Benutzeranleitung / Produktwartung BAS-311G des Produzenten Brother
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BAS-31 1G BAS-326G Please read this manual before making any adjustments. DIRECT DRIVE PROGRAMMABLE ELECTRONIC PATTERN SEWER SER VICE MANUAL.
BAS-31 1G, BAS-326G i This service manual is intend ed for BAS-31 1G , BAS-326G; be sure to read the BAS-31 1G , BAS-326G instruction manual before this manual. Carefully read the “SAFETY INST RUCTIONS” below and the whole of this manual to unders t and this product before you start maintenance.
BAS-31 1G, BAS-326G ii [2] Notes on safety DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of t he control box. Touching areas where high voltages are pres ent can result in severe injury.
BAS-31 1G, BAS-326G iii CAUTION Sewing This sewing machine should only be used by operators who have received the necessary training in safe use beforehand. The sewing machine should not be used for any applications other than sewing. Be sure to wear protective goggles when using the machine.
BAS-31 1G, BAS-326G iv [3] Warning labels The following warning labels appear on the sewing machine. Please follow the instructions on the label s at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer.
BAS-31 1G, BAS-326G CONTENTS 1. SPECIFICATIONS ............................. 1 2. FUNCTION SETTINGS ...................... 2 2-1. List of special functions when power is turned on ................................................... 2 2-2. List of advanced functions .
BAS-31 1G, 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 .
1. SPECIFICA TIONS 1 BAS-31 1G, BAS-326G 1 . SPECIFICA TIONS Sewing machine Lock stitch, pattern tacking sewing machine (with large shuttle hook) S titch formation Single needle lock stitch Max. sewing speed 2,700 rpm Sewing area (XxY) BAS-31 1G: Max.
2. FUNCTION SETTINGS 2 BAS-31 1G, BAS-326G 2. FUNCTION SETTINGS 2-1. List of special functions when power is turned on 1 Memory switch setting mode (S tandard) Refer to the Instruction Manual. 6 Output checking function Refer to “2-9. Output checking method”.
2. FUNCTION SETTINGS 3 BAS-31 1G, BAS-326G 2-2. List of advanced functions While holding down the TEST key , press the corresponding combination key . 1 Memory switch setting mode (S tandard) Refer to the Instruction Manual. 5 User program setting mode Refer to the Instruction Manual.
2. FUNCTION SETTINGS 4 BAS-31 1G, BAS-326G 2-3. Memory switch setting method (Advanced) 1 Menu indicator switches off TEST indicator illuminates While pressing the TEST key and the SELECT key , turn on the power switch. * Keep pressing the TEST key and the SELECT key until the model name is display ed and the buzzer beeps once.
2. FUNCTION SETTINGS 5 BAS-31 1G, BAS-326G 2-4. List of memory switch settings No. Setting range Setting items Initial value Work clamp lif t timing after sewing is completed OFF Lift s at the final stitch position. 001 ON Lift s after moving to the home position.
2. FUNCTION SETTINGS 6 BAS-31 1G, BAS-326G Work clamp settings No. Setting range Setting items Initial value Work clamp operating mode (*2) 1 (S tandard single pedal) Work clamp rises automatically . 2 (Single pedal with no automatic work clamp lifter) Work clamp rises in accordance with foot switch depression amount.
2. FUNCTION SETTINGS 7 BAS-31 1G, BAS-326G No. Setting range Setting items Initial value Work clamp operation before home position detection OFF Work clamp cannot be raised or lowered before home posi.
2. FUNCTION SETTINGS 8 BAS-31 1G, BAS-326G Sewing machine motor settings No. Setting range Setting items Initial value Highest needle position stop OFF Disabled 150 ON When the upper shaft stops, the motor opera tes in reverse to return the needle bar close to its highest position.
2. FUNCTION SETTINGS 9 BAS-31 1G, BAS-326G Feed settings No. Setting range Setting items Initial value Mechanism home position return when sewing is finished OFF When sewing is finished, the feed plate returns to the start position. 250 ON When sewing is finished, the feed plate moves via the machine home position to the start position.
2. FUNCTION SETTINGS 10 BAS-31 1G, BAS-326G Operation panel settings No. Setting range Setting items Initial value Operation panel changing limit ation 0 No limits on changing setting values using the operation p anel.
2. FUNCTION SETTINGS 11 BAS-31 1G, BAS-326G Data editing settings No. Setting range Setting items Initial value Sewing area limit in X direction [Units mm] 0 − 130 BAS-31 1G setting value 130 460 0 .
2. FUNCTION SETTINGS 12 BAS-31 1G, BAS-326G No. Setting range Setting items Initial value Thread breakage detector OFF Disabled 554 ON Fiber-type thread breakage detector used OFF Thread breakage dete.
2. FUNCTION SETTINGS 13 BAS-31 1G, BAS-326G Error processing settings No. Setting range Setting items Initial value Error release method when operation has stopped 0 Press the RESET key . 1 Press the RESET key or the ST OP switch. 650 2 Press the RESET key or input a signal from the external switch (EXIN3).
2. FUNCTION SETTINGS 14 BAS-31 1G, BAS-326G Unique machine settings No. Setting range Setting items Initial value Automatic start for extended option output No.
2. FUNCTION SETTINGS 15 BAS-31 1G, BAS-326G <Pneumatic specifications, 2 pedal standard operations> Operating mode Memory switch setting Work clamp operation After home position detection After .
