Brother S-7300A Instruction Manual page 96

Single needle direct drive lock stitcher with electronic feeding system and thread trimmer

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12. STANDARD ADJUSTMENTS

Lowest position of

needle bar

Reference

line (a)

Direction of cam

rotation

1. Turn the machine pulley to raise the needle bar 6 mm

Raised 6 mm

from its lowest position (reference line (a) position) so

that reference line (b) is aligned with the bottom edge of

the needle bar bush.

Reference

line (b)

0958D

2. At the above position, push the plunger (1) of the thread

trimming solenoid with your finger in the direction of the

arrow.

Adjust the position of the thread trimmer cam (2) at this

time so that the roller shaft (4) of the thread trimming cam

lever assembly (3) touches the hollow (c) of the thread

trimmer cam (2) and so that the clearance between the

edge of the thread trimmer is 0.6 to 0.8 mm. (Fig. A)

3. Check that the clearance between the edge of the thread

trimmer cam (2) and the roller shaft (4) is 0.5 mm when

the roller shaft (4) returns to the right. (Fig. (B))

* Tighten the two set screws (5) to approximately 4 N.m.

0959D

S-7300A

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