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Brother BAS-311G service manual Upper shaft mechanism, Disassembly, 5094Q

Models: BAS-311G

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5. DISASSEMBLY

5-6. Upper shaft mechanism

Be careful not to drop the needle bearing.

If the motor assembly cannot be removed, insert bolts into these two tapping holes and gradually tighten them to remove the motor assembly.

5094Q


1.	Screw (Loosen)		16.	Set screws [2 pcs] (Loosen)
2.	Set screw (Loosen)		17.	Set screws [2 pcs] (Loosen)
3.	Thread take-up crank		18.	Set screws [2 pcs] (Loosen)
4.	Screws [3 pcs] (Loosen)		19.	Screws [3 pcs] (Loosen)
5.	Crank cover		20.	Fries wheels [2 pcs]
6.	Bolts [2 pcs]		21.	Bolts [4 pcs] (Loosen)
7.	Crank rod [Upper part]		22.	Motor assy
8.	Needle bearing		23.	Thread trimmer cam
9.	Crank rod [Lower part] (Lower downward)		24.	Joint assy
10.		Rubber cap	25.	Upper shaft
11.		Set screws [2 pcs] (Loosen)	26.	Pulley gear R
12.		Set screws [2 pcs] (Loosen)	27.	Bobbin winder driving wheel
13.		Set screws [2 pcs] (Loosen)	28.	Stepping clamp cam assy
14.		Set screws [2 pcs] (Loosen)	29.	Set screw (Loosen)
15.		Set screws [2 pcs] (Loosen)	30.	Pulley assy

