Visual, Functional, Sewing And Mechanical; Checks - Bernina aurora 430 Service Manual

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Visual, functional, sewing and mechanical checks
Visual checks:
• Visual check of the entire machine
• Visual check of:
• Spool holder
• Thread guiding parts
• Needle in general, and needle position
• Stitch plate
• Feed-dog
• Bobbin case
• Hook
• Hook driver
Functional checks:
• Functioning of FHS presser foot lifter
• Functioning of drop feed-dog
• Functioning of presser foot pressure setting
• Removal of bobbin case
• Functioning of all thread cutters
• Connecting machine with original cable and foot control (check cables for damage)
• LCD screen with backlighting
• Functioning of sewing light
• Functioning of left and right needle position
• Functioning of stitch length and stitch width
• Functioning of CLR button
• Functioning of winder motor
• Test-run the machine and listen for unusual noises and noise level
• Inspect main and foot control cables for damage and/or loose contacts
• Check all stepping motors
• Note machine's operating hours, software version and balance values
• Select basic settings
• Check upper thread monitor
• Check BSR foot (where applicable)
• Check USB Port
Mechanical checks:
• Removal of all covers
• Cleaning of mechanical parts
• Check bevel gears for wear and tear
• Main shaft play
• Base shaft play
• Thread take-up lever
• Check needle bar support for play
• Feed-dog
• Functioning of bobbin case hinge
• Functioning of upper and lower thread tension
• Lubrication of the machine
Sewing checks:
• Sewing-off using straight stitch
• Functioning of the Quick reverse button (securing stitches)
• Sewing-off using:
• Zigzag stitch
• Honeycomb stitch
• Automatic buttonhole
• Automatic darning
• BSR (where applicable)