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INSTRUCTION MANUAL

Semi-Industrial

Upholstery & Leather Craft

Sewing Machine

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Summary of Contents for Sewing Machine

Page 1: ...INSTRUCTION MANUAL Semi Industrial Upholstery Leather Craft Sewing Machine ...

Page 2: ...2 ...

Page 3: ...s Needles bobbins belts light bulbs needle plates feed dogs and shuttle hooks Electrical equipment except light bulbs is guaranteed for 2 years Warranty includes 1 year free labor Purchaser is responsible for shipping Date of Purchase ___________________________ Name of Purchaser _________________________ Name of Dealer____________________________ Dealer Address ...

Page 4: ...bin Thread Adjusting the Stitch Length Reverse Sewing Straight Stitch Zig Zag Sewing Adjusting the Tension 8 13 Adjusting the Shuttle Hook Removing the Hook Cleaning the Hook Replacing the Hook 14 Troubleshooting Motor Balance Wheel Run But Machine Will Not 15 Common Sewing Problems Skipped Stitches Steps to Eliminate Skipped Stitches Pressure Foot Pressure Needle Bar 16 17 Timing and Hook 18 23 S...

Page 5: ...ials including canvas upholstery materials and light weight leather It can also be used for home sewing where even feed on both the upper and lower threads are necessary The Semi Industrial Sewing Machine s feeding mechanism is composed of upper and lower feed dogs which are synchronized to feed the material either forward or reverse Both lifting and feeding feet alternately press the material tig...

Page 6: ...o hinges and tighten the two set screws on the bottom of the machine to secure the machine into the case The wiring block has two sockets attached One marked light the other marked motor Take the cord from the motor and plug it into the socket marked Motor Needles This machine uses one of the most common Industrial Needles They are System 135x17 in sizes that range from 16 to 22 Size 22 is the mos...

Page 7: ...ughly oiled prior to shipment It should be oiled frequently Oil in all areas where there is metal to metal working parts Refer to fig 2 5 Arrows indicate lubrication points USE ONLY SEWING MACHINE OIL ON YOUR MACHINE fig 2 fig 3 fig 4 fig 5 7 ...

Page 8: ... Wrap thread around the bobbin tensioner as shown 4 Release the clutch prior to winding bobbins 5 Run thread through the side of the bobbin and place bobbin on post Push post to the right and power machine to wind bobbin 8 If the clutch does not engage or disengage properly follow the instructions on how to reset the clutch 1 2 3 5 4 ...

Page 9: ...ig tail of bobbin tensioner bracket 4 Loop thread through ear holes 5 Through upper tension see separate diagram 6 Through take up lever then under end cover 7 Under the thread guide 8 Through the needle left to right 9 Through the center presser foot hole 9 6 Through take up lever then under end cover 1 2 3 4 5 6 7 8 9 Threading the Machine ...

Page 10: ... delivery eye Fig 3 To Insert Bobbin Case Into The Machine Raise the needle bar and take up lever both to their highest point Open the slide plate Hold the bobbin case by the latch and place it on the center post with the bobbin case finger in the notch at the top of the shuttle Release the latch and press the bobbin case into the shuttle until the latch catches on the center post with a click Per...

Page 11: ... the lower thread bobbin thread 3 Then pull up needle thread and at the same time the lower thread will be pulled up through stitch hole in needle plate 4 Both ends of thread must be drawn under and to the rear of presser foot about 6 inches Always turn the top of the balance wheel of the machine toward you to reduce the possibility of a thread jam in the lower mechanism Never operate the machine ...

Page 12: ...ll the way to the bottom of the slot in the stitch length plate 2 Hold the lever there until reverse sewing is completed 3 Then return the lever to the forward position Straight Sewing and ZigZag Sewing For straight sewing set the zigzag width control lever at 0 For zigzag sewing make sure the presser foot is for zigzag use Zigzag stitch is controlled by the zigzag width control lever on the front...

Page 13: ...en the upper thread tension is too loose or the bobbin tension too tight the upper thread will lay flat along the bottom of the material Fig 33 C The tension should be adjusted gradually until the desired tension is obtained Adjusting Bobbin Thread Tension 1 The bobbin thread tension on your machine is correctly adjusted before leaving the factory Therefore it is seldom necessary to alter the bobb...

Page 14: ...hest point 2 Remove the bobbin and bobbin case 3 Turn clasp A outward 4 Turn clasp B outward 5 Remove the retaining ring C and hook D by grasping the axle of the hook 6 Carefully remove all accumulated lint and thread from the retaining ring hook and race body 7 Replace the hook D into the race body with the axle facing out forming a perfect circle with the driver fig 9 14 Shuttle Driver ...

