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Necchi Supernova Instructions Manual

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Instructions
For
Servicing
The Necchi
Supernova
Sewing
Machine
1
Copyright -2004

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Summary of Contents for Necchi Supernova

  • Page 1 Instructions Servicing The Necchi Supernova Sewing Machine Copyright -2004...

  • Page 2: Table Of Contents

    ADJUSTING THE MOVEMENTS OF THE VARIOUS GROUPS OF PARTS IN RELATION TO EACH OTHER (TIMING THE MACHINE) - Timing of shuttle and needle bar in the SUPERNOVA - Timing of feed dog and needle bar Timing the regulating shaft of the stitch length re- gulating knob (Fig.

  • Page 3: Table Of Contents

    Pages IMPORTANT ADJUSTMENTS TO BE MADE AFTER THE REASSEMBLY OF THE UPPER GROUP OF THE ZIG ZAG MECHANISM 50 MINOR ADJUSTMENTS IN THE UPPER GROUP OF THE ZIG-ZAG MECHANISM THE FEED DOG 54 - Adjustment of any Looseness in the Feeding Mecha- nism 55 - Adjusting the Height of Teeth of the Feed Dog above the Needle Plate...
  • Page 4 Pages HOW TO REMOVE THE STITCH LENGTH REGULATING KNOB AND THE REGULATING SHAFT (Fig. 75) . HOW TO REASSEMBLE THE STITCH LENGTH REGULATING KNOB AND THE REGULATING SHAFT . H O W T O R E A S S E M B L E T H E F E E D E C C E N T R I C ROD N" D 85506 AND THE CONNECTING RODS OF THE STITCH LENGTH REGULATING MECHANISM ((Fig.
  • Page 5 Pages ASSEMBLING THE PARTS UNDERNEATH THE MOUNT ING PLATE N" C (A 26/1/1) OF THE AUTOMATIC DE VICE (Fig. 93) - Preparation of assembling the group as shown in fig. 94 101 - Preassembling of group Fig. 95 How to adjust the group of Fig. 95 in the mounting Plate N°...
  • Page 6 FOREWORD This service manual shall be used together with the instruction book for the SUPERNOVA Sewing Machine and with the parts catalogue for this machine. The maintenance of the SUPERNOVA Sewing Machine requires no special skill or knowledge. All that is needed is a certain mechanical aptitude and the availability of the necessary tools.
  • Page 7 The Automatic mechanism is driven by a suitable cam mounted on the upper shaft. The SUPERNOVA machine is provided with a built-in motor inside the arm, as well as a transformer which feeds the sewing light at 12 V and the motor at two different voltages giving two different speeds.
  • Page 8 For the mechanics we have available a tool kit containing all wrenches screw drivers and gauges for any repair and timing of the SUPERNOVA machine. Suggestions for the mechanics After a short examination of the machine, a good mechanic will be able to state with certainty whether the machine sews correctly or not and, consequently, whether repairs are required.

  • Page 9: Using The Correct Needle

    INSTRUCTIONS TO BE GIVEN TO THE CUSTOMER Using the correct needle. The needle must be selected in accordance with the type of material to be sewn, the kind of work to be performed and the thickness of the thread to be used (see « Needle and Thread Chart »...

  • Page 10: Correct Threading Of The Supernova When Using One Needle

    Correct threading of the SUPERNOVA when using one needle. Proceed as follows: Fig. 3 Bring the needle to its highest position by tiring the balance wheel towards you. Copyright -2004...

  • Page 11: Threading Of The Supernova When Using Two Need Les (Twin Needle)

    “T ", pull the thread through the needle eye, leaving about four inches of free thread hanging down from the needle. Threading of the SUPERNOVA when using two needles (twin needle). The threading of the SUPERNOVA with double needle is illustrated in Fig.

  • Page 12: To Disconnect The " Automatic

    The two threads must be inserted separately, one in each of the two thread guides " M " and " N " on the needle clamp. Fig. 4 To disconnect the “Automatic"'. This operation has to be done when the machine is at a standstill.

  • Page 13: Cleaning Of Shuttle Race And Feed Dog

    Changing from automatic sewing to straight sewing. Disconnect the "Automatic" as already explained on page 4. Remove the cams from the machine by proceeding as follows: Swing the Cam Disengaging Lever (at the rear of the arm) entirely to the left as far as it will go. Open the small cover on top of the arm and take out the cams.
  • Page 14 Note: To fasten the needle plate after having placed it in its re- ceptacle, push the lever shown in Fig. 6 in the direction of the arrow “A " and, at the same time, rotate it in the direction of the arrow "...
  • Page 15 Copyright -2004...