BAS-311G, BAS-326G

Page 54

Image 54

Brother BAS-311G service manual Upper shaft mechanism, Disassembly, 5094Q

Contents

BAS-311G BAS-326G SERVICE MANUALPlease read this manual before making any adjustments PROGRAMMABLE ELECTRONIC PATTERN SEWERSymbols SAFETY INSTRUCTIONS1 Safety indications and their meanings IndicationsDANGER Installation2 Notes on safety Environmental requirementsSewing CleaningMaintenance and inspection If an error occurs in machine operation, or if abnormalTension release 3 Warning labelsMotor cover solenoid coverFUNCTION SETTINGS CONTENTSSPECIFICATIONS DISASSEMBLY9. TABLE OF ERROR CODES 6. ASSEMBLY7. ADJUSTMENT 10. TROUBLESHOOTING1. SPECIFICATIONS 1. SPECIFICATIONS2. FUNCTION SETTINGS 2-1. List of special functions when power is turned on2. FUNCTION SETTINGS When SPEED indicator is illuminated 2-2. List of advanced functions2. FUNCTION SETTINGS 4550Qmemory switches that have been changed from 2-3. Memory switch setting method Advanced2. FUNCTION SETTINGS default settingsInitial value 2-4. List of memory switch settings2. FUNCTION SETTINGS rangeFor solenoid specifications 1 pedal 2. FUNCTION SETTINGSWork clamp settings For pneumatic specifications 2 pedal2. FUNCTION SETTINGS Thread winding2. FUNCTION SETTINGS Sewing machine motor settings2. FUNCTION SETTINGS Feed settings2. FUNCTION SETTINGS Operation panel settingsUser program settings 2. FUNCTION SETTINGS Data editing settingsDevice settings 2. FUNCTION SETTINGS Maintenance settings 2. FUNCTION SETTINGSError processing settings Specifications and destination settingsUnique machine settings 2-5. Setting the work clamp mode2. FUNCTION SETTINGS Solenoid specifications, single pedal standard operationsPneumatic specifications, 2 pedal standard operations 2-6. Stitch counter checking method2. FUNCTION SETTINGS Pneumatic specifications, 2 pedal sequence operation2-7. Error history checking method 2. FUNCTION SETTINGSE − − − Input check list 2-8. Input checking method2. FUNCTION SETTINGS Name2. FUNCTION SETTINGS − − − −2. FUNCTION SETTINGS 4567Q 2-9. Output checking method2. FUNCTION SETTINGS 4441Q 4953Q2. FUNCTION SETTINGS Panel CPU 2-10. Software version checking method2. FUNCTION SETTINGS ProgrammerSewing machine internal memory 3. READING / WRITING DATA3-1. Handling data 3. READING / WRITING DATA3-2. Notes on handling CF cards sold separately 3-3. Structure of a CF card folder3. READING / WRITING DATA Switch to data read/write mode 3-4. Data read/write modeTurn on the power switch 3. READING / WRITING DATA3. READING / WRITING DATA 3-5. Reading sewing data from CF cardsWhen memory switch No. 755 is ON End data read/write mode3. READING / WRITING DATA When memory switch No. 755 is ON3-6. Writing sewing data to CF cards Select the w 2 data read/write mode3. READING / WRITING DATA 3-7. Reading memory switch data from CF cards3-8. Writing memory switch data to CF cards End data read/write mode3. READING / WRITING DATA 3-9. Reading user program data from CF cards3-10. Writing user program data to CF cards End data read/write mode3-11. Updating the control program Restoring the control program if an error occurs during updating3. READING / WRITING DATA 3. READING / WRITING DATA 3-12. Writing error log data to CF card3-13. Reading sewing data from floppy disks End data read/write mode5 End data read/write mode 3-14. Writing sewing data to floppy disks3. READING / WRITING DATA 1 Insert the floppy disk into the floppy disk drive3-15. Reading extended option output data from a CF card 3. READING / WRITING DATA5 End data read/write mode 3. READING / WRITING DATA 3-16. Writing extended option output data to CF cards3-17. Reading extended option output data from floppy disks 3 End data read/write mode4-2. Lower shaft and shuttle race mechanisms 4. MECHANICAL DESCRIPTIONS4-1. Needle bar and thread take-up mechanisms 4. MECHANICAL DESCRIPTIONS4-3. Work clamp lifter mechanism Solenoid specifications 4. MECHANICAL DESCRIPTIONS4. MECHANICAL