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Brother BAS-311G Thread trimmer mechanism, Mechanical Descriptions, Movable knife 14. Fixed knife

Models: BAS-311G

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4. MECHANICAL DESCRIPTIONS

4-8. Thread trimmer mechanism

5048Q

1. Thread trimmer solenoid

2. Solenoid lever

3. Pushing lever

4. Driving lever

5. Thread trimmer collar

6. Thread trimmer cam

7. Thread trimmer rod V

8. Thread trimmer lever V

9. Thread trimmer lever H

10. Thread trimmer rod H

11. Movable knife lever

12. Movable knife connecting plate

13. Movable knife

14. Fixed knife

40	BAS-311G, BAS-326G

Page 47

Image 47

Brother BAS-311G Thread trimmer mechanism, Mechanical Descriptions, Thread trimmer rod 8. Thread trimmer lever, 5048Q

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. FUNCTION SETTINGS 2. FUNCTION SETTINGS2-1. List of special functions when power is turned on 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 SETTINGSUser program settings 2. FUNCTION SETTINGSOperation panel settings Device settings 2. FUNCTION SETTINGSData editing 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 operationsE − − − 2-7. Error history checking method2. FUNCTION SETTINGS 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. READING / WRITING DATA 3-2. Notes on handling CF cards sold separately3-3. Structure of a CF card folder 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 DATA3. READING / WRITING DATA 3-11. Updating the control programRestoring the control program if an error occurs during updating 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 mode5 End data read/write mode 3-15. Reading extended option output data from a CF card3. READING / WRITING DATA 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. DISASSEMBLY 5. DISASSEMBLY5-1. Covers 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. DISASSEMBLYPresser bar Pull downward from presser bar clamp 5-4. Intermittent presser foot lifter mechanism5. DISASSEMBLY 5093Q 5-5. Needle bar mechanism5. DISASSEMBLY 5092Q5094Q 5-6. Upper shaft mechanism5. DISASSEMBLY 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 pcs5108Q 5-10. Work clamp lifter mechanism Solenoid specifications5. DISASSEMBLY 5. DISASSEMBLY 5-11. Work clamp lifter mechanism Pneumatic specificationsSolenoid setting plate 5-12. Tension release mechanism5-13. Intermittent presser foot lifter mechanism 5. DISASSEMBLYThread trimmer collar 5-14. Thread trimmer mechanism5. DISASSEMBLY 5. DISASSEMBLY 5-15. Shuttle hook mechanism6. ASSEMBLY 6. ASSEMBLY6-1. Thread trimmer mechanism 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. ASSEMBLYIndex mark 6-4. Work clamp lifter mechanism Solenoid specifications6. ASSEMBLY 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 5176Q5179Q 6. ASSEMBLY5178Q 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 assyMeasurement position 6. ASSEMBLYX-GT belt tension adjustment 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. ASSEMBLYInside hole 6-9. Needle bar mechanism6. ASSEMBLY 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 mechanism5154Q 6-16. Covers6. ASSEMBLY 7. ADJUSTMENT 7. ADJUSTMENT7-1. Checking the machine head switch 7. ADJUSTMENT 7-2. Standard thread tension7-2-1. Upper and lower thread tension 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. ADJUSTMENT 7-11. Adjusting the thread wiper7-12. Presser foot installation position Changing the installation position of stepping clamp link A 7-13. Changing the intermittent stroke7. ADJUSTMENT 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 5209QAdjustment method 7-22. Adjusting the needle up stop position7. ADJUSTMENT 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 MECHANISM4590Q 8-3. Description of fuses8. ELECTRICAL MECHANISM 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-326G4594Q 8. ELECTRICAL MECHANISM Panel P.C. boardBAS-311G, BAS-326G Work clamp mechanism 8-4-2. Symptoms when there are poor connections8. ELECTRICAL MECHANISM Feed mechanism4713Q 5243Q 4714Q 8. ELECTRICAL MECHANISMThread trimming mechanism Sewing operations5245Q 5246Q 5247Q 5248Q 5249Q 8. ELECTRICAL MECHANISMOther “Problem” symbol in the “8-5-2. Remedy” lists 8-5. Troubleshooting8-5-1. Diagnosis flowchart Description of symbols5251Q 8. ELECTRICAL MECHANISMBAS-311G, BAS-326G 5252Q 8. ELECTRICAL MECHANISMBAS-311G, BAS-326G 5253Q 8. ELECTRICAL MECHANISMBAS-311G, BAS-326G 8. ELECTRICAL MECHANISM 8-5-2. RemedyBefore carrying out adjustment DANGER4878Q 8. ELECTRICAL MECHANISM4876Q 4877Q8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 5087Q 8. ELECTRICAL MECHANISM5086Q 4885Q 8. ELECTRICAL MECHANISM4884Q 8. ELECTRICAL MECHANISM4886Q 4888Q 8. ELECTRICAL MECHANISMWork clamp does not rise 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 andBAS-311G, BAS-326G 11. 7-SEGMENT DISPLAY11. 7-SEGMENT DISPLAY 2005.07. B SERVICE MANUALPrinted in Japan I5060885B