ZOJE ZJ2842-BD Operation Manual
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ZOJE ZJ2842-BD Operation Manual

Needle lockstitch sewing machine
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Summary of Contents for ZOJE ZJ2842-BD

  • Page 3 NOTES ONSAFETY CAUTION Environmental Requirements The ambient temperature should be Use the sewing maching in an area which free from sources of strong electrical within the range of 5 to 35 during noise such as high-frequency welders. use. Temperatures which are lower or Sources of strong electrical noise may higher than this may cause problems with cause prob-lems with correct operation.

  • Page 5: Safety Instructions

    SAFETY INSTRUCTIONS Safety indications end their meanings This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe operation of this machine and to prevent accidents and injury to yourself or other people.

  • Page 7: Maintenance And Inspection

    CAUTION Sewing This sewing machine should only be used Attach all safety devices before using the sewing machine. If the machine is used by operators who have received the without these devices attached. Injury may necessary training in safe use beforehand. result.
  • Page 8 The following warning lables appear on the sewing machine The following warning lables appear on the sewing machine Please follow the instructions on the labels at all times when using the machine. If the labels have Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read please contact your nearest dealer been removed or are difficult to read please contact your nearest dealer Moving parts may cause injury Operate with safety devices...
  • Page 12 CONTENTS 1. NAMES OF MAJOR PARTS 1. NAMES OF MAJOR PARTS 2. MACHINE SPECIFICATIONS 2. MACHINE SPECIFICATIONS 3. OPTINONAL PARTS 3. OPTINONAL PARTS 4. TABLE PROCESSING DIAGRAM 4. TABLE PROCESSING DIAGRAM 5. INSTALLATION 5. INSTALLATION 5-1.Installing the oil pan 5-1.Installing the oil pan 5-2.Installing the machine head 5-2.Installing the machine head 5-3.Installing the knee lifter assembly...
  • Page 13 8-1.Adjusting the thread tension 8-1.Adjusting the thread tension 8-2.Adjusting the presser foor pressure 8-2.Adjusting the presser foor pressure 9. CLEANING 9. CLEANING 10. STANDARD ADJUSTMENTS 10. STANDARD ADJUSTMENTS 10-1.Adjusting of the feed dog height 10-1.Adjusting of the feed dog height 10-3.Adjusting the thread tension spring 10-3.Adjusting the thread tension spring 10-4.Adjusting the needle and rotary hook timing...
  • Page 14 Face plate Face plate Bobbin winder Bobbin winder Machine pully Machine pully Belt cover Belt cover Reverse Stitching lever Reverse Stitching lever Sftitch length dial Sftitch length dial Needle plate Needle plate Thread pillar Thread pillar Finger guard Finger guard Thread take-up cover Thread take-up cover...
  • Page 18 The following types of rotary hook are The following types of rotary hook are available. Select whichever one is ayitable available. Select whichever one is ayitable for your application. (The following part for your application. (The following part codes are assigned for the rotary hooks in codes are assigned for the rotary hooks in boxes.) boxes.)
  • Page 19 The following types of upper thread tension assembly are available for use with deifferent thread take-up The following types of upper thread tension assembly are available for use with deifferent thread take-up spring types and different thread tension spring strengths. spring types and different thread tension spring strengths.
  • Page 20 15 0.1 15 0.1 59 35 28 4-R20 2-R10 +0.3 +0.3 80.6 +0.3 +0.3 2-R10 2 45 2 45 80.6 15.5 0.5 15.5 0.5 223 0.3 223 0.3 80.5 0.3 80.5 0.3 520.5 -0.3 -0.3 4-R10 30 30 (14) (181) 1200 * The top of the table should be 40mm in thickness and should be strong enough * The top of the table should be 40mm in thickness and should be strong enough...
  • Page 22 Contact your ZOJE dealer or a qualified electrician Contact your ZOJE dealer or a qualified electrician for any electrical work that mat need to be done. for any electrical work that mat need to be done.
  • Page 24 1. Insert the knee lifter complying bar 1. Insert the knee lifter complying bar 2. Insert the two hinges 2. Insert the two hinges into the holes in the into the holes in the machine bed. machine bed. 3. Clamp the hinges 3.
  • Page 25 2) Loosen rge nut 2) Loosen rge nut 3) Turn the screw 3) Turn the screw to adjust so that the amount to adjust so that the amount of play in the knee lifter of play in the knee lifter is approximately is approximately 2mm when the knee lifter plate...
  • Page 26 (1) Control box (1) Control box (2) bolts(5pcs) (2) bolts(5pcs) (3) Spring washers(5pcs) (3) Spring washers(5pcs) (4) Washers(5purchase) (4) Washers(5purchase) (5) Nut (5) Nut (6) Connecting rod (6) Connecting rod...
