Bernina aurora 430 Service Manual
  1. Manuals
  2. Brands
  3. Bernina Manuals
  4. Industrial Equipment
  5. aurora 430
  6. Service manual

Bernina aurora 430 Service Manual

Hide thumbs Also See for aurora 430:
Table of Contents

Advertisement

Quick Links

Service Manual
aurora 430-440 QE
© Fritz Gegauf Ltd., Steckborn/Switzerland
4. Version A

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the aurora 430 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Bernina aurora 430

Summary of Contents for Bernina aurora 430

  • Page 1 Service Manual aurora 430-440 QE © Fritz Gegauf Ltd., Steckborn/Switzerland 4. Version A...
  • Page 3 When adjustments are carried out in the correct order, the sewing/embroidery computer will function without problem. It is important that only devices approved and distributed by BERNINA® are connected to the sewing/embroidery computer ports.

  • Page 4: Table Of Contents

    Content Safety Regulations Replacing: SP 4.2 (number of stitches in sewing Contents mode) - Thread pre-tensioner Technical Data SP 4.3 (number of stitches in embroidery - Vertical spool pin Service Panel mode) - Horizontal spool pin Tools Needed SP 4.4 (number of stitches in BSR mode) - Carrying handle SP 5.x (hour counter) - Magnifier holder and thread cutter...
  • Page 5 Technical Data BERNINA aurora 430 / 440QE Features - Stitch programmes 430 / 440QE Drive/power unit aurora 430 /440 QE Max. stitch length forward in mm Power max. 100W Increment in mm 0,05 Motor DC/65W/30V Max. stitch length reverse in mm Sewing speed in s.p.m.
  • Page 6 Service panel...
  • Page 7 Tools Required tools and gauges: Commercially available, not available from Bernina: TORX screw driver sizes. 6, 8, 9, 10, 12, 15, 20, 25 Spring mounting tool IC-Extraction Tool Multimeter Circlip mounting tool 398 083.030 398 112.030 Ω Ω Rectifying tool for...
  • Page 8 Note on Electrostatic Discharge (ESD) Protection of electrical and electronic components against electrostatic discharges Electrostatic charges are caused by: • a person's walking (influence) over synthetic tilled or carpeted floor • friction between and separation of two insulating materials (triboelectricity) If this static electricity discharges through electronic components, these may be partially or irreparably damaged.
  • Page 9 Block diagram The electronics of the BERNINA aurora are primarily accommodated in two main modules (PCBs) - the L-Print (power PCB) and the S-Print (Control via micro- processor). RET-Print RET-Print...
  • Page 10 PCBs, plugs and cables L- Print L- Print L- Print 8 poles 8 poles 8 poles P- Print 30 poles P- Print 30 poles P- Print 30 poles white white white Sensor Upper Thread Thread Thread L- Print L- Print RET- Print RET- Print Foot Control...
  • Page 11 P- Print P- Print 30 poles 30 poles Micro Micro S- Print S- Print RET- Print RET- Print white white Processor Processor 30 poles 30 poles Driver Driver Driver Driver Background Background Background Background CFL 2 poles CFL 2 poles CFL 2 poles CFL 2 poles Processor...
  • Page 12 General functions of the PCBs The microcomputer on the S-Print receives an analogue signal from the foot control which is converted into a digital signal and reported as a nominal value. The motor r.p.m is adjusted to the required value by comparison of the predetermined and actual values. When the foot control is released (nominal value zero) the microcomputer switches on the electrical brake.
  • Page 13 Universal L-Print (Power Print) The power PCB (L-Print) is installed in the cover at the rear of the sewing machine. The circuit components of the L-Print produce the following direct current voltages: • 5 V/DC for the logics on the S-Print •...
  • Page 14 Diagnostic instructions Powering the stepping motors In order to allow the stepping motors to Test 3.4 in the service programme. This operate correctly, it is essential that they are programme powers the stepping motors to returned to their "zero" position after each their correct current values.
  • Page 15 ning! ning! Danger ous voltage levels! Danger ous voltage levels! Mains voltage (refer to L-Print on page 11 Caution! Warning! The L-Print (power) switch and the mains The sewing/embroidery computer may cable carry dangerous voltages. only be connected to the mains supply For your own safety do not touch the L- when the covers are mounted.
  • Page 16 Start / Stop Start / Stop Service Start Service Start Aurora 430 /440 031 216.50.00 Aurora 430 /440 031 216.50.00 Aurora 430 /440 031 216.50.00 Servicing program relevant keys and display are shown on the panel above. The screen serves as a display, complemented by the symbols (a to q) on the panel.
  • Page 17 Functions of keys on panel 1-12 program 13-16 available OK, return to basic program with saving of data start/stop, confirm and start or quit particular test ESC, return to basic program without saving data -, reducing the stitch length +, increasing the stitch length -, reducing the stitch width +, increasing the stitch width -, when 25 is simultaneously pressed the value in the respective test is reduced by one unit...