2. FUNCTION SETTINGS 16 BAS-31 1G, BAS-326G 2-7. Error history checking method The past error history can be checked by the following procedure. TEST indicator illuminates, Menu indicator switches of f 1. While pressing the key (1), turn on the power switch.
2. FUNCTION SETTINGS 17 BAS-31 1G, BAS-326G 2-8. Input checking method Use this to check for any malfun ctions of the operation panel ke ys, circuit boards or sensors, and for checking for broken cords and for adjusting sensor positions. Y ou can check whether the CPU is correctly reading the signals from keys and sensors.
2. FUNCTION SETTINGS 18 BAS-31 1G, BAS-326G PROGRAM No. display Menu display Check code Name Input status Check item and checking method [ 8] [ UP] [ on] / [ oFF] Needle up signal T urn the pulley by hand. [ 9] [ dn] [ on] / [ oFF] Needle drop signal T urn the pulley by hand.
2. FUNCTION SETTINGS 19 BAS-31 1G, BAS-326G PROGRAM No. display Menu display Check code Name Input status Check item and checking method [ 28] [Por] [ on] / [ oFF] Work clamp home position sensor [ 29.
2. FUNCTION SETTINGS 20 BAS-31 1G, BAS-326G 2-9. Output checking method Use this to check for any malfunctions of the circuit boards, and for checking for problems with dr ive mechanisms and broken cords. Y ou can check whether the signals being output by the CPU are driving the mechanisms correctly .
2. FUNCTION SETTINGS 21 BAS-31 1G, BAS-326G PROGRAM No. display Menu display Check code Name Operating details [ 61] [ CUt] Turns on the thread trimming solenoid.
2. FUNCTION SETTINGS 22 BAS-31 1G, BAS-326G 2-10. Sof tware version checking method TEST indicator illuminates, Menu indicator switches of f 1. While pressing the key (1), turn on the power . The software version will be displayed in the menu display (2).
3. READING / WRITING DA T A 23 BAS-31 1G, BAS-326G 3. READING / WRITING DA T A 3-1. Handling dat a Program numbers (100 − 999) are read from CF cards. Program numbers (0 − 99) are older BAS-300 series, BAS-300A series and BAS-300E/F series data and can be read from floppy disks.
3. READING / WRITING DA T A 24 BAS-31 1G, BAS-326G 3-2. Notes on handling CF cards (sold sep arately) • Use a CF card with a memory capacity of 32, 64, 128 or 256 MB. • Do not disassemble or modify the CF card. • Do not bend, drop or scratch CF cards or place heavy objects on top of them.
3. READING / WRITING DA T A 25 BAS-31 1G, BAS-326G 3-4. Dat a read/write mode 1 With the power turned off, inse rt the CF card into the CF slot. NOTE: • Make sure the CF card is facing the correct way . • Always be sure to keep the cover closed except when inserting and removing the CF card.
3. READING / WRITING DA T A 26 BAS-31 1G, BAS-326G 3-5. Reading sewing dat a from CF cards 1 Select the [r 1] data read/write mode. 2 Press the R/W key . • [-SEd] will change to [ ALL]. Press the or key to select the program number (100 − 999) to be read.
3. READING / WRITING DA T A 27 BAS-31 1G, BAS-326G 3-6. Writing sewing dat a to CF cards 1 Select the [w 2] data read/write mode. 2 Press the R/W key . • [SEd-] will change to [ ALL]. Press the or key to select the program numbers (100 − 999) to be written.
3. READING / WRITING DA T A 28 BAS-31 1G, BAS-326G 3-7. Reading memory switch dat a from CF cards 1 Select the [r 3] data read/write mode. 2 Loading Press the R/W key . • The buzzer will sound and the memory switch data will be loaded from the CF card and copied into the sewing machine's internal memory.
3. READING / WRITING DA T A 29 BAS-31 1G, BAS-326G 3-9. Reading user program dat a from CF cards 1 Select the [r 5] data read/write mode. 2 Loading Press the R/W key . • The buzzer will sound and th e user program data will be loaded from the CF card and copied into the sewing machine's internal memory.
3. READING / WRITING DA T A 30 BAS-31 1G, BAS-326G 3-11. Up dating the control program 1 Select the [r 7] data read/write mode. 2 Press the R/W key . • [-SyS] will be displayed for a certain amount .
3. READING / WRITING DA T A 31 BAS-31 1G, BAS-326G 3-12. Writing error log dat a to CF card 1 Select the [w 8] data read/write mode. 2 Writing Press the R/W key . • The buzzer will sound and the error log data will be copied from the internal memory onto the CF card.
3. READING / WRITING DA T A 32 BAS-31 1G, BAS-326G 4 Loading Press the R/W key . • The buzzer will sound and the se lected sewing data will be loaded from the floppy disk and copied in to the sewing machine's internal memory. • The program numbers that have be en read will appear in the menu display.
3. READING / WRITING DA T A 33 BAS-31 1G, BAS-326G 4 Writing Press the R/W key . • The buzzer will sound and the selected sewing data will be copied from the inte rnal memory onto the floppy disk. • The program numbers that have been written will appear in the menu display.