  • Page 16: Adjusting The Thread Tensions

    Fig. 10 and snap pins " Z " back into place (Fig. 9). Insert bobbin case, replace needle plate (as shown in Figs. 5 and 6) and lower the machine to its working position. Adjusting the thread tensions. The tensions of upper and lower thread are correctly balanced if both threads interlock in the center of the fabric, as shown in Fig.
  • Page 17 Fig. 11 Fig. 12 Fig. 13 Copyright -2004...

  • Page 18: Cleaning

    To correct this condition, make certain that the presser foot is down, then turn Tension Regulating Knob to the left. If tension of needle thread is too loose, or tension of bobbin thread is too tight, bobbin thread will lie straight along underside of fabric and needle thread will be pulled down to underside, being visible there in, the form of loops or small knots (Fig.

  • Page 19: Lubrication

    " C " in Fig. 15. Finally, after having taken out the cams, apply also one or two drops of oil to the point indicated by " E " (Fig. 15). Fig. 15 Use only Necchi oil. Copyright -2004...
  • Page 20 ADJUSTING THE MOVEMENTS OF THE VARIOUS GROUPS OF PARTS IN RELATION TO EACH OTHER (TIMING THE MACHINE) To obtain a continuous and satisfactory performance from the machine, the movements of the various groups of parts in relation to each other must be adjusted (timed) in such a manner that the actions of these parts repeat themselves regularly at certain fixed time intervals.

  • Page 21: Timing Of Shuttle And Needle Bar In The Supernova

    - Timing of shuttle and needle bar in the SUPERNOVA. Adjustment - Height of the Needle Bar. Turn the balance wheel by hand toward you until the point of the shuttle is just at the center of the rising needle.
  • Page 22 a - about 1/16" Fig. 16 Fig. 17 the gauge so that it will not be misplaced. In the following, a description of the use of this gauge is given: Insertion of the TIMING GAUGE No. 10-5. Turn the balance wheel by hand and bring the needle bar to its highest position (Fig.
  • Page 23 False needle Fig. 18 False needle Fig. 19 Copyright -2004...
  • Page 24 Timing procedure. Bring the needle bar to its lowest position. In this position, the lower end of false needle should be just in line with the lower edge " L " of the prong of this gauge, as shown in Figs. 19 and 20. If an adjustment of the height of the needle bar is necessary, loosen slightly screw No.
  • Page 25 _ Point shuttle Fig. 21-a Needle eye in correct Needle eye in incorrect position position The point of the shuttle. This is especially necessary when the machine sews with two needles. In order to obtain the above mentioned condition, it is necessary that the needle bar clamp No.
  • Page 26 C85201 Fig. 22 Fig. 23 is too far away from the needle, loosen the screw " F " (Fig. 24) below the bed of the machine. Then, move the race body No. D 26330 with the carrier shaft No, C 26325 in (axial) direction until the shuttle comes as close as possible to the needle without touching it.
  • Page 27 D26330 Fig. 24 Adjustment - Centering the needle in relation to the race cover plate. The single needle " A " (Fig. 25) should pass exactly through the center of the slot in the shuttle race cap No. 21330. In the twin-needle machine, the correct position of the needle is that shown in Fig.
  • Page 28 The needle "A" is at equal distance from both edges " B " Fig. 25 Both needles "A" are at equal distanc es from edges " B " Fig. Copyright -2004...
  • Page 29 Insertion of the Timing Gauge No. 10-9 and of the Square-angled Bar E. (Fig. 27). Remove the presser foot and the needle plate. Remove the needle and the shuttle. Insert bar " E " (Fig. 27) of the gauge into the needle bar, following the same instructions as for the insertion of a needle.
  • Page 30 Insert the gauge No. 10-9 into the race body and attach it by means of the two knobs " H " and the two locating pins " G ". Timing procedure. If, by pushing down the needle bar by hand while the balance wheel Is held firmly, the lower end of the bar "...
  • Page 31 Important - Adjustment of the Shuttle Carrier Shaft in the SUPERNOVA. In the NECCHI SUPERNOVA machines, the oscillating crank shaft No. D 26306 is pinned to the carrier shaft No. C 26325 (Fig. 28). In these machines, therefore, the angular position of the shuttle carrier at one end of the carrier shaft in relation to the oscillating crank shaft D 26306 at the other end of this shaft remains always the same.
  • Page 32 ING GAUGE No. 10-5 in the following manner: Insert the gauge No. 10-5 as explained in the paragraph: "Timing of shuttle and needle bar in the SUPERNOVA". Bring the needle bar to its lowest position. In this position, the false needle, if correctly adjusted, will lie between the two timing lines "A"...
  • Page 33 required direction until the false needle lies between the two lines "A". Tighten screw No. 048050 GEB firmly and remove the gauge. Carry out the adjustments I, II, III, IV of the instruction: " Tim ing of shuttle and needle bar " (page 13). Now, sew with the machine.

