Janome HF2022 Service Manual page 5

CONDITION
5. NEEDLE
4. THE FABRIC MOVES
BREAKS
5. FABRIC IN BEING PULLED
6. NOISY 1. BACKLASH BETWEEN
OPERATION
2. LOWER SHAFT GEAR IS
3. INAPPROPRIATE BELT
4. UPPER SHAFT GEAR IS
5. NOT ENOUGH OIL.
7.DEFORMATION 1. INAPPROPRIATE ZIGZAG
PATTERN
2. INAPPROPRIATE
3. UPPER THREAD TENSION
4. INAPPROPRIATE FEED
WHAT TO DO WHEN
CAUSE
WHILE THE NEEDLE IS
PIERCING IT, OR THE
NEEDLE ZIGZAGS WHILE
IN FABRIC.
TOO STRONGLY WHILE
SEWING.
SHUTTLE HOOK GEAR
AND LOWER SHAFT GEAR
IS TOO GREAT.
LOOSE.
TESION.
LOOSE.
SYNCHRONIZATION.
DISENGAGEMENT OF AM
FOLLOWER.
IS TOO STRONG.
BALANCE.
HOW TO FIX
SEE MECHANICAL
ADJUSTMENT "NEEDLE SWING".
GUIDE THE FABRIC GENTLY
WHILE SEWING.
SEE MECHANICAL
ADJUSTMENT "CLEARANCE
BETWEEN NEEDLE AND HOOK
(NO.2)".
ELIMINATE THE LOOSENESS.
SEE MECHANICAL
ADJUSTMENT "MOTOR BELT
TENSION".
ELIMINATE THE LOOSENESS.
OIL ALL MOVING PARTS.
SEE MECHANICAL
ADJUSTMENT "NEEDLE SWING".
SEE MECANICAL ADJUSTMENT
"DISENGAGEMENT OF CAM
FOLLOWER".
ADJUST UPPER THREAD
TENSION CORRECTLY.
SEE MECHANICAL
ADJUSTMENT "FEED BALANCE
ON STRECH STITCH".
3
REFERENCE
P.10
P.14
P.24
P.10
P.20 - P.23
P.7
P.17