3. READING / WRITING DA T A 34 BAS-31 1G, BAS-326G 3-16. Writing extended option output dat a to CF cards 1 Select the [w 12] data read/write mode. 2 Writing Press the R/W key . • The buzzer will sound and the extended option output data will be copied from th e internal memory onto the CF card.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 35 4. MECHANICAL DESCRIPTIONS 4-1. Needle bar and thread take-up mechanisms 4-2. Lower shaft and shuttle race mechanisms 1. Motor assy 2. Upper shaft 3. Crank rod assy 4. Rock gear 5. Lower gear 6. Lower shaft 7.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 36 4-3. Work clamp lifter mechanism (Solenoid specifications) 1. Work clamp pulse moto r 2. Work clamp driving gear 3. Work clamp cam gear 4. Work clamp cam 5. Work clamp driving lever 6. Work clamp lifter link 7.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 37 4-4. Work clamp lifter mechanism (Pneumatic specifications) 4-5. Intermittent presser foot lifter mechanism 1. Air cylinde r 2. Work clamp lifter lever 3. Work clamp lifter lever 4. Work clamp 1. Work clamp pulse moto r 2.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 38 4-6. Intermittent presser foot stroke mechanism 1. Motor assy 2. Upper shaft 3. Stepping clamp cam 4. Stepping clamp connecting rod 5. Stepping clamp arm R 6. Stepping clamp arm F 7. Stepping clamp link A 8.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 39 4-7. Feed mechanism Sewing patterns are created through combinations of X and Y movements. 1. X-feed motor assy 2. Gear 3. X-feed gear 4. Y-ball spline 5. X-GT belt 6. Feed bracket X 1. Y-feed motor L assy 2.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 40 4-8. Thread trimmer mechanism 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.
4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G 41 4-9. Tension release mechanism 4-10. Thread wiper mechanism 1. Tension release solenoid 2. Bolt 3. Tension release bar 4. Tension release pin 5049Q 1. Thread wiper solenoid assy 2. Thread wiper rod 3. Thread wiper crank assy 4.
5. DISASSEMBL Y BAS-311G, BAS-326G 42 5. DISASSEMBL Y CAUTION Disassembly should only be carried out by a qualified technician. Turn off the power switch before carrying out disassembly. If the foot switch is depressed by mistake, the sewing machin e might start operating and injury could result.
5. DISASSEMBL Y BAS-311G, BAS-326G 43 5-2. Thread wiper mechanism 1. Thread wiper solenoid harness (Pull out) 2. STOP switch harness (Pull out) 3. Bolt 4. Plain washer 5. Removed washer (Assemble) 6. Removed bolt (Assemble) 7. Bolts with washer [2 pcs] 8.
5. DISASSEMBL Y BAS-311G, BAS-326G 44 5-3. Work clamp arm mechanism 1. Set screw 2. Needle 3. Needle bar thread guide 4. Bolts [4 pcs] 5. Work clamp assy 6.
5. DISASSEMBL Y BAS-311G, BAS-326G 45 5-4. Intermittent presser foot lifter mechanism (1) 1. Adjusting screw nut (Loosen) 2. Presser adjusting screw 3. Presser bar spring guide 4. Presser bar spring 5. Presser bar spring collar 6. Screw 7. Shoulder screw 8.
5. DISASSEMBL Y BAS-311G, BAS-326G 46 5-5. Needle bar mechanism 1. Rubber cap 2. Screw 3. Needle bar 4. Needle bar clamp (Pull out) 5. Slide block 6. Rubber caps [2 pcs] 7. Set screws [2 pcs] (Loosen) 8. Thread take-up support shaft assy 9. Thread take-up support 10.
5. DISASSEMBL Y BAS-311G, BAS-326G 47 5-6. Upper shaft mechanism 1. Screw (Loosen) 2. Set screw (Loosen) 3. Thread take-up crank 4. Screws [3 pcs] (Loosen) 5. Crank cover 6. Bolts [2 pcs] 7. Crank rod [Upper part] 8. Needle bearing 9. Crank rod [Lower part] (Lower downward) 10.
5. DISASSEMBL Y BAS-311G, BAS-326G 48 5-7. Lower shaft mechanism 11. Set screws [2 pcs] (Loosen) 12. Set screw (Loosen) 13. Set screw collar, R 14. Set screws [2 pcs] (Loosen) 15. Set screw collar, B 16. Rock gear shaft [Pull out from the rear of the machine] 17.
5. DISASSEMBL Y BAS-311G, BAS-326G 49 5-8. Feed covers 1. Bolts with washer [10 pcs] 2. Auxiliary plate 3. Screws [4 pcs] 4. Bellow assy 5. Screws [2 pcs] 6. Cover connecting plate 7. Screws [16 pcs] 8. Cover rails [2 pcs] 9. Inside covers [2 pcs] 10.
5. DISASSEMBL Y BAS-311G, BAS-326G 50 5-9. Feed mechanism 1. Bolts with washer [2 pcs] (Loosen) 2. Screws [5 pcs], flat screws [3 pcs] 3. Oil cover 4. Screws with washer [4 pcs] 5. Y belt cover 6. Bolts with washer [3 pcs] 7. Y-feed motor L assy 8. Set screws [2 pcs] (Loosen) 9.
5. DISASSEMBL Y BAS-311G, BAS-326G 51 26. Bolts with washer [3 pcs] 27. X-feed motor assy 28. Set screws [2 pcs] (Loosen) 29. X-feed gear 30. Rubber cap 31. Y-ball spline 32. Retaining ring C 33. Plain washer 34. Ball bearing 35. Ball bearings [2 pcs] 36.