  • Page 34: Timing Of Feed Dog And Needle Bar

    False needle pered pins No. 300160 SA. For reaming tapered holes use tapered reamer N. 3/0. After this operation, it is advisable to again perform the adjustments II, III, IV of the section " Timing of shuttle and needle bar ". If the machine does not sew properly, repeat operation No.
  • Page 35 Open the small cover " A " (Fig. 32). Loosen full screw " B " (without taking it away). Raise the top cover, holding it at the left end. When replacing the top cover it is necessary that the hook " C " (Fig.
  • Page 36 20026 048080GEB The timing of the feed dog and needle bar can be made with the help of the gauge 10-3 (Fig. 34). Insert the pin " B " of the gauge into the timing hole of the feed dog eccentric A 20026. Turn the flywheel slowly toward you until the gauge rests on the two side rims of the machine as shown in Fig.
  • Page 37 Fig. 34 Fig. 34-a - Ti ming the regulating shaft of the s titc h length regul ati ng k n o b ( F i g. 35 ) . Before starting, remove cams from machine (as explained previously), then swing cam disengaging lever entirely to the right as far as it will go, and proceed as follows: Copyright -2004...
  • Page 38 Loosen the screws " 8 " which hold the collar " 9 " to the shaft " A ". Do not loosen the two screws " 10 ". Turn the stitch length regulating knob counterclockwise to zero (0). D85506 5 Fig.
  • Page 39 Gripping the shaft " 13 " by hand, turn it counterclockwise until the pin " 1 " of the reverse plate is completely in the groove. In this position the shaft is blocked and cannot move any further. To check the above adjustment 3, proceed as follows: Slightly tighten the two screws "...
  • Page 40 The timing of this regulating shaft A/13 can also be performed with the aid of the gauge 10-6. Using timing gauge 10-6. Remove the automatic mechanism mounting plate and the right-hand cover. 20026 D85506 Fig. 36 Copyright -2004...
  • Page 41 Remove top cover. Disconnect pull-rod " A " from pin " B " (Fig. 37) by pushing it to the left with a screw-driver or, still better, with a finger. To facilitate this operation, remove first the cams from the ma- chine, then swing the cam disengaging lever entirely backward toward the machine arm.
  • Page 42 Loosen fully two screws " A " (Fig. 38). Pull cover away from machine. Loosen the two screws " 8 " which hold collar " 9 " (Fig. 35). Turn the stitch length regulating knob counterclockwise to ze- ro (0). Turn the flywheel until the eccentric 20026 of the upper shaft reaches the position as shown in Fig.
  • Page 43 Fig. 38 Copyright -2004...

  • Page 44: Fig. 39).

    - Timing of the automatic control eccentric A 85241 (Fig. 39). General Rules The automatic control eccentric controls the impulses of the cam axle, and has to be adjusted so that, while sewing a zig-zag automatically, the cam axle makes each of the single impulses when the needle bar is on its way upward.
  • Page 45 The timing of the eccentric A 85241 in relation to the needle bar can be made with the help of the gauge 10-7 by following this procedure: Remove the automatic mechanism mounting plate. Insert pin " B " of gauge 10-7 (Fig. 39) into the timing hole on eccentric A 85241.

  • Page 46: Timing Of The Zig-Zag Movement And The Movement Of The Needle Bar

    - Timing of the zig-zag movement and the movement of the needle bar. Remove the mounting plate for the Automatic device. Remove the zig-zag mechanism cover plate No. 85621. Replace the zig-zag mechanism cover plate with gauge 10-4 (Fig. 43). Set the machine for straight sewing by moving the needle positioning lever to the center of the gauge, and the zig-zag width to zero (completely to the left) (Fig.

