artisan 1798-1 AZ, Instruction Manual

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If feed motion is not timed to needle motion, adjust as follows
1) Remove Arm Side Cover .
2) Loosen Set Screws (A) and (D) of feed and feed lifting eccentric.
Hold Feed and Feed Lifting Eccentric (B) and turn Balance Wheel slowly until the upper edge of Arm Shaft Oil
Hole (C) aligns with the lower edge of Reference Hole (G) of feed and feed lifting eccentric.
Leave a clearance of 0.3-0.5mm between Feed and Feed Lifting Eccentric ( B ) and Eccentric Sleeve ( H ), then
tighten Set Screws ( A ) and ( D ).
19. PERIODICAL CLEANING
A. Machine
1) Remove the throat plate and clean the feed dog.
2) Assembling is to be made by screwing in the screw by 2
to 3rotations by hand at first, then tightening them evenly by
use of a long size screw driver.
3) Lay down the machine head and clean the hook and
inner bobbin case.
B. Maintenance of motor
Remove dust from the motor cover every one or two
month. (If operation is continued with the motor cover
clogged with lint or dust, the motor might overheat.)
C. Control box
Remove dust from the connector (If the connector
covered with dust, machine might misoperation )
D. Cleaning oil pump, screen
Swing out the machine head and clear off the dust and
dirt on oil pump screen.