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ELNA eXperience 620, Руководство по обслуживанию, Страница: 20 / 38

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18

MODEL: eXperience 620

A

B

NEEDLE THREAD TENSION

When the polyester sewing thread #50 (white) is passed through and pullead up as in fig. 1, the thread

tension should be 75 to 90 grams (the thread pulling speed: Aprox. 110 mm/sec) with the thread

tension dial set at "auto). If the tension is out of the standard range, adjust it as follows.

ADJUSTMENT PROLEDURE:

1. Set the thread tension dial at "AUTO".

2. Remove the face cover (see page 9).

3. Turn the lead screw to adjust the needle thread tension.

If the thread tension is too tight, turn the lead screw in the direction of "A".

If the thread tension is too loose, turn the lead screw in the direction of "B".

4. Check the thread tension again and reattach the face cover.

Needle thread: Polyester sewing

thread # 50 (white).

Pull the thread at a speed of 110 mm/sec, in the

direction of the arrow.

Lead screw

Содержание eXperience 620

Страница 1: ...SERVICE MANUAL eXperience 620...

Страница 2: ...E GEAR AND LOWER SHAFT GEAR 15 FEED DOG HEIGHT ADJUSTMENT 16 ZIGZAG SYNCHRONIZATION 17 NEEDLE THREAD TENSION 18 STRETCH STITCH FEED BALANCE 19 REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREADER PLATE 2...

Страница 3: ...ND THREAD USE A 11 BLUE TIP NEEDLE ADJUST THE PRESSER BAR LEVEL TO MAKE THE PRESSURE STRONGER SEE MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT SEE MECHANICAL ADJUSTMENT NEEDLE TO HOOK TIMING SEE MECHANICAL...

Страница 4: ...CORRECTLY THREADED BOBBIN 2 TOO MUCH THREAD IS AROUND ON THE BOBBIN 3 LINT IS STUCK INSIDE THE BOBBIN HOLDER 4 THREAD QUALITY IS TOO LOW 5 THREAD IS JAMMING AROUND THE BOBBIN THREAD BOBBIN CORRECTLY A...

Страница 5: ...NT BACKLASH LOWER SHAFT GEAR ELIMINATE THE LOOSENESS SEE PART REMOVAL AND REPLACEMENT DRIVING MOTOR DC MOTOR OIL ALL MOVING PARTS P 15 P 27 P 36 7 DEFORMATION PATTERN 1 INAPPROPRIATE FEED BALANCE 2 IN...

Страница 6: ...4 MODEL eXperience 620 SERVICE ACCESS 1 FACE COVER UNIT TO REMOVE 1 Remove the cap and setscrew 2 Remove the face cover TO ATTACH 3 Follow the procedure above in reverse Setscrew Cap Face cover...

Страница 7: ...TO REMOVE 1 Raise the carrying handle and remove the setscrew A 2 Open the top cover and remove the setscrew B 3 Lift up the top cover and remove it from the rear side TO ATTACH 4 Follow the procedure...

Страница 8: ...G THE BELT COVER TO REMOVE 1 Raise the carrying handle and loosen the screw A 2 Remove the cap and the screw B 3 Loosen the screw C and the belt cover TO ATTACH 4 Follow the procedure in reverse Setsc...

Страница 9: ...he bed cover unit TO ATTACH 3 Push the drop feed dog lever to the left 4 Attach the bed cover unit and tighten the setscrews A REPLACING THE BASE TO REMOVE 1 Remove the setscrews A B C D and E 2 Remov...

Страница 10: ...Then remove the front cover unit 4 Disconnect the connector for printed circuit board F and flexible flat cable from the printed board A NOTE Never pull on cord when disconnect the cables from the ci...

Страница 11: ...elt cover See page 4 5 6 2 Loosen the setscrews A B C and D then remove the cap and setscrew E 3 Lower the presser foot lifter and remove the rear cover from the presser foot lifter section first TO A...

Страница 12: ...USTING PRESSER FOOT HEIGHT AND ALIGNMENT When the presser foot is raised the clearance between the presser foot and the needle plate should be 5 7 to 6 3 mm 1 Remove the face cover and raise the press...

Страница 13: ...ot in the center of the needle plate hole when the straight stitch is selected or if the clearance between the needle and edge of the needle plate hole on both side is less than 0 2 mm when the stitch...

Страница 14: ...obbin holder Remove the bed cover see page 7 3 Lower the needle bar at its lowest position by turning the handwheel toward you 4 Loosen the screws of lower shaft gear 5 Raise the needle bar further 3...

Страница 15: ...eedle drop position to 0 0 left most position then turn off the power switch 2 Remove the needle plate and bobbin holder 3 Align the tip of rotary hook with the right side of the needle in ascending t...

Страница 16: ...to bring the tip of the hook behind the test pin and adjust the clearance between the test pin and the tip of rotary hook to 0 10 to 0 05 by moving the rotary hook set plate up or down 5 Tighten the s...

