Brother BAS-300G-484/484SF Manual De Propietario

4. PREPARATION BEFORE SEWING 

 

 

25 

KE-430D, BE-438D

Do not touch any of the moving parts or press any objects against the machine while winding the lower thread, as this may 

result in personal injury or damage to the machine.

 

 

1.  Place the bobbin onto the bobbin winder shaft (1). 

2.  Thread the thread as shown in the illustration, wind the 

thread around the bobbin several times, and then press the 

bobbin presser arm(2). 

3.  Turn on the power switch. 

4. Depress the foot switch to the second step. The feed 

mechanism will move to the home position. 

5.  Check that the needle is not touching the work clamp, and 

then while pressing the TENSION WIND key (3), depress 

the foot switch to the second step. 

6.  Release the TENSION WIND key (3) after the machine 

starts operating, and keep depressing the foot switch until 

the lower thread stops being wound onto the bobbin. 

(If you release the foot switch before winding is complete, 

and then depress it again while pressing the TENSION/ 

WIND key (3), winding will start again.)   

7.  Once winding of the set amount of lower thread (80 - 90% of 

the bobbin capacity) is completed, the bobbin presser arm 

(2) will return automatically. 

8.  Remove the bobbin, hook the thread onto the knife (4), and 

then pull the bobbin in the direction of the arrow to cut the 

thread. 

 

 

 

 

 

 

 

 

 

 

 

 

 

Loosen the screw (5) and move the bobbin presser (6). 

 

 

 

 

 

 

 

 

 

 

Loosen the set screw (7) and move the bobbin wider tension 

assembly (8) up and down to adjust. 

*  For case A, move the bobbin winder tension assembly (8) 

down, and for case B, move it upward. 

 

 

 

 

 

 

4471Q 

4429Q 

4432Q 

4431Q 4430Q

Case  Ｂ 

Case  Ａ