5. DISASSEMBL Y BAS-311G, BAS-326G 52 44. Bolts [10 pcs] 45. Flat screws [8 pcs] 46. Feed bracket X 47. Bolts [16 pcs] 48. X-LM guide [2 pcs] 49. Bolts [2 pcs] 50. X-belt holder 51. X-belt holder plate 52. Bolts [2 pcs] 53. Plain washers [2 pcs] 54. Set screws [2 pcs] (Loosen) 55.
5. DISASSEMBL Y BAS-311G, BAS-326G 53 5-10. Work clamp lifter mechanism (Solenoid specifications) 1. Shoulder screw 2. Work clamp spring 3. Rubber cap 4. Link shoulder screws [2 pcs] 5. Work clamp lifter link (Pull backward) 6. Bolts [4 pcs] 7. Work clamp pulse motor (Disconnect the harness) 8.
5. DISASSEMBL Y BAS-311G, BAS-326G 54 5-11. Work clamp lifter mechanism (Pneumatic specifications) 26. Set screws [2 pcs] (Loosen) 27. Retaining ring E 28. Work clamp lever shaft B 29. Plain washer 30. Work clamp lifter lever 31. Slide block 32. Work clamp lifter plate assy 33.
5. DISASSEMBL Y BAS-311G, BAS-326G 55 5-12. Tension release mechanism 5-13. Intermittent presser foot lifter mechanism (2) 1. Set screw (Loosen) 2. Tension bracket assy (Pull out) 3. Tension release pin 4. Shoulder screws [2 pcs] 5. O rings [2 pcs] 6.
5. DISASSEMBL Y BAS-311G, BAS-326G 56 5-14. Thread trimmer mechanism 1. Set screws [2 pcs] (Loosen) 2. Thread trimmer cam 3. Screws [3 pcs] 4. Fan 5. Bolts with washer [2 pcs] 6. Set screw 7. Solenoid lever 8. Washer 9. Solenoid cushion 10. Bolts [2 pcs] 11.
5. DISASSEMBL Y BAS-311G, BAS-326G 57 5-15. Shuttle hook mechanism 33. Movable knife shoulder screw 34. Thrust washer 35. Movable knife collar 36. Movable knife assy 37. Movable knife spacer 38. Screws [2 pcs] 39. Plain washers [2 pcs] 40. Fixed knife 41.
6. ASSEMBL Y BAS-311G, BAS-326G 58 6. ASSEMBL Y Apply grease to the required places when reassembling the parts and once every two years. 6-1. Thread trimmer mechanism (1) Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.
6. ASSEMBL Y BAS-311G, BAS-326G 59 16. Driving leve r 17. Thread trimmer collar 18. Collar shaft 19. Retaining ring, E 20. Set screw 21. Thread trimmer rod V 22. Shoulder screw B 23. Nut 24. Guide shaft 25. Spring 26. Cushion 27. Set screw 28. Thread trimmer solenoid 29.
6. ASSEMBL Y BAS-311G, BAS-326G 60 6-2. Intermittent presser foot lifter mechanism (1) 6-3. Tension release mechanism 1. Tension release ba r 2. Retaining ring, E 3. Plain washer 4. Spring 5. Tension release solenoid 6. Solenoid setting plate 7. Solenoid cushion 8.
6. ASSEMBL Y BAS-311G, BAS-326G 61 6-4. Work clamp lifter mechanism (Solenoid specifications) Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows. 1. Ball bearings [2 pcs] 2. Work clamp cam 3.
6. ASSEMBL Y BAS-311G, BAS-326G 62 18. Slide bush 19. Bolts [4 pcs] 20. Work clamp lifter plate assy 21. Slide block 22. Work clamp lifter lever 23. Work clamp lever shaft B 24. Plain washer 25. Retaining ring E 26. Set screws [2 pcs] 27. Link shoulder screw 28.
6. ASSEMBL Y BAS-311G, BAS-326G 63 1) With the screw stop of the work clamp pulse motor facing downward and the index mark on the work clamp driving gea r facing to the right, adjust so that the clearance between the work clamp pulse motor and the work clamp driving gear is 6.
6. ASSEMBL Y BAS-311G, BAS-326G 64 6-5. Work clamp lifter mechanism (Pneumatic specifications) Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows. 1. Ball bearings [2 pcs] 2. Work clamp cam gear 3.
6. ASSEMBL Y BAS-311G, BAS-326G 65 1) With the screw stop of the work clamp pulse motor facing downward and the index mark on the work clamp driving gea r facing to the right, adjust so that the clearance between the work clamp pulse motor and the work clamp driving gear is 6.
6. ASSEMBL Y BAS-311G, BAS-326G 66 6-6. Feed mechanism Apply grease (AFC manufactured by THK or equivalent) to the areas indicated by the white arrows. 1. X-pulley bracket 2. X-GT belt 3. X-right pulley assy 4. Ball bearings [2 pcs] 5. Plain washer 6.
6. ASSEMBL Y BAS-311G, BAS-326G 67 26. Feed bracket X 27. Bolts M3X6 [8 pcs] 28. Bolts M4X8 [2 pcs] 29. Flat screws [8 pcs] 30. X-belt holder 31. X-belt holder plate 32. Bolts [2 pcs] 5176Q 5177Q Push the X-LM guide against the positioning pins of the feed bracket and then tighten the bolts.
6. ASSEMBL Y BAS-311G, BAS-326G 68 33. Y-pulley bracket 34. Ball bearings [2 pcs] 35. Y-pulley assy 36. Y-GT belt 37. Y-pulley fulcrum shaft 38. Set screws [2 pcs] 39. Y-belt support plate 40. Y-belt presser plate 5178Q 49. Washers [4 pcs] 50. Bolts [4 pcs] 51.
