The presser bar lever is completely raised The presser bar lever is partially raised 3. POSITIONING OF PRESSER BAR AND PRESSER FOOT Bottom face of the presser foot rests incorrectly (not flush) on the teeth of the feed dog TIMING THE ZIG-ZAG MECHANISM AND THE NEEDLE BAR (FOR BU MACHINES ONLY) GENERAL RULE Timing procedure The feed dog To remove the gauge AC 4/68ĪDJUSTING THE MAXIMUM RISE OF THE FEED DOG TEETH ABOVE THE NEEDLE PLATE - GENERAL RULE AC 4/68 and of the square-angled bar E 2. II Adjustment - position of the needle eye in relation to the shuttle III Adjustment - distance between the needle and the shuttle IV Adjustment - centering the needle in relation to the race cover plate 1. TIMING OF SHUTTLE AND NEEDLE BAR IN THE BU NOVA AND BU MIRA MACHINES I Adjustment - height of the needle bar. IMPORTANT - ADJUSTMENT OF THE SHUTTLE CARRIER SHAFT IN BF AND BU MACHINES. IV Adjustment - position of the needle eye in relation to the shuttle page 20 Timing procedure II Adjustment - distance between the needle and the shuttle III Adjustment - centering the needle in relation to the race cover plate TIMING OF SHUTTLE AND NEEDLE BAR IN THE BF NOVA AND BF MIRA MACHINES I Adjustment - height of the needle bar. TECHNICAL CHARACTERISTICS OF NECCHI SEWING MACHINESĪDJUSTING THE MOVEMENTS OF THE VARIOUS GROUPS OF PARTS IN RELATION TO EACH OTHER (TIMING THE MACHINE) Adjusting the thread tensions » 12 ELEMENTARY INSTRUCTIONS ON MACHINE MAINTENANCE 1. Correct threading of the BF and BU Nova machines » 8 4. Correct threading of the BF and BU Mira machines. INSTRUCTIONS FOR SERVICING NECCHI SEWING MACHINES page 1 Tools and necessary accessories » 4 Instructions to be given to the customer » 5 1. Service Manual instructions for servicing Necchi sewing machines Instructions for servicing Necchi sewing machines
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