Seiko TH-2B Instruction Manual Download | Manualshive

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From the library of: Superior Sewing Machine & Supply LLC

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Summary of Contents for TH-2B

Page 1: ...Operating Instructiona T H 2 B T H 6 B T H 7 B T H 8 B SEIKO SEWING MACHINE CO From the library of Superior Sewing Machine Supply LLC ...

Page 2: ...nts g A Adjusting needle position against needle hole of feed dog 7B 8B Types 9 B Adjusting the height of feed dog 10 C Adjustment for timing of feed dog rise 10 D Adjusting the forward and backward position of needle bar frame 10 E Timing of needle and hook Positioning between the upper side of needle eye 11 Adjusting the height of needle bar 11 Adjusting the position of the tip of hook 11 Adjust...

Page 3: ...anged by the models and applications DD X 1 BY X 1 forTH 2B 8B Alternating pressers 7B Flat presser 6B Roller or flat presser 2B Alternating pressers 20mm 10mm by lever 56 253inm x 656mm 180mm X 400mm Suitable for sewing of extra heavy materials such as shoeSf bagSt leathert sproting goods and thick fabrics From the library of Superior Sewing Machine Supply LLC ...

Page 4: ...1 Lubrication Lubrication all points indicated by arrows in figures 1 From the library of Superior Sewing Machine Supply LLC ...

Page 5: ... tighten the set sorew l securely 3 Thread The needle thread should be used the left twisted thread only the bobbin thread can be used either left or right twisted To find out thread twist hold the thread as shown by illust ration and turn the thread over toward you between the thumb and forefinger of right hand and then left twisted thread will wind tighter strands and right twisted thread will u...

Page 6: ...bserve the hook position as shown figure and drop do the needle bar at lowest point then apring l and bobbin caseu and depress the snap spring and pull up the bobbin case outward and take the bobbin out of the bobbin case b 3 From the library of Superior Sewing Machine Supply LLC ...

Page 7: ...ead Pass the thread in the order numerically instructed in figures 1 Spool pin 2 Thread guide am 3 Needle teneion thread guide the clearance between two tension discs 4 Meedle thread tension thr d guide 5 Bobbin winding several timesj 6 Move the bobbin winding lever un U Winding length should be adjusted by the screw 7 and left rightward positioning of the lever 6 4 From the library of Superior Se...

Page 8: ...on sprffig_ g 9 Thread guide on face plate 11 Needle 10 Needle clamp Tension of bobbin thread and needle thread Balanced tension A When stitch tension is well balanced the bobbin thread IS enpged with the needle thread at the center of given material thickness as shown by fig A B Tight needle of loose bobbin thread tension B Pig B shows unbalanced tension tight needle thread or loose bobbin thread...

Page 9: ... S Adjusting hoBbin thread tension By loosening set screw l and tension regulating screw 1 The set screw l should exactly be tightened after the bobbin thread tension was adjusted By turning the tension regulating screw clockwise thread tension increases and by turning the tension regulating screw counter clockwise thread tension decreases 6 From the library of Superior Sewing Machine Supply LLC ...

Page 10: ... clockwise feed length deoreasea Md by turning the knurling nut 2 3 oounte increases The knurling nut 2 ias determined desired stitch length ikO A Note When upward downward movemei of the feed regulating lever loosened the feed adjusting screw 4 should be tightened 10 Determination of positioning for stitch length at forward and backward amount Equivalent stitch length at forward and backward can ...

Page 11: ...d should be adjusted so as to Sdo b Adjustment Pull up the presser bar lifter 3 the clearance should be made over 3mm between tip of the tension releasing plate 4 and tension disc 5 and tighten the screws 2 on the tension releasing plate ii From the library of Superior Sewing Machine Supply LLC ...

Page 12: ...f the above description rig 2 Fig 1 ri 13 Adjusting on the each points x f7 B A Adjusting needle position against needle hole of feed dog Ledle hoild he positioned feed dog and moved together the amount out of feed shaft PP r acrew 3 and needle screw 3 Needle dorpping point is to be set at the center of needle hole of the feed dog Note Peed shaf t upper connector AU4 should be fixed by the screw 3...

Page 13: ...fe C Adjuatment for timing of feed dog rise I r L LIS a ZISlr and vihfating foot hf og position AdjustSenI a lipper lower f d wo aorews l showf 116 5 85 hoiltiin forward and backward position of needle bar frame ri T s rHise c 16 17m 0 L Ot Adjustment of the clearance between presser bar and needle bar is to be made by the acrew l 1 0 O imlQ 2 From the library of Superior Sewing Machine Supply LLC...

Page 14: ...e and the tip of the hook should be 2 5mm 3mm Adjusting the height of needle bar Loosen the screw of needle bar connecting 3tud 2 by wrench which inserts to the hole l of arm and adjust the needle bar 3 upward and downward Adjusting the position of the tip of hook Loosen the screw 4 of the shaft crank by spanner then determine the forward or backward high or low speed of the tip of hook Tighten th...

Page 15: ...2 needle bar rock frame hinge stud large 6 Se stud large 6 to moving the needle bar rock frame leftward of thT the balance wheel determines smooth position of feed dog needle and center of the needle hole position tighten the set screw l of r fclie needle bar Inn hin stud small 4 to slightly the needle bar bar rock frame position bracket 8 needle bar rook frame hinge stud large 6 to the aide wh i ...

Page 16: ...ily or slowly As for 2B Type adjusting feed dog and outer presser foot to set at same point on the upper face of the needle plate b For the setting of inside presser foot and outside presser foot e iuivalently the lifting eccentric connection crank pinch acrew 3 io to be adjusted Ajustment should be made by the materials being sewn c Up down moving amount of inside presser foot and outside presser...

Page 17: ...ghest point 2 POSITION OF FEEDING CAM 28063 STANDARD When swaying the stitch length regulating lever 28l6i up and down at the point where the point of hook reaches Imin this side of the needle the feed dog and the needle should be still HOW TO ADJUST 7B and 8B type Turn the feed cam ff28063 until the lower edge of the second screw in rotating direction aligns with the upper edge of the hole A on t...

Page 18: ...ttle driver at the needle is its lowest point 30 S e POSITION OF SHUTTLE HOOK x Turn the handwheel until the shuttle driver 28 h51 reaches at extreme left side At this point when contacting C part of the hook with B part of the driver the point of the shuttle hooktD should be at 1mm from the edge of the shuttle race E For adjustment loosen the screw 2810it for Cylinder type 28805 for Flat bed type...

Page 19: ... 7 4 t 6B Zb CH RF V i Ji w From the library of Superior Sewing Machine Supply LLC ...

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