Brother BAS-311F-L - Manual (Page 50)

9. STANDARD ADJUSTMENTS
BAS-311F-0, 311F-L, 326F-0
43
(2)
(3)
Needle center line
0.01 - 0.08 mm
(1)
(2)
(1)
Tip
9-3. Adjusting the needle clearance
Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (1) and
turn the eccentric shaft (2) to adjust so that the clearance between the needle and the rotary hook is 0.01 - 0.08 mm.
9-4. Adjusting the driver needle guard
Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (2) and
turn the eccentric shaft (3) to adjust so that the driver needle guard (1) contacts the needle. If the needle contact
pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard (1) is not touching the
needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction.
9-5. Adjusting the shuttle race thread guide
Install the shuttle race thread guide (1) by pushing it in the direction of the arrow so that the needle groove is aligned with
the center of the needle plate hole.
Note
If the shuttle race thread guide is in the wrong position, thread breakages, soiled thread or catching of the thread may occur.
0138Q 1241S
1242S 0135Q
0140Q
1243S
(1)