Janome 659 User manual

SERVICING MANUAL
Model 659

CONTENTS
SERVICE ACCESS
Face cover ..................................................................................................................... 2
Belt cover ....................................................................................................................... 3
Base plate ......................................................................................................................4
Bed cover .......................................................................................................................4
Front cover .....................................................................................................................5
Rear cover......................................................................................................................6
Free arm cover............................................................................................................... 7
MECHANICAL ADJUSTMENT
Top tension.....................................................................................................................8
Presser bar height and alignment.................................................................................. 9
Needle swing................................................................................................................ 10
Distribution of needle swing..........................................................................................11
Needle clearance to hook ............................................................................................ 12
Backlash (lower shaft gear) ......................................................................................... 13
Needle bar height......................................................................................................... 14
Needle to hook timing .................................................................................................. 15
Feed dog height ........................................................................................................... 16
Button hole stitch balance............................................................................................ 17
Stretch stitch balance................................................................................................... 18
Zero feeding................................................................................................................. 19
Buttonhole function (1)................................................................................................. 20
Button hole function (2)................................................................................................ 21
Motor belt tension ........................................................................................................ 22
PART REMOVAL AND REPLACEMENT................................................................................
Threader plate.............................................................................................................. 23
Wiring of terminal block ............................................................................................... 24
1

FACE COVER
TO REMOVE:
1, Remove the 2 set screws and the face cover.
TO ATTACH:
2. Replace the face cover (B) by lightly tightening the 2 set screws (A).
3. Close the face cover (B), carefully aligning it with the arm.
Then tighten the screws firmly.
2

BELBEL
BELBEL
BELT COVERT COVER
T COVERT COVER
T COVER
TO REMOVE:
1. Loosen the set screw (A), and remove the belt cover rib (B) by pulling out the belt cover (C)
rib from the front cover (D).
TO ATTACH:
2. Mount the belt cover rib (B) to the front cover (D), then mount the belt cover (C) and tighten
the set screw.
3

BASE PLABASE PLA
BASE PLABASE PLA
BASE PLATETE
TETE
TE
1. Remove 3 set screws (A).
2. Remove the base plate (C).
BED COVER
1. Remove 2 set screws (B).
2. Remove the bed cover (D).
* When you attach the bed cover (D), set the drop lever (C) at the left position.
4

FRONT COVERFRONT COVER
FRONT COVERFRONT COVER
FRONT COVER
TO REMOVE:
1. Remove the belt cover (See page 3).
2. Remove the selector dial (M) and dial plate (L).
3. Remove the cap (N) , then set screws (A), (B). (C) and Arm thread guide (K). Loosen the
set screws (D) and (E).
4. Remove the notches (H), (I) and (J).
5. Push and lower the part (F) gently, then pull it toward you to remove the front cover unit
(G).
TO ATTACH:
6. Follow the above procedure in reverse.
5

REAR COVERREAR COVER
REAR COVERREAR COVER
REAR COVER
TO REMOVE:
1. Remove the belt cover (See page 3).
2. Remove the cap (G).
3. Remove the set screws (A), (B), (C), (D), (E) and (F).
4. While pushing up the rear cover (O) near the notches (L), (M) and (N), pull upper part of
the rear cover (See (Y) below).
5. Pull lower part of the rear cover toward you and slide it to the left (See (X) below).
While sliding the rear cover to the left, clear the presser bar lifter (h) through the slit (See
(Z) below).
TO ATTACH:
6. Follow the above procedure in reverse.
6

FREEFREE
FREEFREE
FREE ARM COVERARM COVER
ARM COVERARM COVER
ARM COVER
TO REMOVE:
1. Remove the set screw (A) and the needle plate (C).
2. Remove the bed cover (See page 4).
3. Remove the set screw (B) and the free arm cover (D).
TO ATTACH:
4. Follow the above procedure in reverse.
7

