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10

Adjusting Needle Bar Height

The standard distance between the upper edge of the needle eye and the upper surface

of the hook race should be in the range of 3.0 - 3.6 mm when the hook point meets the

right side of the needle in its ascending travel from the right lowest position of the

maximum width zigzag stitch (     ).

<TO ADJUST>

1 Select the zigzag stitch (     ) and set the stitch width dial at 5, then bring the needle to the

right lowest position.

2 Remove the face plate (see page 1).

3 Remove the needle plate and bobbin holder.

4 Turn the handwheel toward you until the hook point meets the right side of the needle.

5 Loosen the setscrew and move the needle bar up or down to adjust the needle bar height.

NOTE: Be careful not to rotate the needle bar.

6 Tighten the setscrew.

7 Attach the bobbin holder, needle plate and face plate.

NOTE:

Before performing this adjustment, check the needle to hook timing.

Setscrew

Needle

Alignment

3.0 - 3.6mm

Upper edge of

needle eye

Hook race unit

Needle plate

Bobbin holder

Upper surface of hook race

Setscrew

Summary of Contents for eXplore 320

Page 1: ...SERVICE MANUAL MODEL 320...

Page 2: ...ITION 8 ADJUSTING NEEDLE TO HOOK TIMING 9 ADJUSTING NEEDLE BAR HEIGHT 10 ADJUSTING CLEARANECE BETWEEN NEEDLE AND HOOK POINT 11 ADJUSTING BACKLASH BETWEEN HOOK DRIVE GEAR AND LOWER SHAFT GEAR 12 ADJUST...

Page 3: ...1 Service Access 1 FACE PLATE TO REMOVE Remove the cap and setscrew Remove the face plate TO ATTACH Attach the face plate with the setscrew Attach the cap Setscrew Face plate Cap...

Page 4: ...Access 2 BASE COVER TO REMOVE 1 Loosen setscrews 2 Take the base cover out TO ATTACH 3 Follow the above procedure in reverse Setscrew Setscrew Setscrew Base cover Setscrew Setscrew Setscrew Feed dog d...

Page 5: ...emove the face cover and the base cover see page 1 2 2 Remove dials A B 3 Loosen setscrews A B C 4 Unhook the tabs and remove the front cover TO ATTACH 5 Reverse the procedure above Dial A Dial B Tab...

Page 6: ...access 4 Rear cover TO REMOVE 1 Remove the face cover and front cover see page 1 3 2 Remove setscrews A B C and D Lower the presser foot Remove the rear cover from the part 1 2 to 3 in order TO ATTACH...

Page 7: ...n the range of 2 9 3 5 mm ADJUSTMENT PROCEDURE 1 Remove the face cover See page 4 2 Set the pattern selector dial at 3 Open the shuttle cover 4 Remove the shuttle race ring 5 Turn the handwheel toward...

Page 8: ...m TO ADJUST 1 Remove the face plate see page 1 and needle 2 Lower the feed dog below the needle plate Place a block 6 mm thick under the presser foot and lower the presser foot lifter 3 Loosen the set...

Page 9: ...handwheel to adjust the needle bar swing so that the needle starts to swing 2 3 mm above the needle plate in the right outflow 5 Tighten the setscrews on the worm securely 6 Attach the front cover NO...

Page 10: ...elected TO ADJUST 1 Remove the face plate see page 1 2 Select the straight stitch and set the stitch width dial at 5 3 Loosen the setscrew 4 Move the needle bar supporter so that the needle drops in t...

Page 11: ...aft gear 5 Turn the handwheel toward you to bring the needle to the right lowest position Then raise the needle 1 7mm from the lowest position 6 While holding the handwheel as not to move the needle b...

Page 12: ...he right lowest position 2 Remove the face plate see page 1 3 Remove the needle plate and bobbin holder 4 Turn the handwheel toward you until the hook point meets the right side of the needle 5 Loosen...

Page 13: ...sen the setscrew A 4 Turn the handwheel toward you to bring the hook point behind the test pin 5 Adjust the clearance to 0 1 to 0 05 mm by moving the hook base plate up or down 6 Tighten the setscrews...

Page 14: ...ews 3 If the play is too big turn the lower shaft bushing in the direction B If the gear engagement is too tight turn the lower shaft bushing in the direction A 4 Tighten the setscrews and attach the...

Page 15: ...et the stitch length dial at 4 2 Lower the presser foot Turn the handwheel to bring the feed dog to its highest position 3 Remove the base cover see page 2 4 Loosen the setscrew A and nut 5 Turn the a...

Page 16: ...ch length dial at S S 2 Place a piece of paper under the foot Turn the handwheel to check the needle marks 3 If the forward feeding A is longer than backward feeding B turn the adjusting screw in the...

Page 17: ...row against 10 stitches in the left side row is considered acceptable TO ADJUST 1 Sew a test buttonhole and count the stitches on each side 2 Remove the cap to access the adjusting screw 3 If the left...

Page 18: ...to check if the fabric is fed while sewing the bartacks 2 Remove the cap to access the adjusting screw 3 If the fabric is fed forward A turn the adjusting screw in the direction C If the fabric is fed...

Page 19: ...elector control at and the stitch length control at 4 2 Remove the front cover See page 5 3 Place a piece of paper under the foot and turn the handwheel If the paper is fed forward turn the adjusting...

Page 20: ...4 Remove the setscrews C and motor 5 To attach the motor follow the above procedure in reverse TO ADJUST THE MOTOR BELT TENSION 1 Slightly loosen the setscrews C 2 While pushing the middle of the moto...

Page 21: ...the threader thrust or hit against the side edge of the needle eye loosen the setscrew D and adjust the lateral position of the threader plate see Fig 2 2 If the hook C thrust against upper or lower...

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