SINGER UT-1 - Manual (Page 13)

WHEN RE-SHARPENING THE KNIVES, OR
CHANGING THE KNIVES OR TAKING OFF
THE SPREADER TRIMMER SET IF
NECESSARY, PLEASE ASSEMBLE BACK
THE SPREADER TRIMMER ACCORDING
TO FOaOWJNG ITEMS.
MOVABLE
KNIFE SHOULD SLIDE SMOOTHLY
IN THE SLIDE BLOCK AND CAN NOT HAVE
ANY INTERVAL BETWEEN MOVABLE KNIFE
AND SLIDE BLOCK.
THE SIDE EDGE OF FIXED KNIFE SHOULD
MATCH EVENLY WITH FIXED KNIFE HOLDER.
FIXED KNIFE HOLDER
MATCH
EVENLY
FIXED KNIFE
WHEN MOVABLE KNIFE MOVE BACKWARD.
THE HOOK BLADE OF MOVABLE KNIFE
SHOULD RETREAT O.Sm.m. INSIDE FROM
THE BLADE OF FIXED KNIFE.
MOVABLE KNIFE
FIXED
KNIFE
HOOK
BLADE
(L5MH^
INTERVAL
WHEN MOVABLE KNIFE MOVE TO ITS UPPERMOST
DEAD POINT. THE FRONT EDGE OF THREAD
CLAMP SPRING AND MOVABLE KNIFE SHOULD
BE EVEN. AND THE FRONT EDGE OF KNIFE
PRESSURE SPRING AND FIXED KNIFE SHOULD
BE EVEN.
MOVABLE
-KNIFE
FIXED
KNIFE
THREAD 'MATCH
CLAMP EVENLY
SPRING
ADJUSTING SCREW IS USED FOR SETTING
THE TENSION OF CUMP SPRING IN ORDER
TO HOLD THE ORNAMENTAL THREAD
PROPERLY. IF THE TENSION BETWEEN
THREAD CLAMP SPRING AND MOVABLE
KNIFE IS TOO BIG, THEN MOVE THE KNIFE
PRESSURE SPRING FORWARD IN ORDER
TO GET PROPER TENSION,
FIXED KNIFE
•KNIFE
MOVABLE KNIFE
SET SCREW
CLAMP
SPRING