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Fig
5
4.4 Hejght adjustment setting of p�esser wheel (Fig 6)
The height o:presser whool c¥ be adjusted by fuming l a 10b (301 ).
To set the height of presser w�eel, proceed as follows
--Turning the knob(301) in the cf ockwise direction , the presser whool(3 l 5)
will be moved downward .Anffturning the knob(301) in the anti-:clockwise
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direction , the presser whool(3 � 5) will be moved upward.
4.5 Pressure adjustment setting of presser wheel (Fig
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The pressure ofpresser
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holder's(307) position.
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To set the pressure of presser wheel, proceed as follows
--,
Loosen the screws of the pres�er bar holder(307).
-- moving the presser bar holder(307) upward will increas�the pressure of the
presser whoo1(3 l 5) and moving press bar holder(307) downward will
reduce the pressure of the pre�ser whool(31 S).
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REPLACEMENT AND
5�1 Adjustment of the distance between two needles
There have two kinds of crank(236A/236B) can be.used on GR -81, So that
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the diatance between hvo needles can be 7.5nim·Or
between two needles will be 7 .Stjnn if the crank(236A) is used
distance between two needles will be 5.5mm if the crank(236B) is used.
To replace the crank(236A/23(jB),proceed as follows(Fig 7).
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Loosen the screw 1 of the comiecting lever(235) and screw 2 of the
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eccentric pin(238),
-- Loosen the screws 3 of the crank(236A/236B).
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Remove the crank(236A/236B V from shaft (�04).
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Fix another crank (236A/236B � on shaft(404).
-- After replacement, fix all the parts that described above and tighten the
screws agam.
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Presser bar
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holder ( 307 )
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3
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whool)
c an be adjusted by moving presser bar
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ADJUSTMENT·
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Fig6
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6)
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5.5mm .
The distance
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