Brother BAS-311E Adjusting the needle clearance, Adjusting the driver needle guard, Adjustments

Chapter 4. Adjustments

3. Adjusting the needle clearance

	q
0.01 - 0.08mm	w

Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw q and turn the eccentric shaft w to adjust so that the clearance between the needle and the rotary hook is 0.01 - 0.08 mm.

4. Adjusting the driver needle guard

q

w e

Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw w and turn the eccentric shaft e to adjust so that the driver needle guard q contacts the needle. If the needle contact pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard q is not touching the needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction.

5. Adjusting the shuttle race thread guide

q

A

Install the shuttle race thread guide q 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.

52 BAS-311E.311EL.326E.326EL