Page 15: ... the balance wheel onto the shaft of the machine 2 Position the clutch washer at the end of the balance wheel with the two inner prongs point out 3 Make note of the position of the outer prongs on the clutch washer It may have to be changed later 4 Screw in the hand clutch screw tightly 5 Screw in the stop screw 6 Turn the hand clutch counterclockwise as far as it will go the screw will hit a stop...

Page 16: ... entire bobbin of the lower thread The two threads are then interlocked and a stitch is formed The needle continues to rise and the take up arm rises to pull the excess thread up from the bottom of the fabric The thread then comes up out of the cloth Skipped Stitches If the machine is skipping stitches then the hook is not catching the thread each time it makes its pass The cause of this is usuall...

Page 17: ...e to increase the pressure thus compressing the spring underneath 3 Reset the Needle Bar If the machine still skips stitches it is likely the needle bar is too high or too low Needle bar height is checked by observing the distance between the eye of the needle to the hook point See Fig 11 12 The preferred technique is to measure the distance between the top of the needle eye and the hook point whe...

Page 18: ...nce of the hook and the needle is to remove the presser foot needle plate and the feed dog This is easiest to accomplish with a well lit area Turn the balance wheel until you see the shuttle hook swing back past the needle then forward past the needle As you look through the feed dog opening from the top of the machine the hook should be as close as possible to the needle on its right side but sho...

Page 19: ...hem by looking at the needle and hook from the bottom Again they should be as close as possible without causing needle deflection See fig 14 The gap between the needle and the hook should be zero the hook must be moved to the left to close the gap If the needle is being de flected by the hook then move the hook to the right fig 14 Hook should just brush by on right side of needle when facing machi...

Page 20: ...ng In some situations the rotation may be part of the problem In order to check the rotation remove the hook and bobbin case Insert the race cover and clip it into place Rotate the balance wheel until the needle enters the shuttle and view from below to see if the needle is in the center of the triangu lar opening It if is not adjust the rotation of the shuttle in the clamp to make the clearance f...

Page 21: ... hook as close to the needle as possible without touching it move the shaft Holding the correct position of the shaft carefully move the collar to the far right leaving no lateral play then tighten its screw Holding the shuttle right loosen the screw on the compressible clamp and move the clamp to the far left position Be sure that the clamp gap is aligned with the reference mark that was made Whe...

Page 22: ...r shaft 5 Check the Hook Timing If the performance of the machine is still off after adjusting the left and right position of the hook check the hook rotation The hook is driven by the shuttle driver The driver must be repositioned on the lower shaft in order to change the rotation of the hook There are two set screws that secure the driver to the lower shaft Rotating the driver on its shaft is do...

Page 23: ...oint is set too close to the needle If this happens it will result in all skipped stitches On the opposite end if the hook is too far from the needle by the time the hook point gets to the loop the thread is too high to be caught When properly timed the hook will catch the loop consistently See fig 16B fig 16A fig 16B 23 Bottom Dead Center Timing is correct when the point of the hook is just in li...

Page 24: ...GROUP 1 CONSTRUCTION EXTERNAL GROUP 24 ...

Page 25: ...T SCREW 2 1 13 WO48 FACE PLATE 1 14 CO97 FACE PLATE SET SCREW 15 W125 STITCH LENGTH PLATE 1 16 AO75 STITCH LENGTH PLATE SET SCREW 1 17 BO10 BOBBIN WINDER SET SCREW 2 18 WO32 NEEDLE PLATE 1 19 AO52 NEEDLE PLATE SET SCREW 2 20 AO48 B SHUTTLE RACE SLIDE 1 21 WO29 THREAD GUIDE 1 22 W184 1 DIAL TENSION ASSEMBLY 1 23 WO30 BOBBIN WINDER 1 24 WO25 CRANK ROD BEARING SET BASE 1 25 WO25 1 CRANK ROD BEARING S...

Page 26: ...GROUP 2 SEWING TRANSMISSION GROUP fi 26 10 11 ...

Page 27: ... 15 A042 NEEDLE BAR CONNECTING STUD 1 16 A092 NEEDLE SET SCREW 1 17 A031 PRESSER REGULATING THUMB SCREW 1 18 W010 PRESSER REGULATING THUMB SET SCREW 1 19 A032 PRESSER BAR SPRING 1 20 B016 NEEDLE BAR SUPPORT 1 21 A021 NEEDLE BAR CONNECTING JOINT SET SCREW 1 22 W015 ZIGZAG CONNECTING ROD 1 23 B099 NEEDLE BAR CONNECTING JOINT PIN 1 24 W066 NEEDLE BAR 1 25 W067 NEEDLE THREAD GUIDE 1 26 W008 NEEDLE 1 2...

Page 28: ...GROUP 3 SHUTTLE TRANSMISSION GROUP 28 19 20 20 ...