6. ASSEMBL Y BAS-311G, BAS-326G 69 53. X-feed motor assy 54. Bolts with washer [3 pcs] (Temporarily tighten) 55. Y-feed motor L assy 56. Bolts with washer [3 pcs] (Temporarily tighten) 57. Y belt cover 58. Screws with washer [4 pcs] 59. Oil cover 60. Screws [5 pcs] 61.
6. ASSEMBL Y BAS-311G, BAS-326G 70 <X-GT belt tension adjustment> 1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direction and at the left edge of the sewing area in the X direction. 2. Loosen the two bolts (3) of the X-pulley bracket (2), and then provisionally tighten them at 19.
6. ASSEMBL Y BAS-311G, BAS-326G 71 <Y-GT belt tension adjustment> 1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direction and at the left edge of the sewing area in the X direction. 2. Loosen the two bolts (3) of the Y-pulley bracket (2), and then provisionally tighten them at 19.
6. ASSEMBL Y BAS-311G, BAS-326G 72 <Inside X-LM guide installation> 1. With tension applied to the X-GT belt and the X-feed motor assembly installed, use a push-pull tension gauge to push the X feed bracket (1) from one edge to the other in the X direction.
6. ASSEMBL Y BAS-311G, BAS-326G 73 6-7. Feed covers 1. Fixed cover R 2. Fixed cover L 3. Cover rail 4. Screws M4X10 [6 pcs] 5. Screws M4X4 [2 pcs] 6. Inside cover R assy (Place into cover rail.) 7. Inside cover L assy (Place into cover rail.) 8. Outside cover assemblies [2 pcs] (Place into cover rail.
6. ASSEMBL Y BAS-311G, BAS-326G 74 A fter installing, carry out the adjustments in "7-20-2. X-Y feed home position ". 16. Auxiliary plate brackets [6 pcs] 17. Bolts with washer [6 pcs] 18. Auxiliary plate 19. Support plate guides [2 pcs] 20.
6. ASSEMBL Y BAS-311G, BAS-326G 75 6-8. Upper shaft mechanism 1. Upper shaft 2. Pulley gear R 3. Bobbin winder driving wheel 4. Stepping clamp cam assy 5. Thread take-up crank 6. Screw 7. Set screw 8. Set screws [2 pcs] 9. Set screws [2 pcs] 10. Rubber cap 11.
6. ASSEMBL Y BAS-311G, BAS-326G 76 1 ） Align the index mark D on the thread trimmer cam and the index mark E on the joint assembly, and then provisionally tighten the se t screw at the index mar k side. 2 ） After tightening the set sc rew at the screw stop side, fully tighten the set screw at the index mark side.
6. ASSEMBL Y BAS-311G, BAS-326G 77 6-9. Needle bar mechanism Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows. 1. Slide block guide 2. Bolts [2 pcs] (Temporarily tighten) 3. Washer 4. Thread take-up lever assy 5.
6. ASSEMBL Y BAS-311G, BAS-326G 78 18. Needle bar clamp 19. Needle bar ( I ns er t f ro m above) 20. Screw 21. Rubber cap A lign the needle bar so that refe rence line A (the second lowest reference l.
6. ASSEMBL Y BAS-311G, BAS-326G 79 6-10. Intermittent presser foot lifter mechanism (2) 1. Stepping clamp arm F 2. Stepping clamp arm R 3. Set screws [2 pcs] 4. Bolt 5. Presser bar clamp 6. Presser bar 7. Bolt (Temporarily tighten) 8. Stepping clamp lifter link 9.
6. ASSEMBL Y BAS-311G, BAS-326G 80 After installing the needle plate while referring to “6-13. Thread trimmer mechanism (2)”, carry out the following adjustments. 1. Turn the work clamp cam gear (1) to move the stepping foot driving lever (2) to the solid line position shown in the illustration.
6. ASSEMBL Y BAS-311G, BAS-326G 81 6-11. Lower shaft mechanism 5. Rock gear shaft (Insert from the rear of the machine head) 6. Rock gear 7. Set screw collar, B 8.
6. ASSEMBL Y BAS-311G, BAS-326G 82 12. Lower shaft assy (Insert from the rear of the machine head) 13. Retaining ring E 14. Driver 15. Bolt (Temporarily tighten) 16. Adjusting stud 17. Set screw 18. Crank rod [Lower part] (Insert into upper shaft crank) 19.
6. ASSEMBL Y BAS-311G, BAS-326G 83 6-12. Shuttle hook mechanism 6-13. Thread trimmer mechanism (2) Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows. A fter installing the shuttle hook, ca rry out the adjustments in “7-4.
6. ASSEMBL Y BAS-311G, BAS-326G 84 6-14. Work clamp arm mechanism 1. Feed plate 2. Bolts with washer [2pcs] 3. Work clamp assy 4. Plain washers [4 pcs] 5. Spring washers [4 pcs] 6. Bolts [4 pcs] A fter installing, carry out test feeding and check that the needle hole is in side the work clamp and the feed plate frame.
6. ASSEMBL Y BAS-311G, BAS-326G 85 6-14-1. Adjustments after work clamp arm installation <Retainer adjustment> 1. Screw in the M4 tap (1) on the side of the work clamp arm to apply pressure. 2. Adjust so that the sliding load of the retainers (2) is 40 – 80 N.
