Brother Z-8550A 사용자 매뉴얼

 

 

Z-8550A, 8560A 

84

 

The standard trailing length for the upper thread is 50-60 
mm. 
If adjustment is necessary, adjust the position of the wire e 
as described below. 

1.  Loosen the set screw (1). 
2.  Turn the base (2) to adjust the vertical position of the end 

of the wire (3). 

•  To increase the upper thread trailing amount, raise 

the position of the wire (3) without letting it touch the 
upper thread (4). 

•  To decrease the upper thread trailing amount, lower 

the position of the wire (3) without letting it touch the 
thread guide (5). 

3.  After adjusting, tighten the set screw (1). 

*  At this time, keep the end of the wire (3) 1 mm away 

from surface (A) of the thread guide (5). 

 
 
 
 
 
 
 
 
 
 

NOTE: 

If the tension of the pre-tension (6) is too strong, it will be more difficult to adjust the upper thread trailing amount. 
The pre-tension (6) should be adjusted to as weak a tension as possible while still allowing the rotary disc (7) to rotate 
smoothly. 

*  The thread tension will change at this time, so be sure to re-adjust the upper thread tension. (Refer to “9-1. Adjusting 

the thread tension” of the Instruction Manual.) 

•  The front corner of the thread wiper (2) should be 

positioned 9 mm away from the left edge of the needle 
hole of the presser foot (3) (or the needle hole of the 
needle plate (4)) when the solenoid plunger (1) is pushed 
up as far as it will go. 

•  Loosen the two screws (5) and move the setting plate (6) 

up or down to adjust. 

 

 

•  Adjust so that the distance from the bottom edge of the 

thread wiper (2) to the top of the needle plate (4) is 5 mm. 

•  Loosen the screw (7) and move the thread wiper (2) up or 

down to adjust. 

 

•  Adjust so that the edge of the thread wiper (2) is 

positioned 1 mm forward of the needle tip (8). 

•  Loosen the screw (7), and then turn the thread wiper (2) 

to adjust. 

3811M

Seen from direction (B)

Stronger 

Should not touch 

Longer 

Shorter 

Weaker

3812M