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Brother service manual Electrical Mechanism, BAS-311G, BAS-326G, 5251Q

Models: BAS-311G

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8. ELECTRICAL MECHANISM

5251Q

120	BAS-311G, BAS-326G

Page 127

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Brother service manual Electrical Mechanism, BAS-311G, BAS-326G, 5251Q

Contents

PROGRAMMABLE ELECTRONIC PATTERN SEWER SERVICE MANUALPlease read this manual before making any adjustments BAS-311G BAS-326GIndications SAFETY INSTRUCTIONS1 Safety indications and their meanings SymbolsEnvironmental requirements Installation2 Notes on safety DANGERIf an error occurs in machine operation, or if abnormal CleaningMaintenance and inspection Sewingsolenoid cover 3 Warning labelsMotor cover Tension releaseDISASSEMBLY CONTENTSSPECIFICATIONS FUNCTION SETTINGS10. TROUBLESHOOTING 6. ASSEMBLY7. ADJUSTMENT 9. TABLE OF ERROR CODES1. SPECIFICATIONS 1. SPECIFICATIONS2-1. List of special functions when power is turned on 2. FUNCTION SETTINGS2. FUNCTION SETTINGS 4550Q 2-2. List of advanced functions2. FUNCTION SETTINGS When SPEED indicator is illuminateddefault settings 2-3. Memory switch setting method Advanced2. FUNCTION SETTINGS memory switches that have been changed fromrange 2-4. List of memory switch settings2. FUNCTION SETTINGS Initial valueFor pneumatic specifications 2 pedal 2. FUNCTION SETTINGSWork clamp settings For solenoid specifications 1 pedalThread winding 2. FUNCTION SETTINGSSewing machine motor settings 2. FUNCTION SETTINGSFeed settings 2. FUNCTION SETTINGSOperation panel settings 2. FUNCTION SETTINGSUser program settings Data editing settings 2. FUNCTION SETTINGSDevice settings 2. FUNCTION SETTINGS Specifications and destination settings 2. FUNCTION SETTINGSError processing settings Maintenance settingsSolenoid specifications, single pedal standard operations 2-5. Setting the work clamp mode2. FUNCTION SETTINGS Unique machine settingsPneumatic specifications, 2 pedal sequence operation 2-6. Stitch counter checking method2. FUNCTION SETTINGS Pneumatic specifications, 2 pedal standard operations2. FUNCTION SETTINGS 2-7. Error history checking methodE − − − Name 2-8. Input checking method2. FUNCTION SETTINGS Input check list− − − − 2. FUNCTION SETTINGS2. FUNCTION SETTINGS 4441Q 4953Q 2-9. Output checking method2. FUNCTION SETTINGS 4567Q2. FUNCTION SETTINGS Programmer 2-10. Software version checking method2. FUNCTION SETTINGS Panel CPU3. READING / WRITING DATA 3. READING / WRITING DATA3-1. Handling data Sewing machine internal memory3-3. Structure of a CF card folder 3-2. Notes on handling CF cards sold separately3. READING / WRITING DATA 3. READING / WRITING DATA 3-4. Data read/write modeTurn on the power switch Switch to data read/write modeEnd data read/write mode 3-5. Reading sewing data from CF cardsWhen memory switch No. 755 is ON 3. READING / WRITING DATASelect the w 2 data read/write mode When memory switch No. 755 is ON3-6. Writing sewing data to CF cards 3. READING / WRITING DATAEnd data read/write mode 3-7. Reading memory switch data from CF cards3-8. Writing memory switch data to CF cards 3. READING / WRITING DATAEnd data read/write mode 3-9. Reading user program data from CF cards3-10. Writing user program data to CF cards 3. READING / WRITING DATARestoring the control program if an error occurs during updating 3-11. Updating the control program3. READING / WRITING DATA End data read/write mode 3-12. Writing error log data to CF card3-13. Reading sewing data from floppy disks 3. READING / WRITING DATA1 Insert the floppy disk into the floppy disk drive 3-14. Writing sewing data to floppy disks3. READING / WRITING DATA 5 End data read/write mode3. READING / WRITING DATA 3-15. Reading extended option output data from a CF card5 End data read/write mode 3 End data read/write mode 3-16. Writing extended option output data to CF cards3-17. Reading extended option output data from floppy disks 3. READING / WRITING DATA4. MECHANICAL DESCRIPTIONS 4. MECHANICAL DESCRIPTIONS4-1. Needle