Page 29: ... CRANK SET SCREW 1 8 B179 OSCILLATING SHAFT CRANK WITH SLIDE BLOCK 1 9 B177 LOWER SHAFT COLLAR 2 10 B155 SHUTTLE RACE CLAMP 1 11 A 084 SHUTTLE RACE GUIDE SHAFT 1 12 B153 SHUTTLE RACE GUIDE SHAFT SET SCREW 1 13 B170 SHUTTLE RACE GUIDE SHAFT COMPLETE 1 14 B172 LOWER SHAFT 1 15 W172 SHUTTLE DRIVER 1 16 D099 SHUTTLE HOOK 1 17 A107 BOBBIN 1 18 D100 BOBBIN CASE ASSEMBLY 1 19 B139 2 CRANK CONNECTING ROD ...

Page 30: ...GROUP 4 FEED TRANSMISSION GROUP 30 21 ...

Page 31: ...ROD 1 11 A023 FEED ROCK SHAFT CENTER SCREW FEED LIFTING ROCK SHAFT SCREW NUT 2 2 12 W046 DRIVING CRANK 1 13 A071B FEED ROCK SHAFT CRANK 1 14 A071A FEED ROCK SHAFT 15 A076 FEED BAR CENTER SCREW NUT 2 16 A075 FEED BAR 1 17 W011 FEED DOG 1 18 A078 FEED DOG SCREW 2 19 W046 1 DRIVING CRANK GUIDE NUT 1 20 A061 DRIVING CRANK GUIDE SCREW 1 21 A072 FEED LIFTING ROCK SHAFT 1 22 A073 FEED LIFTING ROCK SHAFT ...

Page 32: ...GROUP 5 DRIVING REVERSING MECHANISM GROUP 32 ...

Page 33: ... PLATE 1 22 W041 1 END PLATE SET SCREW 2 23 W014 OUTSIDE PRESSER FOOT BRACKET LIMITER 1 24 C097 BRACKET LIMITER SET SCREW 2 25 W036 PRESSER BAR FEED ROD 1 26 W024 1 PRESSER BAR ACTUATOR SPACER 1 27 W022 END PLATE BEARING SET PLATE 1 28 W041 2 RIVET 3 29 W021 BEARING BRACKET BUSHING 2 30 W023 LIFT CRANK ROD BEARING BRACKET PLATE 2 31 W052 ROCKER END SET RING 1 32 W052 1 ROCKER SET RING SET SCREW 2 ...

Page 34: ...GROUP 6 ELECTRIC POWER DYNAMIC TRANSMISSION fi 34 ...

Page 35: ...LE PULLEY SHAFT 1 12 W061 3 IDLE PULLEY 1 13 W061 4 IDLE PULLEY BEARING 1 14 W061 6 IDLE PULLEY LOCK WASHER 1 15 W061 2 IDLE PULLEY SET NUT 1 16 W059 PULLEY BRACKET 1 17 LT 2M 4 MOTOR BRACKET SET WASHER 1 18 LT 2M 3 MOTOR BRACKET SET LOCK WASHER 1 19 LT 2M 2 MOTOR BRACKET SET SCREW 1 20 W050 BELT COVER 1 21 A092 BELT COVER SET SCREW 2 22 W049 MOTOR BASE REAR COVER 1 23 W049 1 MOTOR BASE SET SCREW ...

Page 36: ... Push the pins back to their original position WHEN THE MACHINE RUNS HEAVILY If the machine runs sluggishly after standing idle for some time apply a drop of kerosene in place of oil Run the machine rapidly to clean Then oil the machine WHEN THE MACHINE RUNS HEAVILY FOR OTHER REASONS a The motor belt is too tight b Bobbin winder is not released c Thread is caught in the shuttle race d Machine is l...

Page 37: ...ring e 1 Adjust the bobbin winder thread guide 2 Adjust the upper thread tension 3 Use thread of same size as the needle thread 4 Use finer needle and thread which is suitable for the fabric 5 Change the needle 6 Change the thread IF THE MATERIAL PUCKERS a The needle thread tension is too tight b The needle and the bobbin thread are too tight for the fabric c Too much pressure applied to the press...

Page 38: ...d to the tension discs of the bobbin winder thread guide IF THE NEEDLE THREAD BREAKS a The needle is inserted incorrectly b The needle is not threaded correctly c The upper tension is too tight d Knots in thread e The needle is too fine for thread f The needle is bent or its point is broken g The stitch hole in the needle plate is rough or sharp h Poor quality thread a Correct the insertion of nee...

Page 39: ...wing heavy material a Correct the insertion of needle b Change needle c It must be threaded from left to right d Change size of needle e Change needle to a heavier one f Check pressure IF THE NEEDLE BREAKS a The needle is bent b The fabric is pulled from behind while sewing a Change to new needle b Do not interfere with feeding action of machine NOTE To avoid breaking of needle firmly tighten scre...

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