Atlanta Attachment Company 4300AC, Technical Manual & Parts Lists

Page: 47 / 168

Technical Manual & Parts Lists
40
5.- Adjusting the needle guards
1. Adjusting the overlock needle guards
•When the point of the lower looper has reached the
center line of the overlock needle from the left, check to
see if the needle is deflected 0-0.03mm toward the
operator by the lower looper. (Refer to page 38
“ADJUSTING THE LOWER LOOPER” for this
adjustment.)
•To adjust rear needle guard (1)
In the above condition, adjust rear needle guard (1) so
that the needle is deflected by rear needle guard (1) and
clearance (a) is 0-0.05mm. To make this adjustment,
loosen screw (2) and move rear needle guard (1) front or
back as required.
•To adjust front needle guard (3)
When the point of the lower looper is at the center line of
the needle and the needle is deflected most by rear needle
guard (1), clearance (b) between the needle and front
needle guard (3) should be 0.1-0.2mm.
To make this adjustment, loosen screws (4) and front
move needle guard (3) front or back as required.
2. Adjusting the double chain stitch needle guards
•To adjust rear needle guard (5)
When the double chain stitch needle is at the lowest
position of its stroke, clearance © between the double
chain stitch needle and rear needle guard (5)should be
0mm-0.05mm.
To make this adjustment, loosen screws (5) and move
rear needle guard (5) front Or back as required.
•To adjust front needle guard (7)
Adjust clearance (d) between the double chain stitch
front needle and needle guard (7) to 0.05mm-0.1mm.
To make this adjustment, loosen screw (8) and move
front needle guard (7) front Or back as required.
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