11
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7
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SPREADER
7-1 Position of the spreader
■
Height
The distance between the top surface of the needle plate
and the bottom surface of the spreader should be 9~11mm.
■
Left-to-right position:
When the spreader is at the extreme left end of its travel,
the distance between the center of the left needle and the
point of the thread carrying notch should be 4.5~5.5mm.
When the spreader passes the left needle, the distance
between the point of the thread carrying notch and the left
needle should be 0.5~0.8mm.
To make the above adjustment, loosen screws A and B.
■
Adjust the amount of the spreader movement according to the number of spreader threads
and/or the fabric weight to make this adjustment, remove the arm top cover, loosen nut C
and then move the adjusting lever pin in direction (a) or (b).
To decrease the amount, move the pin in the direction of (a).
To increase the amount, move the pin in the direction of (b).
7-2 Position of the spreader thread guide
The clearance between spreader thread guide B and
spreader A should be 0.5~0.8mm.
When the spreader is at the extreme right end of its travel,
point (a) of the spreader thread carrying notch should be
aligned with the center line of the slot of spreader thread
guide B. When the needle bar is at the bottom of its
stroke, the clearance between the spreader thread guide
and spreader thread guide C should be 1mm and the eyelet
of spreader thread guide C should be approximately
0.5mm left to the center line of the slot of spreader thread
guide B. To make the above adjustment, loosen two
screws D and screw E and move each thread guide up or
down, left or right, or front or back as required.
From the library of: Superior Sewing Machine & Supply LLC
