ELNA eXpressive 970 User manual
SERVICE MANUAL
MODEL: eXpressive 970
First Edition: 15 June 2016
1
CONTENTS
Replacing the Spool Stand...........................................................................................4
Replacing the Tension Unit Cover.................................................................................4
Replacing the Static head cover (Right) .......................................................................5
To Replace Right Cover and Left Cover .......................................................................6
Replacing the Base Cover and Bed Cover ...................................................................7
Checking the Thread Paths (1) .....................................................................................8
Checking the Thread Paths (2) .....................................................................................9
Replacing the Needle ................................................................................................. 10
Needle and Thread Reference Table .......................................................................... 11
Adjusting the Bobbin Thread Tension ......................................................................... 12
Checking the Lowest Position of the Needle .............................................................. 13
Replacing the Needle Bar Rest .................................................................................. 14
Replacing the Take-up Lever Cam Roller ................................................................... 15
Adjusting the Take up Lever Timing ............................................................................ 16
Replacing the Presser Foot Cam ...........................................................................17-19
Replacing and Adjusting the Presser Foot (1)............................................................ 20
Replacing and Adjusting the Presser Foot (2)............................................................ 21
Replacing the Presser Foot Return Spring and Washer.........................................22-24
Replacing the Thread Catcher.................................................................................... 25
Replacing the Thread Catcher Hook ......................................................................... 26
2
Replacing the Jump Solenoid..................................................................................... 27
Adjusting a Play in the Moving Head.......................................................................... 28
Replacing the Moving Head (1).................................................................................. 29
Replacing the Moving Head (2).................................................................................. 30
Adjusting the Needle Drop Position (Back or Forth) .................................................. 31
Adjusting the Needle Height....................................................................................... 32
Replacing the Needle Bar, Needle Spring and Cushion............................................. 33
Replacing the Rotation Stopper Plate ........................................................................ 34
Replacing the Thread Take-up Lever .......................................................................... 35
Adjusting the Check Spring Tension ........................................................................... 36
Adjusting the Check Spring Stroke ............................................................................ 37
Adjusting the Thread Catcher Holder ......................................................................... 38
Replacing the Thread Catcher Loop Tape .................................................................. 39
Replacing the Lateral Moving Unit.............................................................................. 40
Adjust the Hook Timing............................................................................................... 41
Adjusting the Position of the Hook Stopper ................................................................ 42
Replacing the Thread Cutter Driving Roller................................................................ 43
Replacing the Dynamic Cutter Blade.......................................................................... 44
Replacing the Static Cutter Blade............................................................................... 45
Adjusting the Static Cutter Blade................................................................................ 46
CONTENTS
3
Adjusting the Dynamic Cutter Blade........................................................................... 47
Adjusting the Bobbin Thread Holder........................................................................... 48
Adjusting the Thread Keeper ...................................................................................... 49
Adjusting the X-carriage Belt Tension......................................................................... 50
Replacing the X-carriage Belt..................................................................................... 51
Adjusting the Y-carriage Belt Tension.......................................................................... 52
Replacing the Y-carriage Belt...................................................................................... 53
Adjusting the Timing Belt Tnsion ................................................................................ 54
Replacing the Timing Belt........................................................................................... 55
Adjusting the Motor Belt Tension ................................................................................ 56
Replacing the Motor Belt ............................................................................................ 57
Replacing the DC Motor ............................................................................................. 58
To Reset Motor Drive Time ......................................................................................... 59
Adjusting the Needle Upper Shaft Timing................................................................... 60
Adjusting the Moving Head Stop Position................................................................... 61
Adjusting the Needle Stop Position ............................................................................ 62
Adjusting the Carriage Home Position........................................................................ 63
Securing the Cables in the Moving Head (Upper Part) .............................................. 64
PARTS LIST ......................................................................................................... 65-108
CONTENTS
4
Replacing the Tension Unit Cover
Setscrews
Spool stand
Tension unit cover
To remove:
1. Remove the setscrews and spool stand.
To attach:
2. Attach the spool stand and tighten the setscrews.
Setscrews
Replacing the Spool Stand
To remove:
1. Remove the setscrews and tension unit cover.
To attach:
2. Attach the tension unit cover and tighten the setscrews.
Setscrews
5
To remove:
1. Loosen the RCS mounting arm knob and remove it.
2. Remove caps, and two setscrews (A).
Remove the static head cover (right).
3. Disconnect the LED lamp connector and
K-board connector.
To attach:
4. Connect the LED lamp connector and K-board
connector.
5. Attach the static head cover (right) with the two
setscrews (A). Attach the caps.
6. Attach the RCS mounting arm knob.
Caps
Replacing the Static Head Cover (Right)
RCS mounting arm knob
Setscrews (A)
Hooks
LED lamp connector
K-board connector
6
Hook
Upper hook 1 Upper hook 2
Static head cover (right)
Right Cover
To remove:
1. Remove head cover (right).
Unhook the right cover from the right hook.
•Toremovetheheadcover,Unhookthecover
from upper hook 1, upper hook 2 and the
hook on handwheel side.
2. Remove caps and setscrews A.
Remove the right cover.
To attach:
3. Attach right cover with setscrews A and caps.
4. Attach the head cover (right).
•Donotbindcordswhenattachingtheheadcover
(right).
Left Cover
To remove:
1. Remove caps and setscrews B.
Remove the left cover.
To attach:
2. Attach left cover with setscrews B and caps.
Cap, Setscrews A
Cap, Setscrews B
To Replace Right Cover and Left Cover
7
Base Cover
To remove:
1. Remove the six setscrews (A).
2. Lift the back of the machine and remove it from the
base cover.
To attach:
3. Attach the machine into the base cover.
4. Tighten the six setscrews (A) securely.
Replacing the Base Cover and Bed Cover
Bed Cover
To remove:
1. Remove the setscrew A. Remove the bed cover.
To attach:
2. Attach the bed cover with the setscrew A.
Setscrews (A)
Setscrew A
8
A
Detecting roller
To avoid seam puckering, skipped stitches or thread
breaking, keep the thread paths in the best condition.
1. Tension control, detecting roller
a) Detecting rollers should spin smoothly.
b) Tension controls and detecting rollers
should be free of lint or dust.
2. Thread guide hole
a) There should be no burrs or scratches.
3. Thread take-up lever
a) There should be no burrs or scratches.
4. Lower guide plate
a) There should be no burrs or scratches.
5. Needle
a) The needle should not be bent or blunt.
To check the needle:
Touch the tip of the needle and slide it over on your nail
and slid it lightly.
The needle must be blunt if there is any scratch on your
nail after sliding the needle on your nail.
In that case, replace the needle.
Place the flat side of the needle onto something flat
(needle plate, glass, etc.). The gap (A) between the
needle and the flat surface should be consistent.
Replace the needle if the gap is not consistent.
Checking the Thread Paths (1)
9
6. Needle plate
a) There should be burrs or scratches.
7. Presser foot
a) There should be no burrs or scratches,
especially inside of the presser foot hole.
b) There should be no warp in the presser
foot.
8. Hook race
a) There should be no burrs or scratches.
b) The tip of hook race should not be blunt.
c) There should be no detectable play in the hook
and hook race.
9. Thread keeper
a) There should be burrs or scratches,
especially on the tip of the thread keeper.
10. Check spring
a) The check spring should not be worn.
Checking the Thread Paths (2)
Upper side
Lower side
Hook
Thread keeper
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