  • Page 27 (1) Power switch (1) Power switch (2) Screws(2pcs) (2) Screws(2pcs) (2 ) (2 ) (1) Operation panel (1) Operation panel (2) Screws(2pcs) (2) Screws(2pcs) (Use for tightening rear cover) (Use for tightening rear cover)
  • Page 29 Touching areas where high voltahes are pressent can result in severe injury. Contact your ZOJE dealer or a qualified electrician for any electrical work that may need to Contact your ZOJE dealer or a qualified electrician for any electrical work that may need to be done.
  • Page 30 (1) Repeat cable tie (1) Repeat cable tie (2) Wire clip (2) Wire clip Bind the cords in such a way that the Bind the cords in such a way that the connector does not get pulled out. connector does not get pulled out. All cords that come out from the All cords that come out from the control box should be secured to the...
  • Page 31 The sewing machine should always be lubricated and the oil supply replenshed before it is used for the fist time,and also after long periods of nn-use. fist time,and also after long periods of nn-use. Use only the lubricating oil(Nisseki Sewing Lube 10)spectified by ZOJE. Use only the lubricating oil(Nisseki Sewing Lube 10)spectified by ZOJE. (Minimum lubrication speciflcations)
  • Page 32 1. If the lubricating oil level drops below the bottom 1. If the lubricating oil level drops below the bottom reference line (2) of the oil gauge window (1) be sure reference line (2) of the oil gauge window (1) be sure to add more oil.
  • Page 33 1. Insert the power cord plug into the wall 1. Insert the power cord plug into the wall outlet,and then turn on the power switch. outlet,and then turn on the power switch. 2. Depress the treadle and check that the 2.
  • Page 34 1. Raise the needles 1. Raise the needles to the highest positions,and to the highest positions,and 1. Raise the needle 1. Raise the needle to this highest positions, to this highest positions, open the slide plates open the slide plates by moving them to the right by moving them to the right and open the slide plates...
  • Page 35 1. Turn the machine pulley to raise the 1. Turn the machine pulley to raise the needle needle to its highest position. to its highest position. 2. Insert the bobbin 2. Insert the bobbin into the rotate hook into the rotate hook so that the winding direction is as so that the winding direction is as shown in the illustration.
  • Page 36 1. Insert the bobbin 1. Insert the bobbin into the cap into the cap so that so that the winding direction is as shown in the the winding direction is as shown in the illustration. illustration. 2. Thread the thread by one of the following 2.
  • Page 37 Turn the machine pulley and raise the thread take-up laver before threading the upper thread.This will Turn the machine pulley and raise the thread take-up laver before threading the upper thread.This will make threading easier and it will prevent the thread from coming out at the sewing start. make threading easier and it will prevent the thread from coming out at the sewing start.
  • Page 38 [2842 [2842 2845 2845 2872 2872 2875] 2875] [2842 [2842 2845 2845 2872 2872 2875] 2875] Turn the stitch length dial Turn the stitch length dial clockwise or clockwise or counterclockwise that the desired stitch counterclockwise that the desired stitch length is at the uppermost position on the length is at the uppermost position on the dial.
  • Page 39 To stop operation of the right needle bar: To stop operation of the right needle bar: Move the stop lever Move the stop lever to the to the R position. R position. Needle stop Needle stop To resume twin-needle sewing: To resume twin-needle sewing: Press the push lever Press the push lever...
  • Page 40 1. While holding the two upper threads with 1. While holding the two upper threads with your fingers, turn the machine pulley by your fingers, turn the machine pulley by hand toward you until the lower threads hand toward you until the lower threads come out onto the feed dog.
  • Page 41 Good even stitches Good even stitches Upper thread tension too strong or lower thread tension too weak. Upper thread tension too strong or lower thread tension too weak. Upper thread tension too weak or lower thread tension too strong. Upper thread tension too weak or lower thread tension too strong. Lower thread tension Lower thread tension The tension of the lower lower thread...
  • Page 42 More tension More tension Upper thread tension Upper thread tension Less tension Less tension After the lower thread tension has After the lower thread tension has adjusted, adjust the upper thread tension adjusted, adjust the upper thread tension so that a good, even stich is obtained. so that a good, even stich is obtained.
