SM Sew Mini Delux (525B)
Contents
1. 0 05 mm TO ADJUST 1 Select the maximum width zigzag stitch J 2 Remove the presser foot needle plate A and bobbin holder B 3 Turn the handwheel toward you to bring the hook point behind the needle 4 Loosen 2 setscrews C and adjust the clearance by turning the screw F in and out 5 Tighten 2 setscrews C 6 Check the clearance in the right and left needle positions 7 Attach the bobbin holder needle plate and presser foot NOTE Match the bobbin holder convex part D to the edge of needle plate base E when attach the needle plate C Setscrews Hook point 0 05 0 1mm Needle must be center Sew Mini 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 2 7 3 8mm 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 NOTE Before performing this adjustment check the needle to hook timing TO ADJUST 1 Select the maximum width zigzag stitch S 2 Remove the presser foot needle plate A and bobbin holder B 3 Turn the handwheel toward you until the hook point meets the right side of the needle 4 Remove the face cover and loosen the setscrew C 5 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 se2. SERVICE MANUAL SEW MINI DELUX SERVICE ACCESS 1 FACE COVER 1 1 1 1 11 SERVICE ACCESS 2 FRONT COVER 1 1 1 ADJUSTING THREAD TENSION CONTENTS ADJUSTING NEEDLE DROP POSITION sssitersncscneecenteonisernanicesi satnoeeabannnaansantenqeoaneananniee ADJUSTING NEEDLE SWING ADJUSTING NEEDLE TO HOOK TIMING vvs ADJUSTING CLEARANCE BETWEEN NEEDLE AND HOOK POINT ADJUSTING NEEDLE BAR HEIGHT ADJUSTING STITCH LENGTH DISENGAGEMENT OF CAM FOLLOWER weidera o ea Osid ADJUSTMENT MOTOR BELT ENSDIOD vpn SETTING POSITION OF PARTS ON UPPER AND LOWER SHAFT eocen Sew Mini SERVICE ACCESS 1 FACE COVER ie Remove the face cover by removing the setscrew A Face cover Sew Mini SERVICE ACCESS 2 FRONT COVER TO REMOVE 1 Remove the face cover 2 Pull out the dial and remove the set screws A E 3 Loosen the set screws F G 4 Remove the front cover NOTE Do not remove the set screws H TO ATTACH 5 Follow the above procedure in reverse Dial Front cover Rear cover Sew Mini ADJUSTING THREAD TENSION TO CHECK The standard upper thread tension should be 75 90g when pulling the thread polyester thread 50 with setting the tension dial at 4 Make sure the foot should be lowered If the tension is out of the standard range adjust it as follows TO ADJUST 1 Remove the
3. face cover and the front cover 2 Turn the adjusting screw C in the direction of A when the upper thread tension is too tight Turn the adjusting screw C in the direction of B when the upper thread tension is too loose 3 Attach the front cover and the face cover C Sew Mini ADJUSTING NEEDLE DROP POSITION The clearance between the needle and side edges of the needle hole should be 0 2 mm or more when the maximum width zigzag stitch lt is selecte And the neddle should drop in the center of the needle hole when the straight stitch is selected TO ADJUST 1 Remove the face cover 2 Select the straight stitch lt 5 and the zigzag stitch Z 3 Loosen the setscrew A and adjust the needle drop position by turning the eccentric pin B NOTE Adjust the direction of eccentric in the lower side 4 Tighten the setscrew A gt 5 Attach the face cover Needle hole Eccentric EA Goo 7 0 0 2mm or more l l l lt 0 2mm or more Sew Mini ADJUSTING NEEDLE SWING TO CHECK Adjust the needle swing according to the following procedure if the needle bar starts mov ing sideways while the needle is in the fabric when sewing the zigzag pattern S with maximum zigzag width TO ADJUST 1 Remove the front cover 2 Set the pattern selector dial at maximum zigzag width lt 3 Loosen two setscrews 4 Adjust the needle swing by turning the handwheel while holding the wor
4. m so as not to rotate it until the needle swing starts at 1 2mm above the needle plate after the needle has come out of the right side of the needle hole 5 Tighten two setscrews 6 Mount the front cover Upper shaft worm Sew Mini ADJUSTING NEEDLE TO HOOK TIMING The amount of ascending travel of the needle from the right lowest position to where the hook point meets the right side of the needle should be 1 7 to 2 8mm in the maximum width zigzag stitch pg TO ADJUST Select the maximum width zigzag stitch Remove the presser foot needle plate A and bobbin holder B Remove the front cover Turn the handwheel toward you to bring the needle to the right lowest position Loosen the 2 setscrews C on the lower shaft gear Raise the needle 2 0mm from the lowest position While holding the handwheel as not to move the needle bar rotate the hook race until the hook point meets the right side of the needle Tighten the 2 setscrews C Attach the front cover 0 Attach the bobbin holder needle plate and presser foot APS sr NOTE Match the bobbin holder convex part D to the edge of needle plate base E when attach the needle plate Setscrews Hook point meets the right side of the needle EE dn J Lower shaft gear 6 Sew Mini ADJUSTING CLEARANCE BETWEEN NEEDLE AND HOOK POINT The standard clearance between the needle and hook point should be 0 10 to
5. tscrew C 7 Attach the face cover bobbin holder and needle plate Setscrews Hook point Needle 2 7 3 3mm gt Upper edge of needle eye Hook race unit Sew Mini ADJUSTING STITCH LENGTH When select the maximum stitch stitch length should be 3 0mm TO ADJUST 1 Set the pattern selector dial at maximum stitch length 2 If the stitch length is longer than 3 0mm turn the adjusting screw in the direction A lf the stitch length is shorter than 3 0mm turn the adjusting screw in the direction B Adjusting screw Sew Mini DISENGAGEMENT OF CAM FOLLOWER TO CHECK Too narrow clearance between the cam follower and the top convex of zigzag cam may often cause difficulty in turning of the pattern selector dial or can not correct pattern 1 Set the pattern selector dial at lt D 2 Remove the face cover and front cover 3 Turn the hand wheel toward you and put the cam follower to the zigzag cam 4 Loosen the setscrew 5 Move adjusting plate in the direction of arrow until to touch to the releasing arm and tighten set SCrew NOTE After this adjustment check that the clearance between the zigzag cam and the cam follower is 0 3mm when putting the cam follower releasing arm onto position A of pattern select cam 6 Attach the front cover and face cover ZZ cam Cam follower Cam follower ZZ cam Setscrew A Pattern selector cam Releas arm re Pa
6. ttern selector cam Adjusting plate 10 Sew Mini ADJUSTING MOTOR BELT TENSION The correct motor belt tension is when the deflection of motor belt is about 7mm 9mm When pushing the motor belt by finger with a 100 gram load TO ADJUST 1 Remove the face cover and front cover 2 Loosen the setscrews A and B and adjust the deflection 4 Tighten the setscrews A and B Deflection 9mm N 7 11 Sew Mini SETTING POSITION OF PARTS ON UPPER AND LOWER SHAFT The setting positions of the parts on the lower shaft are as shown below The setting angle of the upper shaft bevel gear setscrew A lower shaft bevel gear setscrew B and the feed cam C setting mark should be at the top when needle bar comes to it s lowest position Setscrew A Upper shaft sta e R CJ Fa MR IE Setscrew B Setting mark 12
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