Hikari H9199, Инструкция по эксплуатации и каталог запасных частей

Страница: 63 / 99

INSTRUCTION MANUAL
- 51 -
9. STANDARD ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing machine
Should only be carried out by a qualified technician.
Ask your HIKARI dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
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.
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.
9-1 Adjusting the thread take-up spring
<
Thread take-up spring position
>
The standard position of the thread take-up spring(1) is
6-8 mm[4-6 mm for H specifications] above the surface
of the thread guide(3) when the presser foot(2) is lowered.
1) Lower the presser foot (2).
2) Loosen the set screw (4).
3) Turn the thread tension bracket (5) to adjust the spring
position.
4) Securely tighten the screw(4).
<
Thread take-up spring tension
>
The standard tension of the thread take-up(1) varies
In accordance with the machine specifications as
shown inthe table.
1) Push the needle(5) thread with your finger until it is
slightly higher than the thread tension bracket(5) and so
that theupper thread is not pulled out.
2) Pull the upper thread down until the thread
take-upspring(1) is at the same height as the base of the
thread guide(3), and then measure the tension of the
thread take-up spring(1).
3) Insert a screwdriver into the slot of the tension
stud(6), and turn the screwdriver to adjust the tension
of the thread take-up spring(1).
F specifications 0.1-0.24N
M specifications 0.25-0.35N
H specifications 0.3-0.5N
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.
·
When carrying out inspection, adjustment and
maintenance
·
When replacing consumable parts such as the rotary
Hook and knife
If the power switch needs to be left on when carrying
out some adjustment, be extremely careful to
Observe all safety precautions.