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MECHANICAL ADJUSTMENT

BUTTONHOLE STITCH BALANCE

When sewing buttonholes, the stitches on each side of the buttonhole should have the

same stitch density, The range of 9 - 11 stitches in the right side row against 10 stitches in

the left side row is considered acceptable.

Sew a buttonhole and check both right and left row stitch densities.

Remove the cap.

If the left side row is denser than the right side row (A), turn the adjusting screw
counter-clockwise (in the direction of C).
If the right side row is denser than the left side row (B), turn the adjusting screw
clockwise (in the direction of D).

Attach the cap.

Содержание JEM GOLD 660

Страница 1: ...SERVICING MANUAL JEM GOLD 660...

Страница 2: ...HT AND ALIGNMENT 7 DISTRIBUTION OF NEEDLE SWING 8 NEEDLE DROP 9 NEEDLE BAR HEIGHT 10 HOOKTIMING 1 NEEDLE CLEARANCE TO HOOK 12 BACKLASH LOWER SHAFT GEAR 13 FEED DOG HEIGHT 14 STRETCH STITCH BALANCE 15...

Страница 3: ...2 SERVICE ACCESS FACE COVER To remove 1 Remove the screw and remove the face cover as shown below To attach 2 Follow the above procedure in reverse...

Страница 4: ...3 SERVICE ACCESS BED COVER To remove 1 Loosen the 5 screws and remove the bed cover To attach 2 Follow the above procedure in reverse...

Страница 5: ...ove 1 Remove the face cover and bed cover see pages 2 3 2 Pull out the pattern selector dial 3 Remove the screw A and rubber cushion 4 Loosen the screws B C D and remove the front cover To attach 5 Fo...

Страница 6: ...SERVICE ACCESS REAR COVER To remove 1 Remove the face cover bed cover and front cover see pages 2 3 4 2 Remove the screws A B C D E and rear cover To attach 6 Follow the above procedure in reverse 5...

Страница 7: ...e tension dial set at 4 Make sure the presser foot is lowered If the tension is out of the standard range adjust it as follows 1 Remove the front cover see page 4 2 If the thread tension is too tight...

Страница 8: ...the up position 1 Remove the face cover see page 2 2 Raise the presser foot and loosen the presser bar bracket screw and adjust the height 6 0 mm 3 Check to see if the presser foot is parallel to the...

Страница 9: ...cover see page 4 2 Set the pattern selector dial to maximum zigzag width stitch length dial at any position 3 Loosen the worm set screws 2 pcs 4 Hold the worm in place with a screwdriver or wrench an...

Страница 10: ...set at zigzag stitch in maximum zigzag width the clearance between the needle and the edge of the needle plate hole should be equal 0 2 mm or more at the left and right needle drop positions If not ma...

Страница 11: ...eedle at right needle drop position 2 Remove the face cover see page 2 3 Remove the set screw of the needle plate and pull out the bobbin holder 4 Turn the hand wheel toward you until the rotary hook...

Страница 12: ...needle position 2 Remove the bed cover see page 3 3 Remove the set screw on the needle plate and remove the needle plate and bobbin holder 4 Loosen the hexagonal screws on the lower shaft gear 5 Turn...

Страница 13: ...bobbin holder 3 Remove the bed cover see page 3 4 Loosen screws B and C and tighten screw A temporarily 5 Replace the needle with the test pin Turn the hand wheel toward you slowly by hand until the...

Страница 14: ...as follows 1 Remove the bed cover see page 3 2 Loosen the hexagonal socket screw 3 Turn the lower shaft bushing in the direction of B when the play at the point of the hook is too large Turn the lowe...

Страница 15: ...plate should be 0 75 to 0 85 mm if not adjust as follows 1 Set the stitch length dial at 4 and lower the presser foot 2 Turn the hand wheel toward you until the feed dog comes to its highest position...

Страница 16: ...an adjustment as follows 1 Set the pattern selector dial at 2 Place a piece of paper under the presser foot and turn the hand wheel toward you to check the forward A and backward B needle drop positi...

Страница 17: ...ainst 10 stitches in the left side row is considered acceptable 1 Sew a buttonhole and check both right and left row stitch densities 2 Remove the cap 3 If the left side row is denser than the right s...

Страница 18: ...t and left stitch widths should be even In an uneven setting the zigzag width claw will touch the cam when the pattern selector is turned 1 Remove the front cover see page 4 2 Adjust the line tack by...

Страница 19: ...18...

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