Adjustment Of The Bobbin Winder - Mitsubishi PLK-G6030 Technical Manual

7-8. Adjustment of the bobbin winder

(1) Adjustment of the winding volume
Adjust the amount of the winding thread with the subsidiary arm (No.1).
The winding volume is adjusted 80% of the full volume when the sewing machine is shipped from the
factory.
(2) Adjustment of the proper position of the bobbin winder
Firstly, loosen the setscrews (No.2) and (No.3) of the bobbin winder and put the empty bobbin (No.4)
on the rotating shaft (No.5) then, push the adjusting lever (No.6) to the arrow direction "a". Secondary,
move the whole bobbin winder to the arrow direction "b" and stop it at the position where the empty
bobbin is rotated then, tighten the setscrews (No.2) and (No.3) of the bobbin winder. This is the
proper position of the bobbin winder.
7-9. Adjustment of the work holder
7-9-1. Adjustment of the work holder presser
The work holder presser is generated by air pressure.
Control the air pressure with the adjusting knob (No.1) of
the air regulator located underneath the table.
If turn the adjusting knob (No.1) to the clockwise, the air
pressure is increased and the work holder pressure Is also
increased simultaneously. If turn the adjusting knob (No.1)
to the counterclockwise, the air pressure is decreased and
the work holder
simultaneously.
390kPa (4kgf/cm2) is the standard air pressure as a
normal sewing operation.
7-9-2. Changing the work holder
(1) Before changing the work holder (No.1), remove the holder block (No.4) that is secured with the
screw (No.3). It will come off by pressing the work holder (No.1) down from the area engaged with
the pin (No.6) of the work holder arm (No.5).
(2) Prepare another work holder and securely engaged its U shaped ditch (No.2) with the pin (No.6) of
the work holder arm (No.5). At this time, make sure that there is no play in the
 arrow direction.
<1>
pressure is also
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<4>
<2>
a
b
<6>
decreased
<5>
<3>