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From the library of: Superior Sewing Machine & Supply LLC

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Содержание B706

Страница 1: ...From the library of Superior Sewing Machine Supply LLC ...

Страница 2: ...iper mechanism 9 Quick back mechanism 9 OJ Needle and rotary hook timing adjustments 20 Automatic presser lifter mechanism 9 I1J Feed dog height adjustment 21 DISASSEMBLY 10 I Feed timing adjustment 21 0 Presser height adjustment 21 OJ Cover 10 I Synchronizer adjustment 22 I1J Presser 10 I Rotary hook II Thread trimmer djustment 23 I Tension release lever adjustment 24 0 Thread trimmer II Thread w...

Страница 3: ...eedle bar bushing U 0 and needle bar bushing D 0 I Lower shaft and rotating hook mechanism I When the pulley 0 turns in the direction indicated by the arrow the movement is transmitted by the upper shaft bevel gear 8 mounted to the upper shaft 8 to vertical shaft bevel gear U 8 mounted on the top of the vertical shaft G 2 The movement is then transmitted by vertical shaft bevel gear D 8 mounted on...

Страница 4: ...lar arc 3 The feed bar 8 is moved back and forth by the horizontal feed bar shaft 0 mounted to the horizontal feed rocker shaft 8 4 The crank rod fi is moved up and down by the feed cam 8 5 The horizontal feed shaft connected to the crank rod is then moved in i circular arc 6 The horizontal feed arm Cl connected to the feed shaft is also moved in a circular arc 7 The movement of the feed dog mount...

Страница 5: ... back and forth by the wick hanger 0 mounted to the feed rocker shaft f 4 The vertical feed connecting rod 6 is moved up and down by the vertical feed eccentric wheel Gi mounted to the upper shaft f 5 The feed lifting rocker shaft arm is moved in a circular arc by the vertical feed connecting rod 6 6 The feed bar 0 is moved up and down by the feed lifting arm 4D mounted to the feed lifting rocker ...

Страница 6: ...ead take up arm via the counterweight and needle bar crank 3 Felt is mounted on the needle bar crank in order to prevent excess oil discharge or oil clogging and oil is supplied to the needle bar connecting rod 4 The oil that accumulates in the thread take up shield is supplied to the needle barO and needle bar bushings U and D via the oil wick 8 5 The oil is held inside by the rubber stopper 8 in...

Страница 7: ... m column is supplied to lower shaft bushing R 0 the horizontal feed rocker shaft 0 and the vertical feed shaft 8 via the arm channel 3 Pump mechanism When the vanes at the bottom of the vertical shaft turn the centrifugal force sucks the oil up through the hole in the center The oil is then expelled from the outlets at the ends of the spinal chambers to the various oil tubes In addition a plunger...

Страница 8: ...ver assembly 8 is kept pressed toward the trimmer solenoid 8 by the cam lever return spring f the trimmer cam lever assembly 8 does not engage with the trimmer cam 0 and the movable knife holder 8 does not function In addition the trimmer lever 8 is pressed by the trimmer lever spring CD so that the movable knife holder 8 does not move 2 Condition when a trim signal is input When the foot Pedal is...

Страница 9: ...top When the trim signal stops t he trimmer solenoid 8 returns the trimmer cam lever assembly 8 is pushed by the cam lever return spring G and the toller shaft ofthe trimmer cam lever assembly 8 separates from the trimmer came The trimmer connecting rod fD and the movable knife holder 8 are returned to their original positions in the directions indicated by the arrows by the trimmer lever spring C...

Страница 10: ...ing for the above operation is too early it will affect the loop spreading of the movable knives and errors in thread trimming may occur Needle thread 4 The needle and bobbin threads hooked by the movable knife in step 3 are spread out to a fan shape by the shape of the knife and as they are spread out gradually by the thread spreader they are cut by the tip of the fixed knife At this time the thr...

Страница 11: ... it is returned to its original position by a return spring and the machine resumes forward stitching I Thread wiper mechanism 8707 8716 8747 When the needle upper stop signal is input there is a delay of 85 ms and then the solenoid 0 functions the thread wiper lever 8 moves the thread wiper 8 via the grooved link 0 and the neelde thread is wiped on top of the material after thread trimming When t...