  • Page 18 Service Tests (SP - Service Program) SP 0 Sensors test in basic program SP 0.1 Functional test of operating voltages & data transfer signals. The voltages and the data transfer signals on the S-Print are displayed by means of LEDs under the service cover B.
  • Page 19 Meaning and function of LEDs What to test: LED1 / 30V LED2 / 12V LED3 / 5V Desired status: Actual status: Not lit Not lit Not lit Repair note: • Check the wiring for • Check the wiring for • Check the wiring for (if status is as “Actual status”) deformation, tears or breaks.
  • Page 20 SP 0.2 Foot control functional test What to test: Foot control Desired status: Connect foot control in test basic program Actual status: Activate foot control. The foot control setting is indicated on the stitch length bar display. When the foot control is pushed down at the heel end, the stitch length bar will indicate up to 1.
  • Page 21 SP 0.4 Presser foot pressure functional test What to test: Presser foot pressure regulator Desired status: Test in basic programme. Nominal value is 47. Actual status: Rotate the presser foot pressure regulator wheel back and forth The position is displayed on the presser foot pressure display (digital bargraph b and p).
  • Page 22 SP 0.6 Feed-dog drop functional test What to test: Feed-dog drop light barrier Desired status: Test in basic programme Actual status: Move feed-dog drop button back and forth. The feed-dog drop symbol appears when the feed- dog is dropped. Repair note: •...
  • Page 23 SP 0.8 Upper thread indicator What to test: Functioning of upper thread indicator light barrier Desired status: Test in basic programme Actual status: From below insert a loop of thread around the regulator spring. Move take-up spring with thread loop up and down.
  • Page 24 22 Titel SP 0.9 Buttonhole sensor What to test: Functioning of buttonhole sensor What to adjust: Test in basic program Desired status: Insert automatic buttonhole foot 3a. Move foot slide back and forth. The needle positions 4 and 5 blink alternatively for the two signals of the buttonhole.
  • Page 25 SP 0.10 P- Print What to test: Functioning of the P-Print light barriers What to adjust: Test in basic programme Desired status: Turn the handwheel and compare the data displayed with the chart. Needle positions 7-9 appear depending on the position of the main shaft (see chart).
  • Page 26 SP 1 - 12 Program tests SP 1.x Stitch patterns What to test: SP 1.1 Functioning of zig-zag and straight stitches SP 1.2 Functioning of the honeycomb stitch SP 1.3 Functioning of the darning stitch SP 1.4 Functioning of the buttonhole stitch SP 1.5 Functioning of the keyhole buttonhole stitch What to adjust: Mount presser foot and insert needle and thread the...
  • Page 27 SP 2.x Front cover SP 2.1 Screen What to test: SP 2.1 Functioning of the screen What to adjust: Select respective test in the basic program by pressing key 2 once. Press button 18 to confirm selected test. Press ESC button to exit and return to basic program. Desired status: Each possible symbol is displayed in the matrix (symbol g) until activated by pressing key 18 (start/stop).
  • Page 28 SP 2.3 Signal tone What to test: SP 2.4 Functioning of the beep signal What to adjust: Select respective test in the basic program by pressing button 2 three times. Press key 18 to activate selected test. The signal tone can be switched off by pressing 19 / ESC key.
  • Page 29 SP 3.x Stepping motors SP 3.1 Stitch length stepping motor What to test: SP 3.1 Functioning of the stitch length stepping motor What to adjust: Select respective test in the basic program by pressing key 3 once. Press key 18 to activate selected test. Press OK or ESC button to exit and return to basic program.
  • Page 30 SP 3.2 Stitch width stepping motor What to test: SP 3.2 Functioning of the stitch width stepping motor What to adjust: Select respective test in the basic program by pressing key 3 twice. Press key 18 to start test. Press OK or ESC button to exit and return to basic program.
  • Page 31 SP 3.3 All stepping motors What to test: SP 3.3 Functioning of the two stepping motors consecutively Select respective test in the basic program by pressing key What to adjust: 3 three times. Press key 18 to confirm selected test. Press OK or ESC button to exit and return to basic program.
  • Page 32 SP 3.4 The stepping motors in basic position What to test: SP 3.4 pinning position of both stepping motors together What to adjust: Select respective test in the basic program by pressing key 4 four times. Press key 18 to activate selected test. Press OK key to exit and return to basic program.
  • Page 33 SP 3.5 Stitch position with stitch width stepping motor What to test: SP 3.5 Stitch position in area of stitch plate What to adjust: Select respective test in the basic program by pressing key 5 five times. Press key 18 (toggle) to activate the test. It is important that the needle doesn’t touch the stitch plate at the left and lright hand side.