bar and thread take-up mechanisms 4-2. Lower shaft and shuttle race mechanisms4. MECHANICAL DESCRIPTIONS 4-3. Work clamp lifter mechanism Solenoid specifications5045Q 4-4. Work clamp lifter mechanism Pneumatic specifications4-5. Intermittent presser foot lifter mechanism 4. MECHANICAL DESCRIPTIONS1. Motor assy 2. Upper shaft 3. Stepping clamp cam 4-6. Intermittent presser foot stroke mechanism4. Stepping clamp connecting rod 5. Stepping clamp arm R 4. MECHANICAL DESCRIPTIONS4. MECHANICAL DESCRIPTIONS 4-7. Feed mechanismX direction Y direction1. Thread trimmer solenoid 2. Solenoid lever 3. Pushing lever 4-8. Thread trimmer mechanism11. Movable knife lever 12. Movable knife connecting plate 4. MECHANICAL DESCRIPTIONSBAS-311G, BAS-326G 4-9. Tension release mechanism4-10. Thread wiper mechanism 4. MECHANICAL DESCRIPTIONS5-1. Covers 5. DISASSEMBLY5. DISASSEMBLY 1. Thread wiper solenoid harness Pull out 5-2. Thread wiper mechanism5. DISASSEMBLY 2. STOP switch harness Pull out 3. Bolt 4. Plain washerBAS-311G, BAS-326G Pneumatic specifications5-3. Work clamp arm mechanism 5. DISASSEMBLY5. DISASSEMBLY 5-4. Intermittent presser foot lifter mechanismPresser bar Pull downward from presser bar clamp 5093Q 5-5. Needle bar mechanism5. DISASSEMBLY 5092Q5. DISASSEMBLY 5-6. Upper shaft mechanism5094Q 5. DISASSEMBLY 5-7. Lower shaft mechanism5101Q 5-8. Feed covers5. DISASSEMBLY BAS-311G, BAS-326G5. DISASSEMBLY 5-9. Feed mechanism26. Bolts with washer 3 pcs 27. X-feed motor assy 5. DISASSEMBLY50. X-belt holder 51. X-belt holder plate 52. Bolts 2 pcs 5. DISASSEMBLY44. Bolts 10 pcs 45. Flat screws 8 pcs 46. Feed bracket 47. Bolts 16 pcs 48. X-LM guide 2 pcs 49. Bolts 2 pcs5. DISASSEMBLY 5-10. Work clamp lifter mechanism Solenoid specifications5108Q 5. DISASSEMBLY 5-11. Work clamp lifter mechanism Pneumatic specificationsSolenoid setting plate 5-12. Tension release mechanism5-13. Intermittent presser foot lifter mechanism 5. DISASSEMBLY5. DISASSEMBLY 5-14. Thread trimmer mechanismThread trimmer collar 5. DISASSEMBLY 5-15. Shuttle hook mechanism6-1. Thread trimmer mechanism 6. ASSEMBLY6. ASSEMBLY 4853Q 6. ASSEMBLYApply grease Bolts with washer 2 pcsStepping clamp lifter rod adjustment 6-2. Intermittent presser foot lifter mechanism6-3. Tension release mechanism 6. ASSEMBLY6. ASSEMBLY 6-4. Work clamp lifter mechanism Solenoid specificationsIndex mark 5162Q 6. ASSEMBLYWork clamp lifter plate assy AlignHook the spring into the arm hole as shown in the illustration 6. ASSEMBLY5169Q 6-5. Work clamp lifter mechanism Pneumatic specifications6. ASSEMBLY 5168Q5172Q 6. ASSEMBLY5170Q 5171Q6. ASSEMBLY 6-6. Feed mechanism5215Q 6. ASSEMBLYFlat screws 8 pcs 5176Q5178Q 6. ASSEMBLY5179Q 54. Bolts with washer 3 pcs Temporarily tighten 6. ASSEMBLYInstall so that the backlash is 0.01 Install so that the backlash is 0.01 53. X-feed motor assyX-GT belt tension adjustment 6. ASSEMBLYMeasurement position 5184Q 6. ASSEMBLY Y-GT belt tension adjustment5185Q 6. ASSEMBLYInside X-LM guide installation Right Y-LM guide installation6. ASSEMBLY 6-7. Feed covers5191Q 6. ASSEMBLYNeedle plate BAS-311G, BAS-326G6. ASSEMBLY 6-8. Upper shaft mechanismInstall the motor assembly so that the harness is facing downward 6. ASSEMBLY6. ASSEMBLY 6-9. Needle bar mechanismInside hole 18. Needle bar clamp 19. Needle bar Insert from above 20. Screw 6. ASSEMBLY6. ASSEMBLY 6-10. Intermittent presser foot lifter mechanism3. Lower the needle bar approximately 6.5 mm from its highest position 6. ASSEMBLY6. ASSEMBLY 6-11. Lower shaft mechanismCheck that the machine pulley turns smoothly 12. Lower shaft assy 6. ASSEMBLYconnecting plate 6-12. Shuttle hook mechanism6-13. Thread trimmer mechanism 6. ASSEMBLY1. Feed plate 2. Bolts with washer 2pcs 3. Work clamp assy 6-14. Work clamp arm mechanismPneumatic specifications 6. ASSEMBLYWork clamp height adjustment Solenoid specifications 6-14-1. Adjustments after work clamp arm installation6. ASSEMBLY Retainer adjustment6. ASSEMBLY 6-15. Thread wiper mechanism6. ASSEMBLY 6-16. Covers5154Q 7-1. Checking the machine head switch 