TOP TENSIONTOP TENSION
TOP TENSIONTOP TENSION
TOP TENSION
TO CHECK:
1. Set the tension dial (G) at “4” and raise the presser foot.
2. Pass the thread (A) between the discs and draw the thread (A) down around the check
spring holder as shown below.
3. Lower the presser foot and bring the thread (A) up.
4. Top tension should be 75-90g when pulling the thread (A) up in the direction (B).
* Use white polyester sewing thread size 50.
* If the tension is out of the range, adjust as follows:
Adjustment procedure:
1. Remove the front cover (See page 5).
2. Pull spring (C) away from the lead screw (D).
3. If the top tension is too loose, turn the lead screw (D) in the direction of (E).
If the top tension is too tight, turn the lead screw (D) in the direction of (F).
4, Attach the front cover.
8

PRESSER BAR HEIGHTPRESSER BAR HEIGHT
PRESSER BAR HEIGHTPRESSER BAR HEIGHT
PRESSER BAR HEIGHT ANDAND
ANDAND
AND ALIGNMENTALIGNMENT
ALIGNMENTALIGNMENT
ALIGNMENT
TO CHECK:
1. Raise the presser foot lever (B).
2. The distance between the zigzag foot (A) and the needle plate (C) should be 6.0 mm
(0.24").
If the height is greater or less than 6.0 mm (0.24"), adjust as follows:
Adjustment procedure:
1. Open the face cover.
2. Remove the set screw (G) and remove the lamp socket.
3. Raise the presser foot lever (B) and loosen the hexagon socket screw (D) on the presser
bar holder (E).
4. Adjust the distance between the zigzag foot (A) and the needle plate (C) to 6.0 mm
(0.24").
5. Tighten the hexagon socket screw (D) securely.
Note: when you tighten the screw (D), make sure that both sides of the zigzag foot (A)
are parallel to the feed dog slits (F) on the needle plate.
6. Fix the lamp socket (H) with set screw (G).
9

NEEDLE SWINGNEEDLE SWING
NEEDLE SWINGNEEDLE SWING
NEEDLE SWING
TO CHECK:
When sewing the zigzag pattern (with maximum zigzag width), if the needle bar starts moving
sideways while the needle is in the fabric, adjust the needle swing according to the following
procedure.
(The needle should start swinging when 2 to 3mm above the needle plate.)
Adjustment procedure:
1. Set the pattern selector dial at the maximum zigzag stitch width, and remove the front
cover (See page 5).
2. Loosen the two hexagon socket screws (A) on the upper shaft worm gear (B).
3. While holding the upper shaft worm gear in place, carefully turn the hand wheel and adjust
so that lateral needle swing starts from a position 2 to 3mm (C) above the needle plate after
the needle has come out of the right side of the needle plate hole.
Make sure the worm gear does not move side way, when turning the upper shaft.
Otherwise, the backlash between the worm and gear and the other gear (F) will change.
4. Tighten the two hexagon socket screws on the upper shaft worm gear.
Make sure that there is no backlash between the upper shaft worm gear and the other gear
and that smooth rotation is obtained.
If it is necessary to adjust the backlash of the gears, move the worm gear to the direction
of:
10

DISTRIBUTION OF NEEDLE SWINGDISTRIBUTION OF NEEDLE SWING
DISTRIBUTION OF NEEDLE SWINGDISTRIBUTION OF NEEDLE SWING
DISTRIBUTION OF NEEDLE SWING
When the pattern selector dial is set at the straight stitch (stitch No. 2), the needle should be
positioned at the center of the needle plate hole (A).
When the pattern selector dial is set at the zigzag (stitch No. 6), the clearance between the
needle and the edge of needle plate hole should be equal and it should be 0.2 mm or more, at
the left and right needle drop positions (B and C).
Adjustment procedure:
1. Set the pattern selector dial at the straight stitch (stitch No. 2)
2. Open the face cover, and loosen the hexagon socket screw (D).
3. Move the needle bar supporter E) to position the needle at the center of the needle plate
hole.
4. Tighten the hexagon socket screw (D).
5. Set the pattern selector dial at the maximum zigzag stitch width.
6. Turn the hand wheel and make sure that there is an equal clearance between the needle
and the edge of the needle plate hole at the left and right needle drop positions (B and C).
11

