ASSEMBLY .........................................; ADJUSTMENT ....................................; ELECTRICAL MECHANISM ...............- Page 7

BAS-311G, BAS-326G 

6. 

ASSEMBLY .........................................

 58

6-1.  Thread trimmer mechanism (1)  ...............   58 
6-2.  Intermittent presser foot lifter   

mechanism (1)  .........................................   60 

6-3.  Tension release mechanism .....................   60 
6-4.  Work clamp lifter mechanism   

(Solenoid specifications)  .........................   61 

6-5.  Work clamp lifter mechanism   

(Pneumatic specifications)  ......................   64 

6-6. Feed mechanism.......................................  66 
6-7. Feed covers ..............................................  73 
6-8.  Upper shaft mechanism ............................   75 
6-9. Needle bar mechanism .............................  77 
6-10. Intermittent presser foot lifter   

mechanism (2)  .........................................   79 

6-11. Lower shaft mechanism ............................   81 
6-12. Shuttle hook mechanism...........................   83 
6-13. Thread trimmer mechanism (2)  ...............   83 
6-14. Work clamp arm mechanism.....................   84 

6-14-1.  Adjustments after work clamp arm 

installation .........................................  85 

6-15. Thread  wiper mechanism..........................   86 
6-16. Covers.......................................................   87 

7. 

ADJUSTMENT ....................................

 88

7-1.  Checking the machine head switch...........   88 
7-2. Standard thread tension............................   89 

7-2-1.  Upper and lower thread tension ........   89 
7-2-2. Thread 

take-up spring.......................   90 

7-2-3. Arm 

thread guide R...........................   90 

7-3.  Adjusting the needle bar height.................   91 
7-4.  Adjusting the needle bar lift amount ..........   91 
7-5.  Adjusting the driver needle guard..............   91 
7-6.  Adjusting the needle clearance .................   92 
7-7.  Adjusting the shuttle race thread guide .....   92 
7-8.  Rotary hook lubrication amount.................   92 
7-9.  Adjusting the position of the movable   

knife ..........................................................  93 

7-10. Replacing the movable and fixed knives ...  95 

7-10-1.  Installing the feed plate......................  96 

7-11. Adjusting  the thread wiper .........................  97 
7-12. Presser foot installation position ................  97 
7-13. Changing the intermittent stroke................  98 
7-14. Adjusting the work clamp lift amount .........100 
7-15. Adjusting the air pressure   

(pneumatic specifications) .........................100 

7-16. Adjusting the thread trimmer cam   

position ......................................................101 

7-17. Belt tension adjustment .............................101 
7-18. Adjusting the tension release amount........102 
7-19. Adjusting the backlash of the lower   

shaft gear...................................................103 

7-20. Adjusting  the home position.......................104 

7-20-1.  Work clamp lift home position............104 
7-20-2. X-Y feed home position .....................105 

7-21. Adjusting the needle up stop home   

position ......................................................107 

7-22. Adjusting the needle up stop position ........108 

8. 

ELECTRICAL MECHANISM ...............

110

8-1.  Precautions while carrying out   

adjustments ...............................................110 

8-2.  Inside the control box and operation   

panel structure...........................................111 

8-3.  Description of fuses ...................................112 
8-4.  Description of connectors ..........................113 

8-4-1. Connector positions...........................113 
8-4-2.  Symptoms when there are poor   

connections .......................................116 

8-5. Troubleshooting.........................................119 

8-5-1. Diagnosis 

flowchart ...........................119 

8-5-2. Remedy .............................................123 

9. 

TABLE OF ERROR CODES ...............

137

10. 

TROUBLESHOOTING ......................

141

11. 

7-SEGMENT DISPLAY .....................

144