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Janome Skyline S7 Service Manual - Mechanical Adjustment

Other manuals for Skyline S7: Instruction Book

Summary of Skyline S7

  • Page 1

    Service manual skyline s7 first edition: 7 august 2015.

  • Page 2

    Table of contents replacing external parts face cover ..........................................................................................................................................................1 belt cover ..................................................................................

  • Page 3

    1 replacing external parts face cover to remove: 1. Remove the setscrews a. Remove the face cover. To attach: follow the above procedure in reverse. Setscrews a belt cover to remove: 1. Remove the cap and setscrew b. 2. Remove the setscrew c. 3. Loosen the two setscrews d. 4. Pull the rear side of t...

  • Page 4

    2 replacing external parts top cover to remove: 1. Raise the carrying handle and remove the setscrew a. 2. Open the top cover. Pull out the flange plate from the bobbin winder spindle. 3. Remove the setscrews b and c. 4. Open the face cover. Close the top cover and raise the carrying handle. Pull th...

  • Page 5

    3 replacing external parts machine base to remove: 1. Remove the setscrews a. 2. Remove the machine base. To attach: follow the above procedure in reverse. Base cover to remove: 1. Remove the setscrews b. 2. Remove the base cover. To attach: follow the above procedure in reverse. Bed cover to remove...

  • Page 6

    4 replacing external parts free arm cover to remove: 1. Remove the machine base and base cover (see page 3). Remove the presser foot. Push down the needle plate release lever to remove the needle plate. Remove the bed cover (see page 3). 2. Remove the threaded pin. 3. Loosen the setscrew and unlock ...

  • Page 7

    5 replacing external parts front cover to remove: 1. Remove the top cover, belt cover, base cover, machine base and free arm cover (see pages 1-4). 2. Loosen the setscrews a (underside of the machine). 3. Remove the setscrew b. 4. Loosen the setscrew c (behind the face cover). 5. Loosen the setscrew...

  • Page 8

    6 replacing external parts rear cover to remove: 1. Lower the presser foot. Remove the belt cover, top cover and base cover (see pages 1-3). 2. Loosen the setscrew a. 3. Loosen the setscrew b 4. Remove the four setscrews c. 5. Push the rear cover from the holes d and e with a screwdriver to remove t...

  • Page 9

    7 replacing mechanical parts needle threader hook to remove: 1. Push down the threader lever as far as it will go and hold it in place. Loosen and remove setscrew. 2. Release the threader lever slowly while holding the threader unit to disengage it from the threader shaft. 3. Disassemble the threade...

  • Page 10

    8 replacing electronic components printed circuit board a note: do not disconnect connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. To remove: 1. Remove the front cover (see page 5). 2. Disconnect the connectors from the printed circuit board a. 3. Remov...

  • Page 11

    9 replacing electronic components note: do not disconnect connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. Printed circuit board f to remove: 1. Remove the front cover (see page 5). 2. Disconnect the printed circuit board f connector from the printed ci...

  • Page 12

    10 switching power supply unit to remove: 1. Remove the belt cover, the top cover and the front cover (see pages 1, 2 and 5). 2. Disconnect the switching power supply connector from the switching power supply unit. 3. Remove the foot control connector from the printed circuit board a (see page 7). 4...

  • Page 13

    11 replacing electronic components dc motor note: do not disconnect connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. To remove: 1. Remove the belt cover, the top cover and the front cover (see pages 1, 2 and 5). 2. Disconnect the dc motor connector from...

  • Page 14

    12 replacing electronic components thread tension unit note: do not disconnect connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. To remove: 1. Remove the belt cover and the top cover (see page 1 and 2). 2. Remove the front cover (see page 5). 3. Disconne...

  • Page 15

    13 nut setscrew a adjusting screw b presser foot 0.80 – 0.90 mm surface of needle plate feed dog hexagonal socket screw i setscrew d threaded hole c adjusting screw b threaded hole c setscrew a setscrew d mechanical adjustment feed dog height when the foot pressure is set at maximum (auto+4) and the...

