Released 06/2010
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DECO 2000
1-37
7. A D J U S T M E N T A N D T I M I N G O F T H R E A D T E N S I O N F I N G E R
1) Set forward position
1.1.
Remove both throat plates.
1.2.
Bring the tension finger to its most forward position (forward operator).
1.3.
Loosen the support block pivot screw.
Move the pivot to position the nose of finger at 4,8 to 6,4 mm from the center of the needle.
Tighten the screw.
2) Timing the tension finger
2.1.
Bring the lower needle bar to the point when the gripper fingers just open.
2.2.
Loosen two screws holding the bevel gear on the main cam shaft.
2.3.
Rotate the other bevel gear to move the tension finger to its rear position.
Tighten the screws on the bevel gear.
3) Clearance from the needle
3.1.
Remove both throat plates.
3.2.
Rotate the handwheel to move the tension finger through a complete cycle.
3.3.
Loosen the screw clamping the eccentric stud. Rotate the eccentric stud to adjust for clearance on
the return stroke between the finger and the needle 0,8 mm.
Tighten the screw.
4) Adjust the stitch tension
4.1.
First set the tension spring by one screw for no tension with the tension finger at the rear position
(away from the operator).
4.2.
For tighter stitches adjust for more tension on the tension spring
N O T E : Adjust the support block up or down so that the tension finger moves through the complete cycle
without any binding.
E - STANDARD MACHINE ADJUSTMENT