  • Page 47: Copyright

    Fig. 43 occupies a position other than those described above, then loosen first the two screws " E " of the worm gear " F " (Fig, 45), hold the balance wheel firmly, thus keeping the needle bar in its highest position, and, by hand, turn the worm gear "...
  • Page 48 Timing procedure. Remove the mounting plate for the "Automatic" device. Replace the zig-zag mechanism cover plate with the plate " S " of gauge 10-4. Adjust the machine for straight sewing (see Fig. 40). Fig. 44 Turn the balance wheel slowly toward you and bring the eccentric "...
  • Page 49 Copyright -2004...
  • Page 50 If this condition is not met, proceed as follows: Loosen the screws " E " of the worm gear " F " (Fig. 45) on the upper shaft. Take gauge " U " and place it against the eccentric " A " (in or der to block this eccentric), then turn the balance wheel toward you until the needle bar is in its highest position (Fig.

  • Page 51: How To Dismantle The Upper Group Of The

    HOW TO DISMANTLE THE UPPER GROUP OF THE ZIG-ZAG MECHANISM (FIGS. 46 AND 47) Remove the top cover. Remove the mounting plate for the “Automatic " device. Remove the zig-zag mechanism cover plate and open the face plate of the machine. Remove the needle positioning rod "...
  • Page 52 g) Remove the feed lifting connecting rod No. A 26345 from the machine. To remove the nuts, use the special tool 20-1. Shift the eccentric No. 20026 towards the left until it rests on the gear. Turn the needle bar positioning lever assembly " 13 " toward the back and the lever assembly for zig-zag width control "...
  • Page 53 Now the lever assembly for zig-zag width control " 17 " is free to be dismantled in the following order: Remove the feed eccentric connecting rod No. D 85506 (see chapter, “Removing of Feed Eccentric Connecting Rod "). Turn the fly wheel (balance wheel) so that the fork of the oscillating rock shaft No.

  • Page 54: How To Assemble The Upper Group Of The Zig

    CAUTION: It is advisable, if not necessary, not to remove the vertical shaft "31". This will enable you to maintain the proper height of the needle positioning lever during the assembly of the machine. HOW TO ASSEMBLE THE UPPER GROUP OF THE ZIG-ZAG MECHANISM (FIG.
  • Page 55 Move the lever assembly " 17 " and the small link " 35 " so that the roller " 16 " enters the channel (groove) of lever assembly "17". Place and line up the washer " 14 " (see Figs. 46 and 50) on top of the hole in the upper arm, then insert pin "...
  • Page 56 The bearing bushing " E " of the lever assembly must be set down on washer " 14 " and retaining ring " 11B " without force. Adjust the clearance (open distance) between the underside of the eccentric " 22 " (see Fig. 50) and the channel of the lever assembly "...
  • Page 57 Fig. 52 bar support " 4 " by means of the pin " 5 " and the retaining washer " 8 ". Tighten screw " 6 " which holds pin " 5 " in the needle bar support " 4 ". Tighten temporarily screw " 29 " which holds the right-hand end of rod "...

  • Page 58: Zag Mechanism

    After having replaced this lever, check again the timing of the movement of the feed dog (see section, “Timing of Feed Dog and Needle Bar "). Reassemble the feed lifting connecting rod No. A26345. IMPORTANT ADJUSTMENTS TO BE MADE AFTER THE REASSEMBLY OF THE UPPER GROUP OF THE ZIG-ZAG MECHANISM Check the timing of the zig-zag movement in relation to the...

  • Page 59: Minor Adjustments In The Upper Group Of The Zig-Zag Mechanism

    MINOR ADJUSTMENTS IN THE UPPER GROUP OF THE ZIG-ZAG MECHANISM When the needle positioning lever no. A85662 is in the center notch and the zig-zag stitch lever handle No. 85620 is set at " O ", namely at the extreme left (after the cams have been removed from the machine), the needle must be in the center of the hole of the zig-zag stitch needle plate.
  • Page 60 048050GEB 2 6 2 4 0 ^ Fig. 53 If, after having turned the eccentric support of the gear No. C85664 clockwise as far as it will go, there is still too much play between the two gears, replace the worn out gears with new ones.
  • Page 61 035040F '85663 C85641 ^ ^ 8 5 6 85620 A85606 Fig. 54 In the case " b " proceed as follows (Fig. 54): Slightly loosen screw No. 035040 FG which holds the eccentric No. 85663 to the lever No. 85641. means of a screw driver, inserted into the notch of ec centric No.

  • Page 62: The Feed Dog

    THE FEED DOG The purpose of this part is to feed the fabric regularly for a certain distance at every stitch so that the space between one perforation of the fabric by the needle, and the next one, equals the desired length of stitch. A perfect feeding operation is of great importance for the final result of sewing.