  • Page 34: Sp 5.1 Time Power On

    SP 4.1 Total number of stitches made SP 4.2 Number of stitches in sewing mode SP 4.3 Number of stitches in embroidery mode SP 4.4 Number of BSR stitches (BSR=Bernina Stitch Regulator) What to adjust: Depending on the stitch counter required, press key 4 one to four times in the basic program.

  • Page 35: Sp 6.X Speed

    SP 6.x Speed SP 6.1 Calibration of maximum speed What to test: SP 6.1 Calibration of maximum speed What to adjust: Select respective test in the basic program by pressing key 6 once. Press key 18 to activate selected test. Hold foot control down until 'OK' or 'F' appears in the 00 09 matrix.

  • Page 36: Sp 6.2 (Testing Standard Speed)

    SP 6.2 Testing of standard speed What to test: SP 6.2 Checking of standard speed i.e 900 s.p.m. What to adjust: Select respective test in the basic program by pressing key 6 twice. Press key 18 to activate selected test. Hold foot control down the speed is displayed.

  • Page 37: Sp 7.X Information

    18 (start/stop). The version is displayed in the matrix. symbol g Repair note: • update using BAMS BERNINA Aurora Maintenance Software SP 7.2 Configuration What to test: SP 7.2 Display of installed version What to adjust: Select respective test in the basic program by pressing key 7 twice.

  • Page 38: Sp 7.3 (Serial Number)

    SP 7.3 Serial number What to test: SP 7.3 Display of serial number What to adjust: Press key 7 three times in the basic program. Press key 18 to confirm selected test. 4410 Press OK key to exit and return to basic program. 0106 Desired status: Each test type is displayed in the matrix (symbol g) until...

  • Page 39: Sp 8.X Calibration Of Balance

    SP 8.x Calibration of balance SP 8.1 Balance zero feed (rough) What to test: SP 8.1 Rough adjustment of balance What to adjust: Make sure that the basic mechanical settings are correct. (see page 60) Press key 8 once in the basic program. Press key 18 to activate selected test.

  • Page 40: Sp 8.3 (Balance Using "Leaf" Pattern)

    SP 8.2 '9' balance (Electronical fine adjustment) SP 8.3 Balance leaf pattern What to test: SP 8.2 - 8.3 Fine adjustment of balance What to adjust: Make sure that the basic mechanical settings are correct. Press button 8 twice in the basic program for the “9” pattern or three times for the leaf pattern.
  • Page 41 SP 8.4 Buttonhole What to test: SP 8.4 Calibration of buttonhole Caution: This applies only to aurora models 430 and 440QE! What to adjust: Make sure that the basic mechanical settings are correct The buttonhole filter is no and that the foot is in good working condition. longer needed for this test! Press key 8 four times in the basic program.
  • Page 42 SP 9.x Motors SP 9.1-2 Continuous running in zigzag and honeycomb stitch modes What to test: SP 9.1 Continuous running in zigzag stitch mode SP 9.2 Continuous running in honeycomb stitch mode What to adjust: Depending on the stitch program required, press key 9 once or twice in the basic program.
  • Page 43 SP 9.3 Winder motor What to test: SP 9.3 Functioning of winder motor What to adjust: Press key 9 three times in the basic Program Press key 18 to confirm selected test. Continuous running can be started or stopped with each further pressing of key 18.

  • Page 44: Sp 10.1 Bsr Sensors

    SP 10.x BSR Bernina Stitch Regulator SP 10.1 BSR sensors What to test: SP 10.1 BSR sensors What to adjust: Attach BSR foot Select respective test in the basic program by pressing key 10 once. Press key 18 to confirm selected test.
  • Page 45 SP 10.3 BSR information frame number What to test: SP 10.3 Display of BSR frame number What to adjust: Attach BSR foot Press key 10 three times in the basic program. Press key 18 to confirm selected test. 4530 Press OK key to exit and return to basic program. 1964 Desired status: Each test type is displayed in the matrix (symbol g) until...