NEEDLE CLEARANCE TO HOOKNEEDLE CLEARANCE TO HOOK
NEEDLE CLEARANCE TO HOOKNEEDLE CLEARANCE TO HOOK
NEEDLE CLEARANCE TO HOOK
TO CHECK:
1. Set the pattern selector dial at the maximum zigzag stitch width.
2. Remove the set screw (A) on the needle plate, and detach the needle plate (B) and bobbin
holder (C).
3. Replace the needle with test pin #68368 (D).
4. Turn the hand wheel toward you slowly by hand until the needle bar reaches its lowest
position.
5. The clearance between the test pin #68368 (D) and the point of the hook (E) should be
between -0.10 and +0.05 mm.
Adjustment procedure:
1. Remove the bed cover (See page 4).
2. Loosen set screws (F), (G), and (H).
3. Tighten set screw (F) temporarily.
4. Move hook set plate (I) to either direction as shown by the arrow until the clearance
between the test pin #68368 (D) and the point of the hook (E) is between -0.10 and +0.05
mm.
5. Tighten the set screws (F), (G) and (H) securely.
6. Reattach the bed cover, bobbin holder and needle plate and remove the test pin #68368
(D).
12

BACKLASH (LOWER SHAFT GEAR)
TO CHECK:
1. Remove set screw (A) to remove the needle plate (B) and the bobbin holder (C).
2. Turn the hand wheel slowly toward you until the point of the hook (D) is between both ends
(E) of the feed dog.
3. Rotate the hook race (I) clockwise and counterclockwise by hand and check the play. It
should be within 0.8 mm (K).
* If there is more than 0.8 mm backlash (between the gears, adjust as follows:
Adjustment procedure:
1. Remove the bed cover (See page 4) and loosen hexagon socket screw (F).
2. Turn the lower shaft bushing (eccentric bushing) (G) in the direction of (H) when the play at
the point of the hook is too small.
3. Turn the lower shaft bushing (eccentric bushing) (G) in the direction of (I) when the play at
the point of the hook is too large.
4. Tighten hexagon socket screw (F) securely after adjustment.
5. Attach the bed cover.
13

NEEDLE BAR HEIGHTNEEDLE BAR HEIGHT
NEEDLE BAR HEIGHTNEEDLE BAR HEIGHT
NEEDLE BAR HEIGHT
When the point of the rotary hook exactly meets the right side of the size 14 needle (E) in
ascending travel of the needle bar from its lowest position at the right needle drop position with
the pattern selector dial at zigzag stitch (stitch No. 6), the distance between the upper edge of
the needle eye and the race of rotary hook (F) should be 3.0 to 3.6 mm.
Adjustment procedure:
1. Set the pattern selector dial at (maximum zigzag stitch width).
2. Remove the set screw (A) of the needle plate, and detach the needle plate (B) and bobbin
holder (C).
3. Tilt the head backward, and open the face cover.
4. Turn the hand wheel toward you until the rotary hook point exactly meets the right side of
the needle at the right needle drop position.
5. Loosen the hexagon socket screw (D) of the needle bar connecting stud.
6. Move the needle bar to provide a distance of 3.0 to 3.6 mm between the upper edge of
needle eye and the race of the rotary hook.
7. Tighten the hexagon socket screw (D) of the needle bar connecting stud.
8. Reattach the bobbin holder and needle plate.
14

