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10. STANDARD ADJUSTMENTS

 

 

￿

 

￿￿. STANDARD ADJUSTMENTS

￿CAUTION

Maintenance and inspection of the sewing

Use both hands to hold the machine head when

machine should only be carried out by a qualified

tilting it back or returning it to its original position.

technician.￿

If only one hand is used, the weight of the

Ask your Brother dealer or a qualified electrician

machine head may cause your hand to slip, and

to carry out any maintenance and inspection of

your hand may get caught.￿

the electrical system.￿

If the power switch needs to be left on when

Turn off the power switch and disconnect the

carrying out some adjustment, be extremely

power cord from the wall outlet at the following

careful to observe all safety precautions.￿

times, otherwise the machine may operate if the

If any safety devices have been removed, be

treadle is depressed by mistake, which could

absolutely sure to re-install them to their original

result in injury.￿

positions and check that they operate correctly

￿ When carrying out inspection, adjustment and

before using the machine.￿

maintenance￿

 

￿ When replacing consumable parts such as the

 

rotary hook￿

 

 

 

Note:

￿The pulse motor may become hot. Be careful not to touch it when tilting back the machine head.

￿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.

￿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.

￿￿-￿. 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

HE-800A

72