9. STANDARD ADJUSTMENTS
9. STANDARD ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing | Disconnect the air hoses from the air supply and | ||
machine should only be carried out by a | wait for the needle on the pressure gauge to | ||
qualified technician. | drop to "0" before carrying out inspection, | ||
Ask your Brother dealer or a qualified electrician | adjustment and repair of any parts which use | ||
the pneumatic equipment. | |||
to carry out any maintenance and inspection of | |||
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the electrical system. | If the power switch and air need to be left on | ||
Turn off the power switch and disconnect the | when carrying out | some adjustment, be | |
extremely careful | to observe all safety | ||
power cord from the wall outlet at the following | |||
precautions. |
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times, otherwise the machine may operate if the |
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start switch is pressed by mistake, which could | If any safety devices have been removed, be | ||
result in injury. | absolutely sure to | ||
When carrying out inspection, adjustment | positions and check that they operate correctly | ||
and maintenance. | before using the machine. | ||
When replacing consumable parts such as |
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the loopers and knife. |
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9-1. Adjusting the height of the spreader and looper
Spreader height
The clearance between the left spreader (forked spreader) and the eye looper must be set to match the thickness of the lower thread. The clearance between the right spreader and the right looper should be as small as possible while still letting the parts slide.
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3071Q |
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1.The right spreader (1) and left spreader (2) move by means of springs (3). Adjust so that the spreaders move smoothly between the right spreader stopper (4), the left spreader stopper (5) and the
2.If adjustment is necessary, loosen the screw (7) and then move the right spreader stopper (4) or left spreader stopper (5) up or down.
Looper height
3073Q | 3074Q |
1.Set the clearance between the eye looper (8) and the left spreader (2) to the same distance as the thickness of the lower (looper) thread.
2.The clearance between the right looper (9) and the right spreader (1) should be as small as possible.
3.If adjustment is necessary, loosen the screw (10) and then move the eye looper (8) and right looper (9) up or down.
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