  • Page 63: Nism

    I - Adjustment of any looseness in the feeding mechanism. Excessive looseness of parts that are connected with the feeding mechanism, such as the feed shaft, the feed dog support and the feed eccentric connecting rod, can be ascertained by setting the stitch length regulating lever for very short stitches.
  • Page 64 If necessary, adjust the feed dog as follows (Fig. 55): loosen screw No. 1 that fastens the crank No. 2 to the feed lifting shaft No. 3; ■—- adjust crank No. 2 until feed dog teeth are in the right position as described above;...
  • Page 65 Note: It is necessary to check if both conditions 1 and 2 are met. If not, adjust the feed dog, following this procedure: Fig. 56 Loosen screw No. 1 (Fig. 55) and adjvist the crank No. 2 as require ed; tighten the screw No. 1 firmly. Check again if both conditions 1 and 2 are met.

  • Page 66: Alignment Of Feed Dog In Relation To The Slots In The Needle Plate

    - Alignment of feed dog in relation to the slots in the needle plate. It is necessary to check whether the rows " C " of the feed dog (Fig. 57) are parallel with, and at the same distance from the edges of the slots in needle plate "...
  • Page 67 1= b The feed dog has completed its The feed dog starts its horizontal horizontal movement in the slot of movement in the slot of the needle the needle plate Fig. 59 Fig. 58 " G " until the rows of the feed dog are in the right position, namely at the same distance from both edges of the slot.

  • Page 68: Of The Presser Foot And The Teeth Of The Feed Dog

    - How to check the alignment between the underside of the presser foot and the teeth of the feed dog. To make the machine feed correctly and thus to obtain a perfect seam, it is necessary that the entire bottom face of the presser foot rests fully (flush) on all teeth of the feed dog.
  • Page 69 Repeat operations " a ", " b ", and " c '. If the requirement " d " is not yet met, proceed further as follows: Replace the old feed dog with a new one and repeat again opera tions " a ", " b " and " c ". Here is the procedure to follow in order to change the feed dog: Remove needle plate (Fig.

  • Page 70: Minor Adjustments Of The Feed Dog

    - Minor adjustment of the feed dog. In case the machine, after the above described adjustments have been carried through, does not yet feed correctly, check the following points: The pressure of the foot on the fabric is not correct. When adjust- ing the pressure of the foot, keep in mind that: Thick and heavy fabrics require a greater pressure than thin and light fabrics.

  • Page 71: Positioning Of Presser Bar And Presser Foot

    Fig. 61 while for the type of fabric in work, the tension of the lower thread must be kept constant, the pressure of the presser bar spring and the tension of the upper thread must be changed in accordance with the thickness of the type of fabric. - Positioning of presser bar and presser foot.

  • Page 72: Height Of Presser Foot

    Fig. 62 Tighten the aforementioned screw firmly, first making sure that the presser bar guide No, 85318 has not shifted upward or downward from its original position, since this would bring with it a change of the pressure and the vertical position of the presser foot.
  • Page 73 Fig. 64 Fig. 63 Fig. 65 The presser bar lever is partially raised (see Fig. 64). This is the intermediate (or embroidery) position. In this position, a white triangle in the presser bar lever lines up with a horizontal timing mark on the arm.

  • Page 74: Upper Thread Tension

    UPPER THREAD TENSION Correct adjustment of the upper thread tension is imperative for good sewing. To function properly, the tension discs A, B, C, D (see Fig. 66) must be kept very clean. It is not advisable to clean dirty tension discs quickly by simply drawing a rag between them.

  • Page 75: The Thread Take-Up Spring (Check Spring) Of The Upper Tension

    Fig. 66 1 - The thread take-up spring (check spring) of the upper tension. This check spring " E " (Fig. 66) serves two purposes, namely: To take up and hold the slack of the upper thread, given free by the descending thread take-up lever (No.
  • Page 76 When released the check spring must occupy the position as shown in Fig. 67, namely, when the presser foot is resting on the needle plate, the vertical distance between the loop of the check spring " E " and the lever edge of thread guide " A "...

  • Page 77: Positioning Of The Tension Mechanism In Relation To The Hole In The Arm

    - Positioning of the tension mechanism in relation to the hole in the arm. It is very important to check whether the position of the tension me- chanism in relation to the hole in the machine arm is correct. Here is the procedure to follow for this adjustment: Set the presser bar lever No.