  • Page 46: Sp 10.5 (Bsr Software Version)

    SP 10.5 BSR information - software version What to test: SP 10.5 Display of installed version What to adjust: Attach BSR foot Press key 10 five times in the basic program. Press key 18 to confirm selected test. Press OK key to exit and return to basic program. Desired status: Each test type is displayed in the matrix (symbol g) until activated by pressing key 18 (start/stop).
  • Page 47 SP 10.7 Hardware status of PCB in the BSR foot What to test: SP 10.7 Hardware status of PCB in the BSR foot What to adjust: Attach BSR presser foot Select test in basic program by pressing button 10 Seven times Press button 18 to confirm test Press OK button to exit and return to basic program Desired status:...

  • Page 48: Information

    SP 12.x Information SP 12.1-4 Various service functions What to test: The selected stitch program is displayed SP 12.1 Maintenance counter SP 12.2 Resetting maintenance counter SP 12.3 Service counter SP 12.4 Resetting service counter What to adjust: Depending on the counter required, press key 12 one to four times in the basic program.

  • Page 49: Cleaning Interval

    SP 12.1-2 Cleaning interval Displayed: 180,000 stitches = sewing stitches + (embroidery stitches/2) (a200 principle). The stitch counter (up-counter) triggers a flashing symbol on the display as a reminder to the user. The counter is reset if the user confirms the message by pressing OK twice (refer to Instruction manual page 58) The message is cleared by pressing ESC but it will reappear the next time the machine is switched on unless acknowledged by pressing OK before that.

  • Page 50: Visual, Functional, Sewing And Mechanical

    Visual, functional, sewing and mechanical checks Visual checks: • Visual check of the entire machine • Visual check of: • Spool holder • Thread guiding parts • Needle in general, and needle position • Stitch plate • Feed-dog • Bobbin case •...
  • Page 51 Note on Electrostatic Discharge (ESD) Protection of electrical and electronic components against electrostatic discharges Electrostatic charges are caused by: • a person walking over a tiled or carpeted floor (influence) • friction between and separation of two insulating materials (triboelectricity) If this static electricity discharges through electronic components, these may be partially or irreparably damaged.

  • Page 52: Removing Covers

    Removing covers Before making adjustments, the covers must be removed in the following order: Head cover: • Remove screw 5. • Remove head cover. Rear cover: • Remove screw 6. • Remove screws 7 (3 screws). • Disconnect L-Print cable. •...

  • Page 53: Cleaning

    Front cover: Remove hook cover. Remove screws 8 (5 screws). Feed-dog drop button must be in sewing position. Turn handwheel until screw 8a is accessible (hook drive crank at rear stop). Lift cover over upper thread tension adjusting disc and pull out. Disconnect connectors (9-12).

  • Page 54: Replacing

    Replacing Thread pre-tensioner Disassembly 1) Remove rear cover. 2) Remove screw (123). 3) Remove thread pre-tensioner (124) and replace. Assembly 1) Refit thread pre-tensioner (124). 2) Refit screw (123). 3) Refit cover. 4) Carry out a functional check. 5) Sewing-off. Vertical spool pin Disassembly 1) Remove rear cover.

  • Page 55: Horizontal Spool Pin

    Horizontal spool pin and rear thread-guide eyelet Disassembly 1) Remove rear cover. 2) Pinch clip (129) and pull spool pin (130) out to the back. Replace. 3) Replace thread-guide eyelet (131). Assembly 1) Position thread-guide eyelet (131). 2) Move spool pin (130) forwards in the guide until clip (129) engages.

  • Page 56: Magnifier Holder And Thread Cutter

    Magnifying-glass holder and thread cutter Disassembly 1) Remove head cover. 2) Pinch clip (136) and pull magnifying-glass holder (137) downwards and out. Replace. 3) Pinch clip (138) and pull thread cutter (139) downwards and out. Replace. Assembly 1) Move thread cutter (139) upwards in the guide until clip (138) engages.
  • Page 57 Assembly 1) Slide front cover (4) into guides until front cover clips (3) engage. 2) Insert keypads (15) - contacts must not be dirty or oily! Attention: Is the EEPROM fitted? 3) Refit side cover (20), insert S-Print (22) and RET-Print (23). 4) Refit screws (13, 16 and 17).
  • Page 58 L- Print Disassembly 1) Remove rear cover. 2) Remove screws (18). 3) Remove L-Print cover (103). 4) Check the primary (153) F2 (031999 50.00) and secondary (154) F3 (031999.50.01) fuses. Replace if necessary. 5) Disengage switch (155) and socket (156). 6) Remove screws (151).