6. ASSEMBL Y BAS-311G, BAS-326G 86 6-15. Thread wiper mechanism 1. Thread wiper unit 2. Bolts with washer [2 pcs] 3. Bolt (Remove) 4. Plain washer (Remove) 5. Removed plain washer 6. Removed bolt 7. STOP switch harness 8. Thread wiper solenoid harness 5153Q A djust the thread wipe r after installing.
6. ASSEMBL Y BAS-311G, BAS-326G 87 6-16. Covers 1. Shuttle race cove r assy 2. Screws [2 pcs] 3. Face plate assy 4. Screws [3 pcs] 5. Eye guard assy 6. Plain washers [2 pcs] 7. Screws [2 pcs] 8. Motor cover L 9. Screws [4 pcs] 10. Motor cover R 11. Screws [4 pcs] 12.
7. ADJUSTMENT BAS-31 1G, BAS-326G 88 7 . ADJUSTMENT CAUTION Maintenance and inspection of the sewing machine should only be carried out by a qualified technician. Ask your Brother dealer or a qualified electrician to carry out any maintenanc e and inspection of the electrical system.
7. ADJUSTMENT BAS-31 1G, BAS-326G 89 7-2. S t andard thread tension S pecifications Heavy-weight materials (-01) Medium-weight materials (-02) Upper thread #20 or similar #50 or similar Lower thread #20 or similar #50 or similar Upper thread tension (N) 1.
7. ADJUSTMENT BAS-31 1G, BAS-326G 90 7 - 2 - 2 . Thread take-up spring <Thread take-up spring height> Loosen the set screw (1) and turn the adjuster to adjust. <Thread take-up spring tension> T urn the tension stud (2) with a screwdriver to adjust the tension.
7. ADJUSTMENT BAS-31 1G, BAS-326G 91 7-3. Adjusting the needle bar height T urn the machine pulley to move the needle bar to the lowest position . Then remove the rubber pl ug (2), loosen the screw (3.
7. ADJUSTMENT BAS-31 1G, BAS-326G 92 7-6. Adjusting the needle clearance T urn the machine pulley to align the tip of the rotary hook with the center of the needle, and then loos en the set screw (1) and turn the eccentric shaft (2) to adjust so that the clearance between the needle and the rot ary hook is 0.
7. ADJUSTMENT BAS-31 1G, BAS-326G 93 7-9. Adjusting the position of the movable knife 1. Open the top cover and tilt back the machine head. 2. Turn the pulley (1) by hand to lower the needle bar to its lowest position, and push the thread trimmer solenoid (2) as far as it will go.
7. ADJUSTMENT BAS-31 1G, BAS-326G 94 7. Turn the pulley (1) by hand to move the needle bar to its lowest position. 8. Loosen the nut (10), tighten the set screw (11) until the collar (3) is touching th e inside of the groove in the thread trim mer cam (4), and then turn it back in the counterclockwise direction by approximately 1/4 of a turn.
7. ADJUSTMENT BAS-31 1G, BAS-326G 95 7-10. Replacing the movable and fixed knives 1. Loosen the two bolts (1) and then remove the feed plate (2). 2. Open the shuttle race cover, remove the two screws (3) and the two flat screws (4), and then remove the needle plate (5).
7. ADJUSTMENT BAS-31 1G, BAS-326G 96 7 - 1 0 - 1 . Installing the feed plate 1 MENU indicator switches off THREAD/CLAMP indicator illuminates While pressing the THREAD/CLA MP key , turn on the power switch. * Keep pressing the THREAD/C LAMP key until the model name is displayed and the buzzer beeps once.
7. ADJUSTMENT BAS-31 1G, BAS-326G 97 7-11. Adjusting the thread wiper 1. Loosen the two screws (3) and shift the en tire solenoid setting plate (4) up or down to adjust so that the thread wiper (2) is 15 mm in front of the needle center when the plunger (1) of the thread wiper solenoid is driven to the full stroke.
7. ADJUSTMENT BAS-31 1G, BAS-326G 98 7-13. Changing the intermittent stroke The intermittent stroke ca n be adjusted to within 2 − 10 mm by adjusting the position of the stepping clamp connecting rod and changing the installation position of stepping clamp link A.
7. ADJUSTMENT BAS-31 1G, BAS-326G 99 <Stepping clamp connecting rod position adjustment> 1. Loosen the screw (1), and then open the cover (2). 2. Loosen the nut (3), and then adjust the position of the stepping clamp connecting rod (4). • When the stepping clamp connecting rod (4) is raised, the intermittent stroke will increase.
7. ADJUSTMENT BAS-31 1G, BAS-326G 100 7-14. Adjusting the work clamp lif t amount <Solenoid specifications> The operation panel settings can be used to adjust t he height to within 15 − 25 mm. (Refer to "5-7. Setting the work clamp lif t amount.
7. ADJUSTMENT BAS-31 1G, BAS-326G 101 7-16. Adjusting the thread trimmer cam position 1. Remove the top cover . 2. Loosen the two set screw s (1), and then adjust the position of the thread tr immer cam (3) so that the distance between the edge of the collar shaft (2) and the edge of the thread trimmer cam (3) is 0.
7. ADJUSTMENT BAS-31 1G, BAS-326G 102 <Y -GT belt> 1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direct ion and at the left edge of the sewing area in the X direction. 2. Loosen the two bolts (3) of the Y -pulley bracket (2), and then provisionally tighten them at 19.