  • Page 43 The following cleaning operations should be carried out each day in order to maintain the performance of The following cleaning operations should be carried out each day in order to maintain the performance of this machine and to ensure a long service life. this machine and to ensure a long service life.
  • Page 44 (Lubrication) (Lubrication) Lubrication the sewing machine according to the procedure on page 18. Lubrication the sewing machine according to the procedure on page 18. 16 ) 16 ) 1. Check that the upper threads have been 1. Check that the upper threads have been threaded correctly.(Refer to page 16) threaded correctly.(Refer to page 16) 2.
  • Page 45 7mm ( 7mm ( 28 ) 28 ) 1. Loosen the nut 1. Loosen the nut and then loosen the presser foot and then loosen the presser foot adjustment screw . adjustment screw . 2. Open the face plate. 2. Open the face plate. 3.
  • Page 46 5-10m 5-10m 5-10mm operating range of thread take-up spring operating range of thread take-up spring The standard operating range for thread The standard operating range for thread take-up spring L and thread take-up take-up spring L and thread take-up spring R is 5-10mm for both springs. spring R is 5-10mm for both springs.
  • Page 47 1-3mm 1-3mm 0.05mm 0.05mm 1. Tilt back the machien head. 1. Tilt back the machien head. 2. Loosen screws 2. Loosen screws 3. Move the ratary hook base 3. Move the ratary hook base to the left or to the left or right so that the clearance between the needke right so that the clearance between the needke and the rotary hook tip...
  • Page 48 0.2mm 0.2mm 1. Loosen the setscrew 1. Loosen the setscrew and move the opener and move the opener to the left or right to adjust so that the to the left or right to adjust so that the clearnance between the rotary hook clearnance between the rotary hook and the and the...
  • Page 49 Stitch Length Stitch Length Needle bar height(H) Needle bar height(H) 7. Remove the needle plate. 7. Remove the needle plate. 8. Remove the feed dog. 8. Remove the feed dog. 9. Set the stitch length to either 2 (appros 2mm)or 3 (appros 3mm)on the scale, depending on the model and 9.
  • Page 50 Insert the needle clamp all the way into the needle bar. Insert the needle clamp all the way into the needle bar. Stitch Length Stitch Length Needle bar height(H) Needle bar height(H)
  • Page 51 1. Remove the needle plate. 1. Remove the needle plate. 2. Remove the feed dog. 2. Remove the feed dog. 3. Set the stitch length to eighter 2(approx. 2mm)on 3(approx. 3mm)or the sclale,depending on the model and 3. Set the stitch length to eighter 2(approx. 2mm)on 3(approx. 3mm)or the sclale,depending on the model and specifications of the machine.(refer to the table.) specifications of the machine.(refer to the table.) 4.
  • Page 53 Be careful not to touch your fingers or the lubrication amount check sheet against moving psrts such Be careful not to touch your fingers or the lubrication amount check sheet against moving psrts such as the rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary as the rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary hook, otherwise injury may result.
  • Page 54 1. Remove the needle. 1. Remove the needle. 2. Remove the belt cover. 2. Remove the belt cover. 3. Tilt the machine head back and remove 3. Tilt the machine head back and remove the timing belt the timing belt 4.
  • Page 55 After turning the lubrication adjustment screw to adjust the lubrication amount operate the machine for After turning the lubrication adjustment screw to adjust the lubrication amount operate the machine for 5-10 minutes before checking the lubrication amount. 5-10 minutes before checking the lubrication amount. 1.
  • Page 56 After turning the lubrication adjustment screw After turning the lubrication adjustment screw to adjust the lubrication amount operate the to adjust the lubrication amount operate the machine for 5-10 minutes before checking the machine for 5-10 minutes before checking the lubrication amount.
  • Page 57 Stop the machine while needle bar is at its Stop the machine while needle bar is at its highest position. highest position. Turn off the power switch. Turn off the power switch. Set the stitch length to Set the stitch length to 2 on the scale.
  • Page 58 Loosen thescrews Loosen thescrews and raise or lower and raise or lower the Stopper the Stopper until the clearance between the until the clearance between the tip of thread wiper tip of thread wiper and the presser bar and the presser bar is about 3mm whcn the thread wiper is about 3mm whcn the thread wiper returns...
  • Page 59 1. Remove the needles and raise the presser 1. Remove the needles and raise the presser foot. foot. 2. Loosen the screws 2. Loosen the screws , and then , and then remove the needle plate remove the needle plate 3.