  • Page 59: Presser Foot Lifter Sensor

    CFL sewing light Disassembly 1) Remove all covers. 2) Remove screw (159). 3) Disengage CFL (160) from both fastening clips (168). Replace. Note: The presser foot bar must be down! Assembly 1) Refit CFL (160). 2) Place cable (157) into guide (158). 3) Refit screw (159).

  • Page 60: Buttonhole Sensor

    Buttonhole sensor PCB Disassembly: 1) Remove covers. 2) Remove CFL 7 (see page 57). 3) Remove thread tension unit (see page 64). 4) Carefully lift buttonhole sensor 17 using a screwdriver at the clip of the presser foot bar guide bearing. 5) Turn sensor to front and pull out.

  • Page 61: Stitch Width Stepping Motor

    Stitch width stepping motor Disassembly: 1) Remove covers. 2) Loosen screw 26a. 3) Remove adjusting wheel safety clip (161). 4) Remove adjusting wheel (162). 5) Remove drive gear 26. 6) Remove both securing screws 27. 7) Replace stepping motor. Assembly: 1) Fit new stepping motor and fasten with the two securing screws.
  • Page 62 Stepping motor, stitch length and crankshaft Disassembly: 1) Remove covers. 2) Remove balance shaft 28 including screw 3) De-hook tension springs 30 to 34 and disconnect plug 146 (page 55). 4) Remove both motor bracing 36 securing screws 35. 5) Remove bushing support 37 including screws 37a and 38 from the gear segment 39 of the crankshaft.

  • Page 63: Foot Pressure Sensor

    Presser foot pressure sensor Disassembly 1) Remove covers. 2) Remove adjusting wheel safety clip (161). 3) Remove adjusting wheel (162). 4) Remove metal guide (164). 5) Disconnect plug (143) from P-Print (149) page 55 and unthread cable (163) from guide (page 55). 6) Remove screws (165).
  • Page 64 Base shaft Disassembly: 1) Remove covers. 2) De-hook tension springs 30 to 34. 3) Remove feed-dog drop unit 43 including securing screws 44. 4) Remove both circlips 45. 5) Loosen screw 46 and relax belt tensioner 47. Retighten screw 46. 6) Remove shaft bearing 48 including securing screws 49.
  • Page 65 Hook race ring Disassembly: 1) Remove covers. 2) Remove, stitch plate and frame. 3) Remove securing screws 52 and hook race cover 51. 4) Remove screw 53 and hook drive 53a with washer. 5) Remove the 3 screws 55 and hook race 6) Remove thread guid and thread positioning plate 56.

  • Page 66: Thread Tension Unit

    Thread tension unit Disassembly: 1) Remove covers. 2) Remove securing screws 58. 3) Replace thread tension unit 59. Assembly: 1) Fit new thread tension unit 59 and fasten with the securing screws 58. 2) Put release piece on screw and set tension release mechanism.

  • Page 67: Thread Take-Up Lever

    Thread take-up, link and needle bar Disassembly: 1) Remove covers. 2) Remove CFL (see page 57). 3) Remove thread tension unit (page 64) 4) Remove securing screw 61 and angular adjusting piece 60. 5) Remove screw 74 and zigzag stop 73. See illustration on page 64.

  • Page 68: Main Shaft And Synchronizing Disc

    Main shaft and synchronizing disc Disassembly: 1) Remove covers. 2) Remove P-Print (see page 55). 3) Remove securing screws 73 and 74 from balance piece. 4) Remove motor drive belt. 5) Remove base shaft timing belt. 6) Remove screws 79a and clamps, along with circlip 76.

  • Page 69: Tensioning Drive Belt

    Always check the needle before carrying out adjustments on the sewing/embroidery computer! It must be absolutely straight (130/705 H TCN). When servicing, always use original BERNINA parts and accessories, either ones supplied with the machine or purchased afterwards. These are the following: mains cable, foot control, buttonhole foot, bobbin case with bobbin, other accessories.

  • Page 70: Bobbin Winder Device

    Bobbin winder device Standard: The thread should be evenly wound with pre- tension, and the bobbin should be correctly filled. Correcting uneven filling: Turn screw 80a in or out as appropriate. Correcting the bobbin filling when overfilled: Turn screw 80b in or out as appropriate. Position of the head frame plate Standard: Presser foot must be in the centre of the stitch...