Страница 12: ...bly 7 Remove the slide plate e 8 Remove the two screws 6 and then remove the needle plate 48 II Presser I Loosen the two set screws 8 and remove the feed dog G Use the presser lifter lever to raise the presser assembly 2 Loosen the set screws 0 and remove the presser foot 8 Remove the screw and then remove the thread wiper holder 3 Remove the screw 8 and then remove the presser spring bar O the pr...

Страница 13: ...r lever 0 side Remove the bolt 41 and then remove the knife holder assembly 0 the movable knife holder fl and the trimmer connecting rod 0 Remove the trimmer lever spring G Remove the screw e and then remove the thread tension lever fl Remove the screw and then remove the trimmer solenoid CD Move the trimmer cam leverassembly Gil in the direction indicated by the arrow and then remove the stop rin...

Страница 14: ...ng rock shaft 8 toward the left side The oil rejector 8 and the feed lifting arm 8 will also come off 5 Loosen the two set screws CD on the right side of the feed rock shaft G and then remove the collar 6 Remove the wick fD from the feed bar arm G 7 Loosen the set screw e on the feed rock shaft arm and the two set screWS on the feed bar arm G 8 Tap wedges into the notches in the feed rock shaft ar...

Страница 15: ... the feed rock shaft fl feed rock shaft arm tD and feed bar 8 Needle bar mechanism Needle bar bushing U I Tilt the machine 2 Remove the needle bar thread guide G 3 Remove the wick 8 from the top of the needle bar bushing U 4 Loosen the set screw 8 and remove the needle bar 8 and needle bar clamp 8 Remove the slide block 5 Remove the oil cap 8 loosen the set screw 8 and remove the thread take up su...

Страница 16: ...ass it through the needle bar clamp 6 Pass the wick through from needle bar bushing U fD Refer to the illustration 7 Turn the pulley and set the needle bar to the lowermost position 8 Align the second reference line from the bottom on the needle bar fD with the bottom end of needle bar bushing oe Threading the wicks l Thread the wick through the thread take up arm assembly 8 2 Thread the wick into...

Страница 17: ...ector G and the horizontal feed rock shaft arm 41 8 Fit the feed rock shaft 4D into the set collar 0 and then secure it with the screw 8 so that it moves easily with no play Secure the feed rock shaft arm 4D with the screw 41 in a position where the level feed arm link assembly moves easily Secure the feed lifting arm 8 and the feed bar arm with the screws fD in a position where the feed dog G div...

Страница 18: ...CJ 8 Mount the taper pin onto the arm bed 9 Mount the feed lifting rock shaft 8 and the feed lifting arm Cl with the set screw G so that they move easily with not play on the taper pin 10 Fit the side block G of the feed lifting arm C1 into the forked part of the feed bar 8 and then confirm that it slides easily II Fit the screw fJ into the crank rod fD and the feed lifting rock shaft fl and then ...

Страница 19: ...instructions on adjusting the tension releasing lever 7 Mount the movable knife holder 4D onto the arm bed and then mount the knife holder assembly 41 and then trimmer connecting rod 8 with the bolt Cl 8 Mount the trimmer lever spring and the trimmer lever fJ onto the forked shaft 0 and secure them with the screw fl 9 Mount the thread trimmer connecting rod 8 to the thread trimmer lever fJ with th...

Страница 20: ...DA X 1 DB X 1 re o B714 DA X 1 DB x 1 B716 DA X 1 DB X 1 B747 DB X 1 I Mount the needle plate 2 Mount the rotary hook 0 onto the lower shaft 0 and secure it with the screw 8 3 Mount the rotary hook position bracket 0 with the screws 8 1 1 5 mm 4 Mount the needle bar thread guard 8 onto the needle bar and then secure the needle 8 with the set screw 8 5 Turn the pulley so that the needle bar rises f...