  • Page 60 1. Turn the machine pulley by hand untill the 1. Turn the machine pulley by hand untill the ooedres are pulled the way in the arrow ooedres are pulled the way in the arrow direction. direction. 2. Lightly secure the moveble knife with 2.
  • Page 61 If the thread slips out of the needle hole after If the thread slips out of the needle hole after thread cutting, or if the tension disc remain open, thread cutting, or if the tension disc remain open, adjust as follows. adjust as follows.
  • Page 62 The synchronists of two elements which are used to detect the needle position. One of threse elements is The synchronists of two elements which are used to detect the needle position. One of threse elements is used to control the needle down signal and thread cutter signal. used to control the needle down signal and thread cutter signal.
  • Page 63 1. Turn the power on. 1. Turn the power on. 2. Press the treadle, and then release the treadle to 2. Press the treadle, and then release the treadle to neutral. neutral. 3. Make sure the gap from the top of the needle 3.
  • Page 64 1. Remove the needles. 1. Remove the needles. 2. Hold the thread trimming solenoid 2. Hold the thread trimming solenoid depressed depressed and turn the sewing machine pulley in its and turn the sewing machine pulley in its normall direction of rotation until the pulley normall direction of rotation until the pulley become hard to turn(the movable knife will become hard to turn(the movable knife will...
  • Page 65 1. Turn the machine pulley to move theneedle 1. Turn the machine pulley to move theneedle bar to its highest position. bar to its highest position. 2. Remove the needle 2. Remove the needle 3. Remove the slide plate 3. Remove the slide plate 4.
  • Page 66 Make the following adjustment when repla Make the following adjustment when repla -cing the current gauge with one wider,The feed -cing the current gauge with one wider,The feed dog cannot be installed if this adjust ment is not dog cannot be installed if this adjust ment is not made.
  • Page 67 4. Check the needle bar height. 4. Check the needle bar height. Turn the machine pulley to move the needle Turn the machine pulley to move the needle bar the its lowest position and adjust so that bar the its lowest position and adjust so that reference line is aligned as shown in the machine reference line is aligned as shown in the machine head.
  • Page 68 2 3mm 2 3mm 33-34 33-34 1-1.5mm 1-1.5mm 33-34 33-34 7. adjust the needle bar lift amount. 7. adjust the needle bar lift amount. 1) Set the stitch length to eight 2 ( approx.2 1) Set the stitch length to eight 2 ( approx.2 mm ) or 3 ( approx3ram ) on the scale,depending mm ) or 3 ( approx3ram ) on the scale,depending on the model and specifications of the machine.
  • Page 69 1. Turn the machine pulley to move the needle 1. Turn the machine pulley to move the needle bar to its highest position. bar to its highest position. 2. Remove the needle 2. Remove the needle 3. Remove the slide plates . 3.
  • Page 70 1.Insert the new rotary hook 1.Insert the new rotary hook into the into the mounting hole . mounting hole . 2.Install the needles . 2.Install the needles . 3.While refering to pages 34, adjust so 3.While refering to pages 34, adjust so that the rotary hook tip that the rotary hook tip is aligned with the...
  • Page 71 1.3mm 1.3mm 0.2mm 0.2mm 4. Return the machine head to its original 4. Return the machine head to its original position. position. 5. Install the opener . 5. Install the opener . 6. Install the feed dog . 6. Install the feed dog . 7.
  • Page 72 32 ) 32 ) 1. Openthefaceplate. 1. Openthefaceplate. 2. Loosen the screw 2. Loosen the screw 3. Loosen the screw 3. Loosen the screw and then remove the and then remove the upper thread tension assembly . upper thread tension assembly . 1.
  • Page 73 1. 1. 2. 2. 3. 3.
  • Page 74 Be sure to check the following before calling an authorized serwice station. Be sure to check the following before calling an authorized serwice station. Page Problem Where to check Where to check 1. Sewing machine pulley 1. Sewing machine pulley dosen't tum.
  • Page 75 4. 4. 5. 5. 20,21 20,21 6. 6. [2842,2872] [2842,2872]...
  • Page 76 Is the needle tip bent? Is the needle tip blunt? Is the needle tip bent? Is the needle tip blunt? 4. Skipped stitches 4. Skipped stitches If the needle tip is bent or broken,replace the needle. If the needle tip is bent or broken,replace the needle. Is the needle properly installed? Is the needle properly installed? If it is incorrect, install the needle correctly.

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