  • Page 78: Tension Of The Lower Thread (Tension Of The Bobbin Case)

    D20176 D20172 20176 20181 Fig. 70 - Tension of the lower thread (tension of the bobbin case). The tension spring No. 20178 in the bobbin case No. D 20176 (see Fig. 70) must place the lower thread under maximum tension when the bobbin case tension spring screw No. 20179 is completely tightened.

  • Page 79: The Oscillating Shuttle

    THE OSCILLATING SHUTTLE 26337 20/95 21330 ‘26335 26339 26327 025030 FOBS 025130 FOB 20795 025030 DAB Fig. 71 02634 The shuttle No. 26327 (see Fig. 71) is set in motion by the shuttle carrier No. D 26340, with the intermediate aid of the shuttle carrier adjusting spring No.
  • Page 80 0,012' Fig. 72 vital parts of the stitch mechanism) frequently and thoroughly, and to remove all dirt, lint, and pieces of thread which may have accumulated in the machine. Remove also any residues (gummed oil) caused by the use of improper lubricant. The same care must be applied to the raceway in the race body, and to the race cover.
  • Page 81 The fastening screws No. 20195 somehow have become loose. Too much play between shuttle and shuttle carrier spring will cause excessive noise and will influence the timing of the oscillating shuttle. It is also advisable to check from time to time, whether the shuttle is still timed correctly.
  • Page 82 TO REMOVE THE FEED ECCENTRIC CONNECTING ROD NO. D 85506 AND THE CONNECTING RODS OF THE STITCH LENGTH REGULATING MECHANISM (FIGS. 74 AND 75) 20026 D85506 Fig. 74 Dismantle and remove from the machine the feed lifting con- necting rod No. A 26345 (to loosen the nut at the end of this rod use the special wrench No.
  • Page 83 Fig. 75 Unscrew fully the conical screw No. 58 at the lower end of this connecting rod. Loosen the screws No. 048080 GEB that fasten the feed eccen tric No. 20026 to the upper shaft. Move the eccentric No. 20026 (together with the connecting rod No.
  • Page 84 Disconnect spring No. 3 at its lower end (Figs. 74 and 75). By means of the tool, shown in Fig. 47, remove the snap ring " 2 " which is holding the pivot " C " of the stitch length lever " 4 " (Fig.
  • Page 85 20026 0,011" ^ 0,015 D85506 Fig. 76 Insert the longer end portion of the regulating shaft pin " 13 " into the proper hole in the rear side of the arm. Note. - While assembling the regulating shaft " 11 ", care must be taken that the pivot "...
  • Page 86 Fig. 77 Insert the pivot pin of stitch length regulating knob " 12 " into the hole in the arm so that the end of this pin is protruding slightly inside of the arm casting. Slip first onto the pin of the stitch length regulating knob, which protrudes inside of the arm, the flat washer "...
  • Page 87 HOW TO REASSEMBLE THE FEED ECCENTRIC ROD NO. D 85506 AND THE CONNECTING RODS OF THE STITCH LENGTH REGULATING MECHANISM (FIGS. 74 AND 75) Insert the reverse stitch plate "5 " (which is connected with the reverse stitch control button) on the bushing " 6 " which is fixed inside the casting of the arm and, at the same time, insert the reverse stitch control button into its proper hole in the arm, from the inside outwards.
  • Page 88 ing rod No. D 85506, along the upper shaft until the hole in the lower end of connecting rod " 1 ", hanging down on the connecting rod No. D 85506, slips onto the lower stud in the stitch regulator lever "...
  • Page 89 The reverse sewing button " R ", when pressed must not move at all. Two thicknesses of regular sewing material, when placed under the presser foot, must not move at all when the machine is ope- rated. In the following are given a few hints to remedy the inconveniences in case the stitch length regulating knob, or the regulating shaft are not properly adjusted: Zero mark in stitch length regulating knob does not coincide with...
  • Page 90 Press together stitch length regulating knob " 12 " and bushing " 9 " with a special pair of pliers (see Fig. 78). While pressing these parts together, tighten the two screws " 8 " and then two screws " 10 " which fasten the bushing " 9 " to the center pin of the stitch length regulating knob.
  • Page 91 If the zero sign of the stitch length regulating knob does not reach the mark on the machine arm, correct as follows: Remove right-hand (motor) cover. Disconnect lower end of spring " 3 " (Fig. 74) from machine arm to facilitate the adjusting procedure. Loosen the two screws "...
