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3. STANDARD ADJUSTMENT
(1) Height and inclination of the feed dog
Standard Adjustment
Standard Adjustment
A B
Standard height : 1.2 mm : LZ-2290A-SS,
LZ-229A-DS, LZ-2290A-SR
: 1.4 mm : LZ-2290A-SU, LZ-2290A-DU
Inclination : The feed dog should be almost leveled
when the top surface of the ascending feed
dog is flush with the top surface of the
throat plate. (A-SS, A-DS, A-SR)
Reference for the height and inclination of the
feed dog
™ When the respective marker dots are
leveled, the height is 1.2 mm and the
inclination is leveled. (A-SS, A-DS, A-SR)
Timing mark J
engraved on
face plate
Feed rocker
cam
Feed
rocker rod
Alignment of
timing marks
Timing mark I
engraved on
face plate
Marker line
engraved on
thread take-
up
1.2 mm
Throat plate
Feed dog
Hole for
screwdriver
Top suface of
throat plate
Comes down.
1.2 mm
LeveledLeveled
Operator’s
side
Position of marker dot
(Inclination)
Position of marker dot
(Height)
1
2
3
A
(2) Adjusting the feed timing
1) Adjusting the feed timing (Excluding A-SR)
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