To Adjust The Timing Of The Needle And The Feed Dog - Kenmore 16677 - Serger Sewing Machine Servicing Manual

TO ADJUSTTHETIMING OFTHE NEEDLE
AND THE FEED DOG
CORRECT SETTING:
WHEN THE TIP OF RIGHT NEEDLE IS AT 2 TO 4 MM ABOVE THE NEEDLE PLATE IN ITS DOWN-
WARD MOTION, AND PRESSER FOOT LOWERED, THE TOP OF THE FEED DOG TEETH SHOULD
BE LEVEL WITH THE TOP SURFACE OF NEEDLE PLATE AT THEIR REARMOST POSITION.
BEFORE ADJUSTMENT, CHECK IFTHE NEEDLE BAR HEIGHT AND THE FEED DOG HEIGHT ARE
CORRECT.
TO ADJUST:
1. SETTHE STITCH LENGTH DIAL AT "3" AND DIFFERENTIAL FEED DIAL AT" 1.0".
2. REMOVE THE BACK COVER UNIT.
3. RAISE THE PRESSER FOOT AND MOVE THE TIP OF RIGHT NEEDLE AT 3 MM ABOVE THE
NEEDLE PLATE IN ITS DOWNWARD MOTION BY TURNING THE HANDWHEEL.
4. LOWER THE PRESSER FOOT, AND LOOSE TWO SETSCREWS (A) ON MAIN FEED CAM, TWO
SETSCREWS (B) ON SUB FEED CAM, AND ADJUST THE POSITION OFTHE SUB FEED CAM
AND TIGHTEN SETSCREWS (B).
# TURN THE SUB FEED CAM TO THE DIRECTION (C) IF THE FEED DOG IS LOWER THAN THE
SURFACE OFTHE NEEDLE PLATE.
# TURNTHE SUB FEED CAM TOTHE DIRECTION (D) IFTHE FEED DOG IS HIGHER THAN
THE SURFACE OFTHE NEEDLE PLATE.
NOTE: WHEN TURNING THE SUB FEED CAM, PUSH THE SUB FEED CAM TO THE MAIN FEED
CAM LIGHTLY.
5. SETTHE MAIN FEED CAM TO KEEP THE CLEARANCE BETWEEN THE BUSHING AND MAIN
FEED CAM TO ABOUT 1 MM, AND TIGHTEN TWO SETSCREWS (A).
ATTACH THE BACK COVER UNIT.
THE TOP SURFACE OF FEED DOG
TH E TOP '_ _J
OF NEEDLE PLATE 2 ~ 4 MM
DIRECTION (C)
f!THE END OF FEED
MOVEMENT
_{ "_ THE CLEARANCE BETWEEN
THE BUSHING AND FEED CAM
SHOULD BE ABOUT 1 MM
SETSCREW (A)
BUSHING
_ MAIN FEED CAM
DIREC_ SETSCREW (B)
11
00. L GO5 L]
2MM