  • Page 92 041030 DA 035150GAN—^ 042090 GAB 85545' 85544 85589 Fig. 79 D8555 85589 Fig. 041030 042090 035150 85545 Conversely, when the knob No. 13 85559 is completely raised (see Fig. 80), there must be a space of about 3/64" between the push pin No.
  • Page 93 It is indispensable to make these adjustments when the machine is already completely assembled (no matter whether with or without the “Automatic "). If an adjustment has to be made, proceed as follows: Raise the knob No. D 85559 completely upward. Loosen the nut No.
  • Page 94 ADJUSTMENT OF THE ECCENTRIC NO. 85663 ON THE NEEDLE POSITIONING LEVER NO. C 85662 (FIG. 81) This adjustment is made in the factory during the assembly of the machine, and should not be repeated in case it should be necessary to remove this lever from the machine or assemble it again with the machine.
  • Page 95 C85662 03,5040 FG A 26240 85663 A85606 C85664 Fig. 81 The above adjustment, of course, is only valid if the vertical gear No. C 85664 (Fig. 81) is already in its proper place and the gear has not changed its correct position. ADJUSTMENT OF THE AXIAL PLAY (END PLAY) OF THE UPPER SHAFT The eccentric No.
  • Page 96 85279 A85241 Fig. 82 Take off top cover and open face plate of the machine. Pass Allen wrench (socket wrench) No. 20-5 (1/8") through the hole in the mounting plate for the automatic device (Fig. 82), and loosen slightly the screw No. 85279 on the eccentric No. A 85241. With one hand push the counterweight d ihe upper shaft toward the interior of the machine.
  • Page 97 ADJUSTMENT OF THE CONTACT FINGERS NO. A 26/1/23 AND NO. A 26/1/13 WHICH REGULATE THE POSITION OF THE NEEDLE AND THAT OF THE ZIG-ZAG WIDTH REGULATING LEVER Put the end "B" of the finger A 261 23 in contact with the gauge No.
  • Page 98 Put the end "G" of the A26/i/i3 finger A 26/1/13 in contact with the gauge No. 10-2 and put the rear end "L" of the finger in contact with the pin "H". The left branch of the fork "M" must then be in slight contact with the pin "N".
  • Page 99 A2 6/1/13 p(A26/l/24) D(A 26/3/25) 025040 FDB A 26/1/23 025040 FDB Fig. Tighten, without moving these parts, the screw 025040 FDB the small plate 26/1/24). Loosen the screw No. 025040 FDB which holds the small plate D (A 26/1/7), as indicated in Fig.
  • Page 100 ADJUSTMENT OF THE FEED REGULATING ROD (WHICH REGULATES THE « AUTOMATIC » LENGTH OF THE STITCH) NO. A 26/3/21 This adjustment and the one explained previously pertaining to the contact fingers No. A 26/1/13 and No. A 26/1/23, are very important in order to obtain perfect fancy stitching, and especially the Greek Key Stitch and the automatically made buttonholes.
  • Page 101 The needle positioning lever may be in any one of the three po sitions. Bring the cam connecting lever No. D (A 26/3/25) in working po sition, namely moves it entirely to the right toward the arm of the machine (Fig. 86). Move the design graduating knob to "...
  • Page 102 Let the machine run with the same speed as under (1), the material should not move backward with the same very slow, almost imperceptible motion as under test 1. If the conditions put forward under the first and second part of the above test, are not met, correct them in the following way: Loosen the nut "A"...
  • Page 103 Tighten the counter-nut " B ". Check again whether the requirements for the first and second parts of the adjustment are met. Some troubles and their remedies. The machine moves backward during the first part of the test (instead of forward). Solution: Loosen nut "...
  • Page 104 ADJUSTMENT OF THE NUMBER OF IMPULSES FOR EACH TURN OF THE CAM AXLE Fig H9 While the machine is operated, the cam axle (upon which the cams are placed) moves in short impulses. The cam axle makes a complete turn of 360 degrees during the completion of one design.
  • Page 105 Set the design graduating knob at " 4 ". Turn the balance wheel by hand (or let the machine run very slowly, holding the balance wheel back) and count the number of impulses which the cam axle receives during one full turn of 360 degrees.
  • Page 106 If the number of impulses is still under 135, repeat the adjustments " A ", " B ", " C " and " D ". If the number of impulses is more than 170 (for each turn of the cam axle), proceed as explained in the second test.
  • Page 107 Fig. 92 Turn the balance wheel by hand and count, one by one, the number of impulses made by the cam axle. Stop the machine when the cam axle has made a full turn of 360 degrees (when the mark on the gauge cam No. 10.2 is again in line with the mark on the mounting plate for the “Automatic ").
