KANSAI SPECIAL DFB-1012PS - Timing and Angle Procedures; Needle Bar and Looper Timing; Rear Puller Timing

4. Needle bar and looper timing
Synchronize the timing between the looper and needle.
When
the timing is proper, the looper passes the same
route both in normal and reverse rotations.
5. Looper setting angle
Set loopers so that looper center and needle center
are on a center line.
6. Rear puller timing
Adjust rear puller timing so that the center of
puller driving eccentric set screws meets the center
of crankshaft when the need bar is at its lowest
position.
Note that puller roller reaches its extreme end
when needle just enters the needle plate hole.
Fig. 6
Front view
Fig. 7
Normal rotation
Looper end
Slide view
Reverse rotation
Set screw
Puller driving eccentric
From the library of: Diamond Needle Corp