9. STANDARD ADJUSTMENTS

9-2. Adjusting the needle and looper timing

The distance by which the needle bar rises from its lowest position to the position where the tip of the eye looper and the center of the needle are aligned should be the same as the distance from its lowest position to the position where the tip of the right looper and the center of the needle are aligned.

Before adjusting the looper timing, first adjust the stitch width (needle racking width).

* Refer to "Adjusting the needle racking width (stitch width)" on page 60. The standard width is 3 mm.

Lowest position

When center of needle and

of needle bar

looper tip are aligned

 

 

 

 

 

 

3075Q

0952Q

3076Q

1.Move the needle bar to its lowest position.

2.Use calipers to measure the distance between the end of the needle bar (1) and the top of the holder base (2) when the needle bar is at its lowest position.

3.Turn the upper shaft pulley until the tip of the eye looper (4) and the center of the needle (3) are aligned when the needle (3) is at the inside sewing position, and then use the calipers to take the same measurement as taken in step 2. Find the difference between the measurements taken in this step and in step 2.

4.Follow the same procedure as in step 3. above to find the difference between the two measurements when the needle (3) is at the outside sewing position.

*When the needle (3) is at the inside sewing position, the tip of the eye looper (4) should be aligned with the center of the needle (3), and when the needle (3) is at the outside sewing position, the tip of the right looper (5) should be aligned with the center of the needle (3).

*The distance from the end of the needle bar (1) and the top of the holder base (2) should be the same when the needle (3) is at both the inside sewing position and the outside sewing position.

 

 

 

 

 

 

 

 

 

 

3077Q

 

3078Q

 

5.If adjustment is necessary, turn the looper base (6) in the direction indicated by the arrow in the illustration, loosen the screw (7), and then move the looper link clamp (8) up or down to tilt the LS-holder bracket (9) to the left or right (in the direction of the arrow).

RH-981A

56

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Brother rh-918a manual Adjusting the needle and looper timing
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rh-918a specifications

The Brother RH-918A is a versatile and innovative machine tailored for both personal and professional use. As a robust electronic sewing machine, it combines functionality and user-friendly features that cater to a wide range of sewing enthusiasts, from beginners to advanced users.

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