Released 06/2010
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DECO 2000
1-45
1 1. A D J U S T M E N T A N D T I M I N G O F L O W E R L O O P E R
1) Timing the drive gibs
1.1. Rotate the handwheel by hand to transfer the needle to the upper needle bar. Stop at the point that
the retainer ring on the upper needle bar (moving upward) is just flush with the bottom of the needle
bar bushing.
1.2. Loosen the arm crank screw. Hold the arm crank assembly and move the lower looper arm out far
enough to remove the arm crank.
1.3. Bellow the handwheel remove the nut holding the arm crank drive gear.
1.4. Mark the position of the material feed drive gear.
1.5. Pull the arm crank drive to gear to disengage from the gearing and rotate to make the drive gibs point
vertically downward.
Reengage the arm crank drive gear to the gearing. Check that the material feed drive gear has not
moved.
1.6. Replace the nut on the gear stud and tighten.
1.7. Install the arm crank assembly on the shaft of the lower arm and make sure that the looper arm is
seated. Do not tighten. Proceed to the instructions for Timing the lever looper.
C A U T I O N ! Whenever the arm crank drive gear is disengaged, all other timings and adjustments must
be checked
2) Timing the lower looper
2.1. Bring the lower needle bar to 0,4 mm before the needle reaches its dwell position. The gripper
fingers should just close.
2.2. Loosen the arm crank screw. Hold the drive gibs in place and rotate the bottom looper to position its
tip at (12,7 mm Deco 2000 Pick Stitch ) (1 mm Deo 2000 Standard) from the slot in the gripper
fingers. Tighten the screw.
3) Align the lower hook tip
3.1. Bring the tip of the lower hook to the gripper fingers.
3.2. Align the tip of the hook at 2 — 3 mm below the top edge of the gripper fingers (screw at the end of
looper arm). Tighten the screw.
E - STANDARD MACHINE ADJUSTMENT