7. ADJUSTMENT BAS-31 1G, BAS-326G 103 7-19. Adjusting the backlash of the lower shaf t gear 1. Gently tilt back the machine head. 2. Remove the five screws (1 ) and three flat screws (2), and then remove the oil cover (3). 3. Remove the four screws (4) and Y -belt cover (5).
7. ADJUSTMENT BAS-31 1G, BAS-326G 104 7-20. Adjusting the home position 7 - 2 0 - 1 . Work clamp lif t home position 1 Turn the pulley to set the needle to the needle up stop position. 2 TEST indicator and THREAD/CLAMP indicator light While pressing the keys simultaneously, turn on the power switch.
7. ADJUSTMENT BAS-31 1G, BAS-326G 105 5 Press the RESET key. • The work clamp will move to the home position. Check the home position. 7 Repeat steps 4 and 5 to adjust the home position. 8 End adjustment mode. TEST indicator switches of f Press the TEST key.
7. ADJUSTMENT BAS-31 1G, BAS-326G 106 5 Use 2 mm diameter pins (shaped like a needle) to align the holes in the X feed bracket (1) and the needle plate (2) with the two holes in the home posit ion reference plate (3), press the or key to change the offset value (-999 – 999) in order to lower the needle to the home position.
7. ADJUSTMENT BAS-31 1G, BAS-326G 107 7-21. Adjusting the needle up stop home position 1. Remove the needle and the needle bar thread guide. 2. T urn the pulley to move the needle bar (1) to the lowest position. 3. Remove the rubber cap (2 ) from the face plate, and then loosen the screw (3) of the needle bar clamp.
7. ADJUSTMENT BAS-31 1G, BAS-326G 108 7-22. Adjusting the needle up stop position Use the operation panel to adjust the needle up stop position so that the needle bar (1) is lowered 6.2 – 6.7 mm from it s highest position (near the highest stop position for the thread take-up).
7. ADJUSTMENT BAS-31 1G, BAS-326G 109 3 Press the or key to set the offset value (-9 - 10). • When you press the key , the needle bar will drop, and when you press the key , it will rise. NOTE: After changing the offset value, check that the thread trimming operation is normal and that error [E110] is not generated.
8. ELECTRICAL MECHANISM 11 0 BAS-31 1G, BAS-326G 8. ELECTRICAL MECHANISM DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
8. ELECTRICAL MECHANISM 111 BAS-31 1G, BAS-326G 8-2. Inside the control box and operation p anel structure Main P.C. board Secured to the side. This is the P .C. board that controls sewing machine operation. PMD P .C. board Secured to the base plate. This P .
8. ELECTRICAL MECHANISM 11 2 BAS-31 1G, BAS-326G 8-3. Description of fuses When replacing the fuses, be sure to use the fuses specified below . If the components on the P.C. boards are damaged, the fuses may blow again soon even after they have been replaced.
8. ELECTRICAL MECHANISM 11 3 BAS-31 1G, BAS-326G 8-4. Description of connectors A large number of problems are often caused by connectors that are not inserted correctly or which are contacting poorly .
8. ELECTRICAL MECHANISM 11 4 BAS-31 1G, BAS-326G PMD P.C. board Power supply motor P.C. board 4592Q 4593Q.
8. ELECTRICAL MECHANISM 11 5 BAS-31 1G, BAS-326G Panel P.C. board 4594Q.
8. ELECTRICAL MECHANISM 11 6 BAS-31 1G, BAS-326G 8-4-2. Symptoms when there are poor connections This divides the functions of the connectors into five sections, but some connectors have more than one function, so be sure to refer to the trouble symptoms in other sections too.
8. ELECTRICAL MECHANISM 11 7 BAS-31 1G, BAS-326G Thread trimming mechanism Trouble symptom Connector No. and position • Thread trimming does not operate. (No error displayed) • Digital tension does not operate. (No error displayed) [Digital tension specifications] • Analog tension does not operate.
8. ELECTRICAL MECHANISM 11 8 BAS-31 1G, BAS-326G Other Trouble symptom Connector No. and position • DC fan motor does not operate. • [E740] is displayed. • Operation panel display is incorrect. • Power indicator does not illuminate. • Operation panel keys do not work.
8. ELECTRICAL MECHANISM 11 9 BAS-31 1G, BAS-326G 8-5. T roubleshooting 8-5-1. Diagnosis flowchart Description of symbols Manual procedure Setting and status Switch operation Continued on previous/next page Judgment OFF Power switch OFF “Problem” symbol in the “8-5-2.
8. ELECTRICAL MECHANISM 120 BAS-31 1G, BAS-326G 5251Q.
8. ELECTRICAL MECHANISM 121 BAS-31 1G, BAS-326G 5252Q.
8. ELECTRICAL MECHANISM 122 BAS-31 1G, BAS-326G 5253Q.
8. ELECTRICAL MECHANISM 123 BAS-31 1G, BAS-326G 8-5-2. Remedy DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
8. ELECTRICAL MECHANISM 124 BAS-31 1G, BAS-326G Problem #1 The power indicator does not illuminate when the power is turned on. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1. Malfunction of voltage select harness *** For 200 V specifications a.
8. ELECTRICAL MECHANISM 125 BAS-31 1G, BAS-326G Problem #1 The power indicator does not illuminate when the power is turned on. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 3. Malfunction of power cord Disconnect connector P9 (ACIN) on the power supply motor P.