DESCRIPTIONS 4-4. Work clamp lifter mechanism Pneumatic specifications4-5. Intermittent presser foot lifter mechanism 5045Q4. MECHANICAL DESCRIPTIONS 4-6. Intermittent presser foot stroke mechanism4. Stepping clamp connecting rod 5. Stepping clamp arm R 1. Motor assy 2. Upper shaft 3. Stepping clamp camY direction 4-7. Feed mechanismX direction 4. MECHANICAL DESCRIPTIONS4. MECHANICAL DESCRIPTIONS 4-8. Thread trimmer mechanism11. Movable knife lever 12. Movable knife connecting plate 1. Thread trimmer solenoid 2. Solenoid lever 3. Pushing lever4. MECHANICAL DESCRIPTIONS 4-9. Tension release mechanism4-10. Thread wiper mechanism BAS-311G, BAS-326G5. DISASSEMBLY 5-1. Covers5. DISASSEMBLY 2. STOP switch harness Pull out 3. Bolt 4. Plain washer 5-2. Thread wiper mechanism5. DISASSEMBLY 1. Thread wiper solenoid harness Pull out5. DISASSEMBLY Pneumatic specifications5-3. Work clamp arm mechanism BAS-311G, BAS-326G5-4. Intermittent presser foot lifter mechanism 5. DISASSEMBLYPresser bar Pull downward from presser bar clamp 5092Q 5-5. Needle bar mechanism5. DISASSEMBLY 5093Q5-6. Upper shaft mechanism 5. DISASSEMBLY5094Q 5-7. Lower shaft mechanism 5. DISASSEMBLYBAS-311G, BAS-326G 5-8. Feed covers5. DISASSEMBLY 5101Q5-9. Feed mechanism 5. DISASSEMBLY5. DISASSEMBLY 26. Bolts with washer 3 pcs 27. X-feed motor assy47. Bolts 16 pcs 48. X-LM guide 2 pcs 49. Bolts 2 pcs 5. DISASSEMBLY44. Bolts 10 pcs 45. Flat screws 8 pcs 46. Feed bracket 50. X-belt holder 51. X-belt holder plate 52. Bolts 2 pcs5-10. Work clamp lifter mechanism Solenoid specifications 5. DISASSEMBLY5108Q 5-11. Work clamp lifter mechanism Pneumatic specifications 5. DISASSEMBLY5. DISASSEMBLY 5-12. Tension release mechanism5-13. Intermittent presser foot lifter mechanism Solenoid setting plate5-14. Thread trimmer mechanism 5. DISASSEMBLYThread trimmer collar 5-15. Shuttle hook mechanism 5. DISASSEMBLY6. ASSEMBLY 6-1. Thread trimmer mechanism6. ASSEMBLY Bolts with washer 2 pcs 6. ASSEMBLYApply grease 4853Q6. ASSEMBLY 6-2. Intermittent presser foot lifter mechanism6-3. Tension release mechanism Stepping clamp lifter rod adjustment6-4. Work clamp lifter mechanism Solenoid specifications 6. ASSEMBLYIndex mark Align 6. ASSEMBLYWork clamp lifter plate assy 5162Q6. ASSEMBLY Hook the spring into the arm hole as shown in the illustration5168Q 6-5. Work clamp lifter mechanism Pneumatic specifications6. ASSEMBLY 5169Q5171Q 6. ASSEMBLY5170Q 5172Q6-6. Feed mechanism 6. ASSEMBLY5176Q 6. ASSEMBLYFlat screws 8 pcs 5215Q6. ASSEMBLY 5178Q5179Q Install so that the backlash is 0.01 53. X-feed motor assy 6. ASSEMBLYInstall so that the backlash is 0.01 54. Bolts with washer 3 pcs Temporarily tighten6. ASSEMBLY X-GT belt tension adjustmentMeasurement position 6. ASSEMBLY Y-GT belt tension adjustment 5184QRight Y-LM guide installation 6. ASSEMBLYInside X-LM guide installation 5185Q6-7. Feed covers 6. ASSEMBLYBAS-311G, BAS-326G 6. ASSEMBLYNeedle plate 5191Q6-8. Upper shaft mechanism 6. ASSEMBLY6. ASSEMBLY Install the motor assembly so that the harness is facing downward6-9. Needle bar mechanism 6. ASSEMBLYInside hole 6. ASSEMBLY 18. Needle bar clamp 19. Needle bar Insert from above 20. Screw6-10. Intermittent presser foot lifter mechanism 6. ASSEMBLY6. ASSEMBLY 3. Lower the needle bar approximately 6.5 mm from its highest position6-11. Lower shaft mechanism 6. ASSEMBLY6. ASSEMBLY Check that the machine pulley turns smoothly 12. Lower shaft assy6. ASSEMBLY 6-12. Shuttle hook mechanism6-13. Thread trimmer mechanism connecting plate6. ASSEMBLY 6-14. Work clamp arm mechanismPneumatic specifications 1. Feed plate 2. Bolts with washer 2pcs 3. Work clamp assyRetainer adjustment 6-14-1. Adjustments after work clamp arm installation6. ASSEMBLY Work clamp height adjustment Solenoid specifications6-15. Thread wiper mechanism 6. ASSEMBLY6-16. Covers 6. ASSEMBLY5154Q 7. ADJUSTMENT 7-1. Checking the machine head switch7. ADJUSTMENT 7-2. Standard thread tension 