  • Page 16

    14 eccentric pin eccentricity pin needle hole 0.2 mm or more 0.2 mm or more a = b hexagonal socket screw "9.0" "0.0" needle drop position "4.5" mechanical adjustment needle drop position when the straight stitch is selected, the needle should be positioned in the center of the needle plate hole. Whe...

  • Page 17

    15 test pin tip of hook -0.1 to +0.05 mm left needle position right needle position clearances a and b must be even a b mechanical adjustment clearance between needle and tip of the rotary hook (method 1) the clearance between the needle and the point of hook should be -0.1 to +0.05 mm. Needle bar s...

  • Page 18

    16 setscrew c setscrew b setscrew a hook base plate mechanical adjustment clearance between needle and tip of the rotary hook (method 2) the clearance between the needle and the point of hook should be -0.1 to +0.05 mm. 1. Remove the bed cover (see page 3). 2. Loosen the setscrews a, b and c. Tighte...

  • Page 19: Mechanical Adjustment

    17 mechanical adjustment setscrews a bobbin holder hook tip of hook hook timing the amount of ascending travel of the needle bar from its lowest position to the position (needle drop position 0.0) where the tip of the rotary hook exactly meets the right side of the needle should be 3.70 to 4.00 mm. ...

  • Page 20: Mechanical Adjustment

    18 mechanical adjustment 1. Attach the needle #14. 2. Turn the power switch on. Select straight stitch. Set the needle drop position at "0.0". * do not turn the switch off. 3. Remove the presser foot, the needle plate and the bobbin holder. 4. Turn the handwheel toward you until the tip of hook meet...

  • Page 21: Mechanical Adjustment

    19 (a) (a) (b) lower shaft bushing (front) hexagonal socket screw c hook driving gear lower shaft gear lower shaft bushing (rear) hexagonal socket screw d mechanical adjustment backlash between hook drive gear and lower shaft gear the rotary play of the hook should be 0.8 mm or less when the tip of ...

  • Page 22: Mechanical Adjustment

    20 even sensor upper shaft shield plate needle #14 surface of needle plate mechanical adjustment upper shaft shield plate position when the machine is set for zigzag stitch, the needle should start to swing 7.2 to 8.2 mm above the surface of the needle plate. 7.2 – 8.2 mm setscrew a upper shaft sens...

  • Page 23: Mechanical Adjustment

    21 pulling direction: (pulling speed 110 mm/sec.) mechanical adjustment upper thread tension the standard upper thread tension should be 59 to 67 grams when the machine is set for pattern no.1 and the thread tension is set at "3.4", measured with a #50 polyester thread being pulled at approximately ...

  • Page 24: Mechanical Adjustment

    22 setscrew thread tension gear tension discs supporter thread tension release adjusting plate tension discs (closed) convex part of tension gear tension release claw tension release claw setscrew thread tension 1.2 – 1.8 mm view a 1.2 – 1.8 mm thread tension release adjusting plate tension discs su...

  • Page 25: Mechanical Adjustment

    23 mechanical adjustment needle threader hook position 1. Push down the threader lever and hold it just before the threader hook enters the needle eye. 2. If the threader hook is not aligned vertically with the needle eye, loosen the setscrew a. Adjust the stopper position so that the hook enters in...

  • Page 26: Mechanical Adjustment

    24 thread drawing lever 5.5 – 6.0 mm hexagonal socket bolt hook race view a thread drawing lever view a hook race mechanical adjustment thread drawing lever the standard height of the thread drawing lever from the surface of bobbin holder should be in the range of 5.5 – 6.0 mm. 1. Remove the presser...

  • Page 27: Mechanical Adjustment

    25 to check: 1. Set the upper feed adjusting dial at “0”. Remove the belt cover and base cover (see page 1-2). 2. Turn the power switch on and select ( ) stitch. Lower the feed dog. 3. Press the needle up/down button twice to raise the needle, and the upper feed dog position will be initialized. 4. ...