8. ELECTRICAL MECHANISM 126 BAS-31 1G, BAS-326G Problem #2 When the power is turned on, nothing is displayed in the PROGRAM No. display or the menu display. Cause Inspection/Remedy/Adjustment Replacement if a malfunction Control program does not operate.
8. ELECTRICAL MECHANISM 127 BAS-31 1G, BAS-326G Problem #4 Panel keys do not work. Cause Inspection/Remedy/Adjustment Replacement if a malfunction Malfunction of panel P.C. board Check that connector P1 (PANEL) is inserted into the main P.C. board, and that connector CN2 (MAIN) is inserted into the panel P.
8. ELECTRICAL MECHANISM 128 BAS-31 1G, BAS-326G Problem #7 When the foot switch is depressed, an error code is displayed. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1. If the X feed moves slightly and then [E200] is displayed, there is a malfunction of the encoder.
8. ELECTRICAL MECHANISM 129 BAS-31 1G, BAS-326G Problem #8 When the foot switch is depressed, an error code is displayed. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 3. If the feed mechanism does not move and [E210] is displayed, there is a malfunction of the pulse motor or cord.
8. ELECTRICAL MECHANISM 130 BAS-31 1G, BAS-326G Problem #9 When the foot switch is depressed, an error code is displayed. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 3. If the work clamp moves slightly and then [E300] is displayed, there is a malfunction of the encoder.
8. ELECTRICAL MECHANISM 131 BAS-31 1G, BAS-326G Problem #12 Work clamp does not drop. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1. Incorrect work clamp home position adjustment 1) Adjust the home posi tion while referring to “7-20.
8. ELECTRICAL MECHANISM 132 BAS-31 1G, BAS-326G Problem #17 Intermittent presser foot does not drop during sewing. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 2. If the presser foot does not operate and [E300] is displayed, there is a malfunction of the PMD P.
8. ELECTRICAL MECHANISM 133 BAS-31 1G, BAS-326G Problem #17 Intermittent presser foot does not drop during sewing. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 5. If the presser foot does not move and [E300] is displayed, there is a malfunction of the pulse motor or cord.
8. ELECTRICAL MECHANISM 134 BAS-31 1G, BAS-326G Problem #19 An error code is displayed after the sewing machine operates. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1.
8. ELECTRICAL MECHANISM 135 BAS-31 1G, BAS-326G Problem #21 Thread is not trimmed. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1. Incorrect mechanism adjustment Adjust the thread trim ming mechanism while refer to “7-17. Adjusting the thread trimming cam position”.
8. ELECTRICAL MECHANISM 136 BAS-31 1G, BAS-326G Problem #22 Thread wiper does not operate. Cause Inspection/Remedy/Adjustment Replacement if a malfunction 1. Incorrect mechanism adjustment Adjust the thread wiper wh ile referring to “7-11. Adjusting the thread wiper”.
9. T ABLE OF ERROR CODES BAS-31 1G, BAS-326G 137 9. T ABLE OF ERROR CODES DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.
9. T ABLE OF ERROR CODES BAS-31 1G, BAS-326G 138 Upper shaft motor-related errors Code Cause and remedy E1 10 Needle up stop position error . T urn the machine pulley until the point where the error display disappears. E 111 Upper shaft did not stop at the needle up stop position when the sewing machine stopped.
9. T ABLE OF ERROR CODES BAS-31 1G, BAS-326G 139 Communication and memory-related errors Code Cause and remedy E401 Connection communication error with power supply motor P . C. board detected when power was turned on. T urn off the power , and then check that connector P6 on the power supply motor P .
9. T ABLE OF ERROR CODES BAS-31 1G, BAS-326G 140 Data editing-related errors Code Cause and remedy E500 The enlargement ratio setting caused the sewing data to extend outside the sewing area. Set the enlargement ratio again. E501 Sewing data that exceeds the sewing machine's sewing area was loaded.
10. TROUBLESHOOTING BAS-31 1G, BAS-326G 141 1 0 . TROUBLESHOOTING • Please check the following points before calling for repairs or service. • If the following remedies do not fix the pr oblem, turn off the power switch and cons ult a qualified technician or the place of purchase.
10. TROUBLESHOOTING BAS-31 1G, BAS-326G 142 Problem Cause Remedy Re fer enc e Upper thread tension is too strong. Adjust the upper thread tension. P . 89 Needle is incorrectly installed. Inst all the needle correctly . Instruction manual Thread is too thick for the needle.
10. TROUBLESHOOTING BAS-31 1G, BAS-326G 143 Problem Cause Remedy Re fer enc e Movable knife is not cutting cleanly . Replace with a new one. P . 95 Fixed knife is not cutting cleanly . Sharpen the fixed knife or replace it with a new one. P . 95 Adjust the position of the shuttle race thread guide.
1 1. 7-SEGMENT DISPLA Y 144 BAS-31 1G, BAS-326G 1 1. 7-SEGMENT DISPLA Y ０ １ ２ ３ ４ ５ ６ ７ ８ ９ Ａ Ｂ Ｃ Ｄ Ｅ Ｆ Ｇ Ｈ Ｉ Ｊ Ｋ Ｌ Ｍ Ｎ Ｏ Ｐ Ｑ Ｒ Ｓ Ｔ Ｕ Ｖ .
SERVICE MANUAL 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177 Printed in Japan BAS-31 1G, BAS-326G I5060885B 2005.07. B (1) http://www .
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