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HE-800A
10. STANDARD ADJUSTMENTS
72
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. STANDARD ADJUSTMENTS
CAUTION
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.
Turn off the power switch and disconnect the
power cord from the wall outlet at the following
times, otherwise the machine may operate if the
treadle is depressed by mistake, which could
result in injury.
x When carrying out inspection, adjustment and
maintenance
x When replacing consumable parts such as the
rotary hook
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.
If the power switch needs to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Note:
x The pulse motor may become hot. Be careful not to touch it when tilting back the machine head.
x The feed pulse motor cooling fan spins while the machine power supply is turned on. Be careful of this when
tilting back the machine head.
x Take care when handling the knife.
Turn on the power, and after the sewing machine returns to the home position, press the RESET key before carrying
out the following adjustments.
* The work clamp will lowered and " ¯AdJ " will appear in the parameter display LED. The sewing machine will not
operate when the treadle is depressed at this time.
“10-1. Adjusting the needle bar height”
“10-2. Adjusting the needle and hook timing”
“10-3. Adjusting the clearance between needle and hook point”
“10-7-2. Adjusting the upper thread scissors opening timing”
“10-9. Adjusting the bobbin presser”
Turn off the power supply before carrying out all but the above tasks.
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. Adjusting the needle bar height
1. Set the sewing machine to the home position and
then press the RESET key.
2. Set the needle bar (1) to its lowest position.
3. Remove the rubber cap (2) from the face plate, and
then loosen the set screw (3) of the needle bar clamp.
4. Insert the “1” part of the gauge (4) between the needle
plate (5) and the lower edge of the needle bar (1), and
touch the needle bar against the gauge.
5. Tighten the set screw (3).
6. Install the rubber cap (2).
* Different gauges are used for each of the two
specifications -2 and -3, so make sure that the gauge
being used matches the specifications and application
for the sewing machine being adjusted.
3972Q