NEEDLE TO HOOK TIMINGNEEDLE TO HOOK TIMING
NEEDLE TO HOOK TIMINGNEEDLE TO HOOK TIMING
NEEDLE TO HOOK TIMING
With the needle bar swung to the right at the maximum zigzag width, the amount of ascending
travel of the needle bar from its lower position to the position where the tip of the rotary hook
exactly meets the right side of the needle should be 1.4 to 2.0 mm.
Before the adjustment, be sure to check the needle bar height.
Adjustment procedure:
1. Set the pattern selector dial at maximum zigzag stitch width (stitch No. 6).
2. Remove set screw (A) on the needle plate to remove the needle plate (B) and bobbin
holder (C).
3. Remove the bed cover (See page 4).
4. Loosen hexagon screws (D) on the lower shaft gear (E).
5. Turn the hand wheel toward you to bring the needle bar 1.4 to 2.0 mm from its lowest
position (F) with the needle swing to the right.
6. While holding the hand wheel by hand to prevent the needle bar from moving, turn the
lower shaft gear in the direction of arrow until the tip of the rotary hook exactly meets the
right side of the needle (G).
7. Taking care not to affect the relationship between the rotary hook tip and the needle,
tighten the hexagon screws (D) on the lower shaft gear.
8. Attach the bed cover, bobbin holder and needle plate,
15

FEED DOG HEIGHT
Lower the presser foot and turn the hand wheel toward you until the needle bar comes to the
highest point of its travel.
In this condition, the height of the feed dog above the needle plate should be 0.75 to 0.85 mm.
Adjustment procedure:
1. Set the stitch length dial at “4”, and lower the presser foot (H).
2. Turn the hand wheel until the feed dog (G) comes to its highest position.
3. Remove the bed cover (See page 4).
4. Loosen set screw (A) and nut (B).
5. Turn the adjusting screw (C) to set the feed dog height at 0.75 to 0.85 mm above the top
surface of the needle plate (D). Turn the adjusting screw (C) in the direction of:
(E) to increase the height.
(F) to decrease the height.
6. Tighten the nut (B).
7. Tighten screw (A) and attach the bed cover.
16

BUTTONHOLE STITCH BALANCEBUTTONHOLE STITCH BALANCE
BUTTONHOLE STITCH BALANCEBUTTONHOLE STITCH BALANCE
BUTTONHOLE STITCH BALANCE
If there is a difference in stitch density between the right and left rows of a buttonhole, make an
adjustment in the procedure given below.
The left row should have 9 to 12 stitches compared with 10 stitches on the right row.
ADJUSTMENT PROCEDURE:
1. Attach buttonhole foot (R) and sew a buttonhole. Check the stitch density on the right
and left rows.
2. Remove the cap (G).
3. Loosen the hexagon socket screw (A) of the feed cam ring (B) without moving the ring
laterally.
4. If the left row is denser than the right row (E), turn the ring in the direction of (C).
If the right row is denser than the left row (F), turn the ring in the direction of (D).
5. Tighten the hexagon socket screw of the feed cam ring, and attach the cap (G).
17

STRETCH STITCH BALANCE
When a triple lock straight stitch (stitch No. 15) is sewn with the feed balancing dial (G) at the
standard setting mark “ 4 “, the stitch should forms as shown in the figure below.
If not balanced, make an adjustment as follows:
Adjustment procedure:
1. Remove the cap (F).
2. If the reverse stitch length (B) is shorter than the forward stitch length (A), turn the
adjusting set screw (E) in the direction of (C).
If the reverse stitch length (B) is longer than the forward stitch length (A), turn the adjusting
set screw (E) in the direction of (D).
3. Attach the cap (F).
18

ZERO FEEDINGZERO FEEDING
ZERO FEEDINGZERO FEEDING
ZERO FEEDING
TO CHECK:
1. Set the pattern selector dial at straight stitch (stitch No. 2) and the stitch length dial (D) at
“0”.
2. Place a piece of paper under the presser foot and lower the foot.
3. Check if the paper moves forward or backward when you turn the hand wheel toward you.
4. The machine should not feed a piece of paper with the above setting.
Adjustment procedure:
1. Remove the belt cover (See page 3).
2. Set the pattern selector dial at straight stitch (stitch No. 2) and the stitch length dial (D) at
“0”.
3. Place a piece of paper under the presser foot and lower the foot. Then turn the hand wheel
toward you by hand.
4. If the paper moves forward(E). Turn the adjusting screw (C) in the direction of (A).
If the paper moves backward (F), turn the adjusting screw (C) in the direction of (B).
5. Attach the belt cover.
19