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Tapping to the right gives on earlier hook timing, and to the left gives later hook timing. Wxcept the above case, to adjust in changing gear condition between hook driving gear and hook shaft gear . Securely tinghten the two screws for hook driving gear after finishing adjustment. 2.Normally, the clearance between hook point and scarf of needle is 0.02~0.1mm a.Loosen screw ; b.Move the hook saddle right or left until the hook point is as close to needle as possible, but without striking it; c.Tighten the two screws; d.Before adjustment, please be sure that the needle doesn't bend. 13 14 12 „” ./: (495) 989-22-9717.Adjusting the height of needle bar(Fig.15) 15 17 16 Norm ally, the clearance between top of the eye of needle and hook point is 2.2mm. In case the needle bar is incorrectly set, loose the needle bar set screw and place the needle bar in correct position as required, and then tighten the screw . 18.Ajdusting the bobbin case opener(Fig.16) 1.Turn the hand wheel until the top of the opener is located at the distance from the needle plate; 2.In this position, adjust it so that the clearance between the inside edge of the opener and the top of the hook is about 0.3~0.8mm; 3.After adjustment, tighten the screw . 19.Adusting the height of presser foot(Fig.17) The distance between the surface of the needle plate (A) and the presser foot at stoped position is 19mm When step on the lifting pedal, the stop lever(C) will be released by the lifting lever(B). 1.To change the relative lift of the presser feet, loosen the screw at the above condition. 2.The height of lift of the presser feet is adjustable by moving the screw of presser bar lifting bracket. 3.Normally, the distance between presser bar position guide bracket and presser bar position guide is 7mm. Position of the vibrating presser foot to shift in left and right is to be adjusted by the screw for presser bar lifting bracket and the screw for presser bar position guide bracket. „” ./: (495) 989-22-9720.Adjusting the timing of vibrating presser foot(Fig.18) The amount of lift of the presser feet should be regulated according to the thickness of materials to be sewn. The feet should lift just enough to clear the materials. As a rule, the walking foot and presser foot should lift at the same height, but some grades of work may require that they lift an unequal height. To change the relative lift of the presser feet, loosen the screw (A) for lifting rock shaft crank and move the vibrating presser bar upward or downward as required, then tighten the screw (A). 21.Adjusting the presser foot movement amount(Fig.19) The lifting amount of presser foot and walking foot can be adjusted by the lifting bell carnk link screw stud .To decrease the movement in setting the stud at the upper position, and to increase the movement in setting the stad at the lower position, after setting, tighten the stud with nut . The clearance for the presser foot and walking foot are being adjusted at maximum, so that the clearance of them should be adjusted according to the materials to be sewn. The timing position for the presser feet should be regulated by Fig.18. 22.Adjusting the thread controller spring(Fig.20) 1.For more or less controller spring action on the thread, loosen the screw and turn the stop plate to increase or decrease the action. 2.Adjusting the tension of controller spring: loosen the nut and screw ,turn the spring stud screw leftward with a screwdriver to increase the tension, or turn the stud screw rightward to decrease the teasion, finally, tighten the screw . 19 20 18 „” ./: (495) 989-22-9723.Replacing the timing belt(Fig.21) 21 22 A.When the timing belt removed from the pulley for adjustment and/or replacing spare parts, it should be replaced by the following processes: 1.Turn the hand wheel to lift the thread take-up ...

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