Страница 17: ...ay the hook race with fingers Check the play It should be 0 8 mm or less If there is more than 0 8 mm play adjust as follows ADJUSTMENT PROCEDURE 1 Remove the bed cover and loosen the hexagonal screw...

Страница 18: ...oward you until the feed dog comes to its highest position 3 Remove the bed cover see page 7 4 Loosen set screw A and nut 5 Turn the adjusting screw C in the direction of E to raise the feed or turn t...

Страница 19: ...mum zigzag width 3 Turn the handwheel toward you and stop turning when the needle starts its sideward movement and loosen setscrew 4 If the needle height is higher than 7 5 mm turn the upper shaft shi...

Страница 20: ...st it as follows ADJUSTMENT PROLEDURE 1 Set the thread tension dial at AUTO 2 Remove the face cover see page 9 3 Turn the lead screw to adjust the needle thread tension If the thread tension is too ti...

Страница 21: ...ndard figure length of five pieces of figure 8 is 33 39 mm 4 Remove the 2 setscrews Then remove the base cap 5 If the length is longer than 39 mm turn the adjusting screw in the direction of C 6 If th...

Страница 22: ...reader knob and pull the needle threader plate A out to remove it FIG 1 2 To install the needle threader plate line the groove of the threader with the pin B and push the plate up to snap fit TO ADJUS...

Страница 23: ...gram for locating the connector post on the circuit board TO DISCONNECT THE CONNECTORS 1 Grasp the connector body with your fingers and pull Do not pull the lead wire it may damage the contact sleeves...

Страница 24: ...EPLACING ANY PARTS REPEAT THE DIAGNOSTIC TEST UNTIL THE PROBLEMS HAS BEEN RESOLVED TURN ON THE POWER SWITCH IF ANY OF FOLLOWING PROBLEMS OCCUR TAKE THE REC OMMENDED ACTIONS IN THE ORDER THEY ARE SHOWN...

Страница 25: ...l LED displays and blinks in 1 sec Interval LED displays pressed button LED displays LED displays the of button S1 to S8 LED displays or LED displays up or down Pull the buttonhole lever to the front...

Страница 26: ...be displayed on the LED for 1 second Depress the foot control down all the way and release it Press the of stitch width button 11 will be displayed on the LED for 1 second Press the of stitch length b...

Страница 27: ...otor Replace board A The end of test All of the test is finished turn off the power switch SELF DIAGNOSTIC TEST OPERATION Press the of stitch width button 12 will be displayed on the LED for 1 second...

Страница 28: ...RCUIT BOARD A TO REMOVE 1 Remove the front cover see page 8 2 Unplug the connectors from the board A 3 Remove the 3 screws and remove board A TO INSTALL 1 To install follow the above procedure in reve...

Страница 29: ...ove in reverse Check to ensure that the slide volume moves smoothly back and forth REPLACING PRINTED CIRCUIT BOARD F TO REMOVE 1 Remove the front cover unit Remove the printed board K 2 Remove the set...

Страница 30: ...crews then remove the DC motor and belt TO ATTACH 3 Set the motor in machine and replace screws 4 Replace the motor belt 5 When applying approximately 300 grams pressure in the middle of the belt it s...

Страница 31: ...the printed circuit board A if you notice any browning discoloration or other abnormalities 2 Only install fuses with the correct rating If the fuse is loose bend the fuse clips inward to secure the...

Страница 32: ...1 Remove the front and rear covers see page 8 2 Remove the machine socket connector from the printed circuit board A 3 Remove the two set screws and remove the machine socket TO INSTALL 1 To install t...

Страница 33: ...EPLACING THE TRANSFORMER UNIT TO REMOVE 1 Remove the circuit board A See page 8 2 Remove the two setscrews and remove the transformer unit TO INSTALL 3 To install the transformer follow the above proc...

Страница 34: ...the zigzag width motor TO INSTALL 4 To install the zigzag width motor follow the above procedure in reverse NOTE 1 The setscrews A should be tightened at 5 7 kg of torque 2 Check to ensure that the u...

Страница 35: ...es 6 7 2 Remove the snap ring E 3 3 Remove the setscrews A B Remove the feed stepping motor TO ATTACH 4 Follow the above procedure in reverse NOTE Adjust the stretch stitch feed balance after the repl...

Страница 36: ...ing screw to the left until the screen display changes from L to H 7 Then turn the adjusting screw to the right until the screen display changes from H to L 8 Check if the led screen shows h when the...

Страница 37: ...inder spindle is set to the bobbin winding position and or when the bobbin winer spindle is returned to the sewing position 4 Tigthen the setscrew 5 Attach the top cover ON OFF 2 Press the of stitch l...

Страница 38: ...g but you should still check for possible lubrication needs whenever servicing machines OIL Use good quality sewing machine oil at the points A B C D E F G H I J K indicated by the black arrows GREASE...

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