
CAUTION
Turn off the power switch before carrying out this operation.
The machine may operate if the treadle is depressed by mistake, which could result in injury.
NOTE:
Do not use this function with models that are not -[][]3 specifications.
If the thread take-up amount is small and the thread breaks
easily when sewing heavy materials, you can increase the
thread take-up amount.
1. Remove the face plate.
2. Remove the two rubber caps (1).
3. Use a hexagonal wrench 3 to loosen the set screws (2)
and (3) by approximately two turns.
4. Adjust the thread take-up amount.
<To increase the thread take-up amount>
Turn the thread take-up support shaft (4) clockwise so
that the groove (5) is facing straight upward.
<To return the thread take-up amount to the standard
setting>
Turn the thread take-up support shaft (4) counterclockwise
so that the groove (5) is facing straight downward.
5. With the thread take-up support shaft (4) pushed in as far
as it will go, first tighten the set screw (2) until it touches
the screw stop on the thread take-up support shaft (4).
6. After this, tighten the set screw (3).
7. Install the two rubber caps (1).
8. Install the face plate.
<Thread take-up amount>
Increases
Standard
Screw
stop
3677M