Adjusting The Sewing Machine (Standard Adjustments); Points To Note When Making Adjustments; Adjusting The Safety Switch Position - Brother S-7220D Instruction Manual

7
Adjusting the sewing machine
(Standard adjustments)
Points to note when making
adjustments
CAUTION
• Secure the table so that it will not move
when tilting back the machine head. If
the table moves, it may crush your feet
or cause other injuries.
• Use both hands to hold the machine
head when tilting it back or returning it to
its original position. If only one hand is
used, the weight of the machine head
may cause your hand to slip, and your
hand may get caught.
• Turn off
disconnect the power cord plug before
carrying out inspection, adjustment or
repairs, or when replacing consumable
parts such as the rotary hook or knives.
The machine may operate if the treadle
is depressed by mistake, which could
result in injury.
• If the power switch needs to be left on
when carrying out some adjustment, be
extremely careful to observe all safety
precautions.
• Maintenance and inspection of the
sewing machine should only be carried
out by a qualified technician.
• Ask your Brother dealer or a qualified
electrician to carry out any maintenance
and inspection of the electrical system.
• If any safety
removed, be absolutely sure to re-install
them to their original positions and
check that they operate correctly before
using the machine.
• Always be sure to turn off the power
switch and then wait one minute before
opening the motor cover. If you touch
the surface of the motor, it may cause
burns.
Adjusting the safety switch
position
The standard amount of clearance between the
machine bed and the table hole is 1.5mm. If the
processing method used for the table leaves too much
space between the machine head and the table hole
(3.5 mm or more), it may adversely affect the operation
the power switch and
devices have been
of the safety switch (1). In such cases, adjust the
position of the safety switch (1).
• The safety switch (1) is normally installed as
shown in figure [A].
• If the stroke of the spring is small, the operation
of the safety switch (1) will become poorer, and
so the sewing machine may not operate even
when the treadle is depressed.
(1) Safety switch
(2) Washer
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