  • Page 108 ASSEMBLING THE PARTS UNDERNEATH THE MOUNTING PLATE NO. C(A26/1/1) OF THE AUTOMATIC DEVICE (FIG. 93) 400090BZ C(A26/3li) A 26/3/14- A26/3 C (A C(A26/1/1) 26/3/6) A26/3/i8 Copyright -2004...
  • Page 109 035080 26/3/12 FOB A Fig. 93 Fig. 93 shows how the various parts of the Automatic Device have to be assembled. In the following are indicated a few steps on how to assemble each single group. Copyright -2004...
  • Page 110 Preparation of assembling the group as shown in Fig. 94. Place the two brake shoes No. A26/3/4 inside of the lower pulling drums No. C(A26/3/l), shown in Fig. 93. Next, place the brake spring No. A26/3/5 (see Fig. 93) between the two brake-shoes (using a thin-nosed pair of pliers to bend the spring ends together).
  • Page 111 Preassembling of group Fig. 95. Place the thin washer No. A26/3/9 (Fig. 96) above the already prepared group, as shown in Fig. 94, so that the small hole " A " of this washer is exactly above the hole " A " of assembly Fig. 94. Place the washer on assembly Fig.
  • Page 112 26/3/9 Hole A Hole A A26J3/9 The washer No. A26/3/9 are seen above each other through the oblong hole " B " of the upper pulling drum No. C(A26/3/6) as indicated in Fig. 97. If the thin washer No. A26/3/9 should have moved, push it (with a pin) into a direction so that the two aforementioned holes are just above each other.
  • Page 113 How to adjust the group of Fig. 95 in the mounting plate No. C(A26/1/1) for the automatic device (see Fig. 98). Make certain that the two holes " A " (Fig. 96) coincide and are visible in the window " B " (see Fig. 97) of the upper pulling drum No.
  • Page 114 C (A 26/i/i) Fig. The most important points to be watched when assembling this group are as follows: Make certain that the stud " L " of the "Automatic" plate (see Fig. 98) has entered the hole " A " indicated in Fig. 94. This hole is the one farthest away from the end of the spring No.
  • Page 115 Before hooking on the two springs Nos. A26/3/18 and A26/3/12 the assembled automatic device, check with a finger whether the movement regulating ring No. A26/3/15 moves freely in each direction. Before inserting the retaining ring No. 400090BZ (Fig. 99), which keeps the entire lower portion of the Automatic device on the mounting plate No.
  • Page 116 Fig. 101 To replace the mounting plates proceed as follows: Turn the design graduating knob " A " between " 3 and 4 ". Turn the flywheel toward you so that the eccentric " B " with the larger part is facing backward (in this position the head of the screw "...
  • Page 117 that the two forks " F " and " G " are completely to the left. Bring the mounting plate above the machine arm so that the 4 holes in the plate are facing the corresponding screw holes in the machine.
  • Page 118 Fig. 102 (Fig. 102) and shift motor bracket until belt has just enough tension to pull the machine. Tighten the two bracket screws. Commutator of motor is dirty. Clean connector with cleaning fluid; then wipe it thoroughly dry. How to replace the motor brushes. The motor brushes are replaced in the following way: Loosen and remove the motor cover of the machine.
  • Page 119 Take the motor out of the machine, but do not pull out the motor cable from the hole in the bed plate (Fig. 103). Unscrew the two cups " C " and " D " (Fig. 104) which hold the brushes, and replace the old brushes with new ones. Replace the two cups "...
  • Page 120 m—c Motor turns tightly. Motor shaft is bent due to: Motor having been dropped, V-belt having been forced over the motor pulley after mo tor was mounted in place on the machine. Handle motor carefully to prevent above defect. Have defective motor repaired.
  • Page 121 Oiling of motor: use only high grade sewing machine oil. Apply one or two drops of this oil into each bearing oil hole every two or three months. Do not use vegetable oils. Before oiling, clean lint from oil holes with a pin. Motor runs, but does not pull machine.
  • Page 122 Motor smokes or emits a burning smell. Motor is overloaded due to excessive belt tension. Adjust belt tension as advised above. Motor is not oiled at all; wrong lubricant has been used; motor is over oiled; oil on commentator. Have motor thoroughly clean ed as suggested above.

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