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12. Adjustment of the feed dog driving eccentric
Requirement:
When the hole of the take-up lever is at its highest position, the feed dog must move farther back
by 0.4 to 0.8 mm.
When screw 45 of the driving eccentric 44 is aligned with the screw 43 of the arm shaft crank 42,
the above requirement is fulfilled (fig. 12).
Check:
● Fold up the carrying handle.
● Turn out both arm cover retaining screws and remove arm cover.
● Carry out a visual check to make sure that screws 43 and 45 are aligned.
Adjustment:
● Loosen screw 45.
● Turn eccentric 44 until both screws 43 and 45 are aligned.
● Tighten screw 45.
Test:
● Carry out a visual check.
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