7. ADJUSTMENT7. ADJUSTMENT 7-2-1. Upper and lower thread tension 7-2. Standard thread tension7. ADJUSTMENT Thread take-up spring height 7-2-2. Thread take-up spring7-2-3. Arm thread guide R 7. ADJUSTMENT7. ADJUSTMENT 7-3. Adjusting the needle bar height7-4. Adjusting the needle bar lift amount 7-5. Adjusting the driver needle guard7. ADJUSTMENT 7-6. Adjusting the needle clearance7-7. Adjusting the shuttle race thread guide 7-8. Rotary hook lubrication amount7. ADJUSTMENT 7-9. Adjusting the position of the movable knife7. Turn the pulley 1 by hand to move the needle bar to its lowest position 7. ADJUSTMENT7. ADJUSTMENT 7-10. Replacing the movable and fixed knivesAll indicators switch off 7-10-1. Installing the feed plate7. ADJUSTMENT End feed plate installation mode7-12. Presser foot installation position 7-11. Adjusting the thread wiper7. ADJUSTMENT 7. ADJUSTMENT 7-13. Changing the intermittent strokeChanging the installation position of stepping clamp link A 7. ADJUSTMENT Stepping clamp connecting rod position adjustment Solenoid specifications 7-14. Adjusting the work clamp lift amount7-15. Adjusting the air pressure pneumatic specifications 7. ADJUSTMENTX-GT belt 7-16. Adjusting the thread trimmer cam position7-17. Belt tension adjustment 7. ADJUSTMENT7. ADJUSTMENT Y-GT belt 7-18. Adjusting the tension release amount7. ADJUSTMENT 7-19. Adjusting the backlash of the lower shaft gearSolenoid specifications 7-20. Adjusting the home position7-20-1. Work clamp lift home position 7. ADJUSTMENTEnd adjustment mode 7-20-2. X-Y feed home position7. ADJUSTMENT Repeat steps 4 and 5 to adjust the home position5208Q 5276Q 7. ADJUSTMENTRepeat steps 5 and 6 to adjust the home position End adjustment mode4700Q 7-21. Adjusting the needle up stop home position7. ADJUSTMENT 5209Q7. ADJUSTMENT 7-22. Adjusting the needle up stop positionAdjustment method End adjustment mode 7. ADJUSTMENT8. ELECTRICAL MECHANISM 8-1. Precautions while carrying out adjustments8. ELECTRICAL MECHANISM DANGERMain P.C. board 8-2. Inside the control box and operation panel structurePower supply motor P.C. board 8. ELECTRICAL MECHANISM8. ELECTRICAL MECHANISM 8-3. Description of fuses4590Q Main P.C. board 8-4. Description of connectors8-4-1. Connector positions 8. ELECTRICAL MECHANISM4592Q Power supply motor P.C. board8. ELECTRICAL MECHANISM PMD P.C. board BAS-311G, BAS-326GBAS-311G, BAS-326G 8. ELECTRICAL MECHANISM Panel P.C. board4594Q Work clamp mechanism 8-4-2. Symptoms when there are poor connections8. ELECTRICAL MECHANISM Feed mechanism4713Q 5243Q 4714Q 8. ELECTRICAL MECHANISMThread trimming mechanism Sewing operationsOther 8. ELECTRICAL MECHANISM5245Q 5246Q 5247Q 5248Q 5249Q “Problem” symbol in the “8-5-2. Remedy” lists 8-5. Troubleshooting8-5-1. Diagnosis flowchart Description of symbolsBAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5251Q BAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5252Q BAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5253Q 8. ELECTRICAL MECHANISM 8-5-2. RemedyBefore carrying out adjustment DANGER4878Q 8. ELECTRICAL MECHANISM4876Q 4877Q8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 5086Q 8. ELECTRICAL MECHANISM5087Q 4885Q 8. ELECTRICAL MECHANISM4886Q 8. ELECTRICAL MECHANISM4884Q Work clamp does not rise 8. ELECTRICAL MECHANISM4888Q 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 4891Q 8. ELECTRICAL MECHANISM4889Q 4890Q4892Q 8. ELECTRICAL MECHANISM5088Q 5089QDANGER 9. TABLE OF ERROR CODES9. TABLE OF ERROR CODES Switch-related errorsE110 9. TABLE OF ERROR CODES Upper shaft motor-related errorsFeed mechanism-related errors Work clamp-related errorsE402 9. TABLE OF ERROR CODESCommunication and memory-related errors E401E500 9. TABLE OF ERROR CODES Data editing-related errorsDevice-related errors P.C. board-related errorsCause 10. TROUBLESHOOTING10. TROUBLESHOOTING ProblemRemedy 10. TROUBLESHOOTINGProblem Causeswitch 10. TROUBLESHOOTINGProblem power is turned on and11. 7-SEGMENT DISPLAY 11. 7-SEGMENT DISPLAYBAS-311G, BAS-326G 2005.07. B SERVICE MANUALPrinted in Japan I5060885B