  • Page 28: Mechanical Adjustment

    26 to check: 1 set the upper feed adjusting dial at “0”. Attach the dual feed foot. 2. Turn the power switch on and select ( ) stitch. Lower the feed dog. 3. Press the needle up/down button twice to raise the needle, and the upper feed dog position will be initialized. 4. Press the presser foot lift...

  • Page 29: Mechanical Adjustment

    27 to check: 1 set the upper feed adjusting dial at “0”. Attach the dual feed foot. 2. Turn the power switch on and select ( ) stitch. Lower the feed dog. 3. Press the needle up/down button twice to raise the needle, and the upper feed dog position will be initialized. 4. Press the presser foot lift...

  • Page 30: Mechanical Adjustment

    28 setscrew ⇔ hexagonal socket screw mechanical adjustment buttonhole lever buttonhole lever guide buttonhole lever buttonhole lever guide setscrew hexagonal socket screw 1.6 mm slider stopper buttonhole foot (r) 1. Turn the power switch on while pressing the start/ stop button and the reverse stitc...

  • Page 31: Mechanical Adjustment

    29 end of thread cutter plate slit 0.4 to 1.2 mm end of moving cutter sensor plate setscrew a b moving cutter mechanical adjustment thread cutter the distance between the end of thread cutter plate slit and the end of moving cutter should be in the range of 0.4 to 1.2 mm. To check: 1. Remove the bed...

  • Page 32: Mechanical Adjustment

    30 should be parallel mechanical adjustment presser bar lifter position the clearance between the presser foot and the surface of the needle plate should be 6 mm when the presser foot is raised. The presser foot (zigzag foot a) should be parallel to the slot of the feed dog teeth when attached. Zigz...

  • Page 33: Mechanical Adjustment

    31 mechanical adjustment presser foot lifter stopper position (1) the distance between the presser foot spring release base and the presser foot lifter should be in the range of 39.4 mm to 39.8 mm when the presser foot is raised with the presser foot lifter. Preparation: 1. Turn the power switch on....

  • Page 34: Mechanical Adjustment

    32 mechanical adjustment presser foot lifter stopper position (2) supporter spring setscrew h setscrew i 6. Remove the supporter spring. Remove the setscrews h and i. Remove the front bracket. Front bracket 39.6 mm presser foot lifter stopper to adjust: 1. Turn the handwheel toward you to lower the ...

  • Page 35: Mechanical Adjustment

    33 mechanical adjustment automatic presser foot lifter initializing position to adjust: 1. Remove the top cover. 2. Turn the power switch on while pressing the start/stop button and the reverse stitch button. The lcd shows the factory setting mode. Press "foot sensor" key. 3. Turn the gear a (indica...

  • Page 36: Mechanical Adjustment

    34 mechanical adjustment presser bar height to adjust: 1. Turn the power switch on while pressing the start/ stop button and the reverse stitch button. The lcd shows the factory setting mode. Press "foot up/ down" key. 2. Attach the foot holder lightly (do not tighten the thumbscrew.). 3. Press "dow...

  • Page 37: Mechanical Adjustment

    35 mechanical adjustment embroidery foot height the distance between the embroidery foot and the surface of the needle plate should be in the range of 1.7 mm to 1.9 mm when the presser bar is lowered. To adjust: 1. Attach the embroidery foot p (not included in the standard accessories, part number 8...

  • Page 38: Mechanical Adjustment

    36 mechanical adjustment to adjust: 1. Turn the power switch on while pressing the start/ stop button and the reverse stitch button. The lcd shows the factory setting mode. Press "8 adjust" key. 2. Set the stretch stitch balance dial vertical. 3. Attach the satin stitch foot (f). Sew test patterns a...

  • Page 39: Mechanical Adjustment

    37 mechanical adjustment knee lifter to adjust: 1. Turn the power switch on while pressing the start/ stop button and the reverse stitch button. The lcd shows the factory setting mode. Press "knee lifter" key. 2. Attach the knee lifter. Press "mem1" key when the knee lifter is free. 3. Push the knee...