7-2-1. Upper and lower thread tension7. ADJUSTMENT 7. ADJUSTMENT 7-2-2. Thread take-up spring7-2-3. Arm thread guide R Thread take-up spring height7-5. Adjusting the driver needle guard 7-3. Adjusting the needle bar height7-4. Adjusting the needle bar lift amount 7. ADJUSTMENT7-8. Rotary hook lubrication amount 7-6. Adjusting the needle clearance7-7. Adjusting the shuttle race thread guide 7. ADJUSTMENT7-9. Adjusting the position of the movable knife 7. ADJUSTMENT7. ADJUSTMENT 7. Turn the pulley 1 by hand to move the needle bar to its lowest position7-10. Replacing the movable and fixed knives 7. ADJUSTMENTEnd feed plate installation mode 7-10-1. Installing the feed plate7. ADJUSTMENT All indicators switch off7-11. Adjusting the thread wiper 7-12. Presser foot installation position7. ADJUSTMENT 7-13. Changing the intermittent stroke 7. ADJUSTMENTChanging the installation position of stepping clamp link A 7. ADJUSTMENT Stepping clamp connecting rod position adjustment 7. ADJUSTMENT 7-14. Adjusting the work clamp lift amount7-15. Adjusting the air pressure pneumatic specifications Solenoid specifications7. ADJUSTMENT 7-16. Adjusting the thread trimmer cam position7-17. Belt tension adjustment X-GT belt7-18. Adjusting the tension release amount 7. ADJUSTMENT Y-GT belt7-19. Adjusting the backlash of the lower shaft gear 7. ADJUSTMENT7. ADJUSTMENT 7-20. Adjusting the home position7-20-1. Work clamp lift home position Solenoid specificationsRepeat steps 4 and 5 to adjust the home position 7-20-2. X-Y feed home position7. ADJUSTMENT End adjustment modeEnd adjustment mode 7. ADJUSTMENTRepeat steps 5 and 6 to adjust the home position 5208Q 5276Q5209Q 7-21. Adjusting the needle up stop home position7. ADJUSTMENT 4700Q7-22. Adjusting the needle up stop position 7. ADJUSTMENTAdjustment method 7. ADJUSTMENT End adjustment modeDANGER 8-1. Precautions while carrying out adjustments8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM8. ELECTRICAL MECHANISM 8-2. Inside the control box and operation panel structurePower supply motor P.C. board Main P.C. board8-3. Description of fuses 8. ELECTRICAL MECHANISM4590Q 8. ELECTRICAL MECHANISM 8-4. Description of connectors8-4-1. Connector positions Main P.C. boardBAS-311G, BAS-326G Power supply motor P.C. board8. ELECTRICAL MECHANISM PMD P.C. board 4592Q8. ELECTRICAL MECHANISM Panel P.C. board BAS-311G, BAS-326G4594Q Feed mechanism 8-4-2. Symptoms when there are poor connections8. ELECTRICAL MECHANISM Work clamp mechanismSewing operations 8. ELECTRICAL MECHANISMThread trimming mechanism 4713Q 5243Q 4714Q8. ELECTRICAL MECHANISM Other5245Q 5246Q 5247Q 5248Q 5249Q Description of symbols 8-5. Troubleshooting8-5-1. Diagnosis flowchart “Problem” symbol in the “8-5-2. Remedy” lists8. ELECTRICAL MECHANISM BAS-311G, BAS-326G5251Q 8. ELECTRICAL MECHANISM BAS-311G, BAS-326G5252Q 8. ELECTRICAL MECHANISM BAS-311G, BAS-326G5253Q DANGER 8-5-2. RemedyBefore carrying out adjustment 8. ELECTRICAL MECHANISM4877Q 8. ELECTRICAL MECHANISM4876Q 4878Q8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 5086Q5087Q 8. ELECTRICAL MECHANISM 4885Q8. ELECTRICAL MECHANISM 4886Q4884Q 8. ELECTRICAL MECHANISM Work clamp does not rise4888Q 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 4890Q 8. ELECTRICAL MECHANISM4889Q 4891Q5089Q 8. ELECTRICAL MECHANISM5088Q 4892QSwitch-related errors 9. TABLE OF ERROR CODES9. TABLE OF ERROR CODES DANGERWork clamp-related errors 9. TABLE OF ERROR CODES Upper shaft motor-related errorsFeed mechanism-related errors E110E401 9. TABLE OF ERROR CODESCommunication and memory-related errors E402P.C. board-related errors 9. TABLE OF ERROR CODES Data editing-related errorsDevice-related errors E500Problem 10. TROUBLESHOOTING10. TROUBLESHOOTING CauseCause 10. TROUBLESHOOTINGProblem Remedypower is turned on and 10. TROUBLESHOOTINGProblem switch11. 7-SEGMENT DISPLAY 11. 7-SEGMENT DISPLAYBAS-311G, BAS-326G I5060885B SERVICE MANUALPrinted in Japan 2005.07. B