  • Page 71: Presser Foot Fixation

    Presser foot fixation Standard: The tension pin 81 should be positioned one Rear view third to halfway along tension lever 82. The presser foot sole 83 should be positioned parallel to the markings on the stitch plate. Correction: • Loosen screw 84 on clamp 85. •...

  • Page 72: Darning Foot Height

    Darning foot height Standard: • Attach darning foot. • Drop feed-dog. • Turn handwheel until presser-foot bar reaches its lowest position. • Use gauge 87 to check distance (0.5 mm) between stitch plate and darning foot sole. Correction: • Remove adjusting wheel lock 161. •...

  • Page 73: Needle/Hook Distance

    Needle/Hook distance in direction of fabric feed Standard: Remove stitch plate cover. Insert needle (type 80 TCN). The lateral distance between needle and hook (in the scarf) should be 0.01 mm to 0.05 mm. Correction: • Loosen screw 89 on pivot pin 90. •...

  • Page 74: Position Of Synchronizing Disc

    Position of synchronizing disk Rough adjustment after disassembly. Standard: Mechanical check: rough adjustment. • Pin balance piece • Screw 77a should sit horizontally to the back. Electronic check: fine adjustment • See fine adjustment (page 23). Correction: Presetting: • Loosen screw 77a. •...
  • Page 75 Feed-dog height Standard: 0.9 mm In the feed-dog's highest position, the peaks of the feed-dog teeth must be at least 0.05 mm higher at the front than at the back 1 mm (feed-dog height 0.9-1.0 mm). Example: • front 0.95 mm, back 0.90 mm •...

  • Page 76: Thread Passage Play

    Thread passage Standard: 0.3mm The play between hook 101 and hook driver 102 must be 0.3 mm. Use feeler gauge 398 022 030 to check and adjust. Correction: If the distance is too wide or too small, adjust the short driver arm 103 with the rectifying tool 001357.70.00.

  • Page 77: Feed-Dog Synchronization (Timing)

    Feed-dog synchronization (feed-dog lift and advance timing) Standard: • Pin needle drive balance. • The base shaft and the hook drive crank must be able to be pinned in this position. Attention: Ridge on base shaft must face front! Correction: •...

  • Page 78: Position Needle/Hook Point

    Loop lift hook adjustment (hook synchronization) Standard: • Remove covers. • Remove motor screw (24). • Slightly loosen motor screw 25. • Swing motor upwards and retighten screw • Remove stitch plate. • Pin stepping motor to centre needle position. •...
  • Page 79 Needle/Hook position Standard: • Remove covers. • Remove ventilator fan. • Remove both main motor screws (25). • Remove main motor (see page 75). • Pin balance piece, zigzag stepping motor and hook drive crank (centre needle position). • The hook tip must be flush with the left edge of the needle.

  • Page 80: Basic Balance Settings

    Basic balance setting Standard (front cover must be removed): • Pin balance adjusting cam 107 (pin from handwheel side). • The drive gear must be against the stop. • The stitch length crank 108 must now be in pinning position. Correction: •...

  • Page 81: Basic Knee Lifter Settings (Fhs)

    Basic presser foot lifter setting (FHS) Standard: • The end of the knee-activated lever (FHS) should be approx. 160 mm from the needle center position (horizontally). Note! This can be set to suite the customer. Correction: • Attach lifter in opening 110. •...

  • Page 82: Basic Setting Of Upper Thread Tension

    Basic setting of upper thread tension Standard: • Use Mettler white thread (cotton Ne60/2 Nm 43.1/2) for testing. Thread machine up to and including thread take-up lever (incl. rear thread guide). • Turn adjusting wheel until the red bar mark is in line with the mark on the housing.

  • Page 83: Thread Tension Release Lever

    Adjust screw (122) to set pressure piece distance to at least 0.3 mm. Thread regulator Weight standard: 12-15 g. Use BERNINA tension spring scales no. 006 038 5000. Correction of weight: Turn screw 113 to left or right to tighten or slacken tension.
  • Page 84 Sewing-off Sewing-off is a way of checking whether the 5) Balance using '9' for testing 8) Sew-off samples for the customer adjustments made have had the desired • Is the stitch formation symmetrical? At the end of the service, a sample is effect, and that the machine is functioning •...

This manual is also suitable for:

Aurora 440 qe

Table of Contents

Save PDF