Страница 21: ...t with the screw 4 Mount the presser foot 8 onto the presser bar 8 with the screw 8 5 Adjust the height of the presser foot 8 to approximately 6 mm Cover l l Screw_ Thread wi er _ I Mount the tension regulator assembly 0 with the screw G The thread take up spring operating range is 8 mm and the tension is 20 to 30 kg 2 Mount the oil stopper plate 8 with the screws 8 3 Mount the oil cap 8 and the o...

Страница 22: ...bar bushing 8 After adjusting firmly tighten set screw 8 2 Rotary hook position 0 Reference line Turn the pulley slowly and align the bottom reference line on the needle bar 8 with the bottom ofthe needle bar bushing 8 With the needle bar in this position check that the rotary hook pointe is aligned with the needle center 0 and that the needle 0 to rotary hook point 8 gap is between 0 05 0 1 mm Lo...

Страница 23: ...ions indicated by the arrows When the feed dog angle has been adjusted check to confirm that its height has not changed I Feed timing adjustment Feed dog I Turn the pulley manually the area of the needle between the tip and the lower edge of the eye should be in alignment with the top surface of the needle plate when the feed dog completes the feed and retracts so that the tip of the feed dog is l...

Страница 24: ...8 and hole IC 8 are moved in the direction of machine rotation and rise when they are moved in the opposite direction Synchronizer Adjustment 8747 I Turn off the power of the machine If the hole IC s are to be adjusted it is important that the power first be turned off 2 Remove the synchronizer cover 3 Rotate the pulley towards you and stop the needle 7 mm above its lowest point The lower end ofth...

Страница 25: ...fe 8 Remove the needle plate 8 and the movable knife 8 only after the needle has been removed Assemble in the reverse order of disassembly 2 Adjustment of the fixed knife movable knife and lower thread finger 1 1 5 mm Fig 8 I After attaching the movable knife 8 and the fixed knife 8 depress the thread trimmerconnecting rod 8 and match up the marking on the movable knife holder Cl with the marking ...

Страница 26: ...Adjust so that the noise impact noise made by the presser foot when it is lifted is small Turn the adjustment nut 0 so that the space between the solenoid and the plunger f is 0 6 0 8 mm 2 Damper support joint adjustment Adjust so that the noise impact noise made by the presser foot when it comes down is small Se the feed dog in its lowest position Loosen the screw 8 and after adjusting the space ...

Страница 27: ... Refer to Needle and Rotary 20 Hook Timing Adjustment Needle to rotary hook gap r Refer to Needle and Rotary Hook Timing Adjustment 20 Improper threading f Threading 1 Rethread properly Bent needle blunt needle f Needle f Replace needle tip blocked needle hole Improper needle installation 1 Needle bias height r Reinstall properly Thread breaks i Exc ssive upper thread f Upper thread tension Adjust...

Страница 28: ...iming Adjustment Upper thread left at needle is too Adjust pretension short and doesn t remain in material Bobbin idles and bobbin thread Bobbin case idler prevention Replace idler prevention is too short to rise during thread 1 trimming screw spring Thread take up spring is too Thread take up spring Adjust thread take up weak to lift bobbin thread tension spring Upper thread tension too Increase ...

Страница 29: ...upper thread stroke spring Movable and fixed knives Check alignment of thread trimmer Align movable and fixed 23 r do not meet t holder and thread trimmer holder knives presser index marks Poor cutting by movable Movable and fixed knife Replace movable and fixed 23 r and fixed knives blades knives c lower thread is not cut Movable and fixed knives Check alignment of thread trimmer Align movable an...

Страница 30: ...resistance with rear gap Thread wiper does not pull upper thread up I from material v 1 Early timing pulls off Adjust operating time before tension disc closes Thread wiper operating time Adjust operating time 7 too short Thread wiper operating time Adjust operating time 7 too long Thread wiper strikes needle and does not 1 return v __ Automatic presser foot rises Adjust operating time of too 4uic...

Страница 31: ...NDUSTRIES LTD HEAD OFFICE No 35 9 CHOME HORITA DORI MIZUHO KU NAGOYA JAPAN 467 CABLE BROTHER NAGOYA TELEX BROTHER 4473696J J59743 13090153B Printed in Japan From the library of Superior Sewing Machine Supply LLC ...

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