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(9) Adjustment of feed dog height and longitudinal movement (1 piece feed dog mechanism)
1) Height of main feed dog
The standard height is defined when the main feed dog
attains the highest level and the rear root section
of the main feed dog
coincides with the upper face of the throat plate of the main feed dog .
2) Adjustment of longitudinal movement of main feed dog
The maximum amount of feed of the main feed dog is 3.6 mm. (Standard: 3.2 mm)
When the main feed dog attains its maximum feeding amount, the standard positioning is secured when
Clearance "A" and Clearance "B" are equalized. Clearance "A" is defined as the distance from the feed
groove front section of the throat plate to the front section of the main feed dog iin position where the
main feed dog stays in the most advanced position. Clearance "B" is defined as the distance from the
feed groove rear section of the throat plate to the rear section of the main feed dog in position where
the main feed dog has attained the most retreated position. (A = B)
Coincidence
Height of main feed dog
A
B
Clearance of the main feed dog
in the most advanced position
Clearance of the main feed dog
in the most retreated position
Standard Adjustment
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