Functional Check - Bernina B 590 Service And Maintenance Manual

9.5.3 Functional check

Consider customer complaints, if any, when carrying out functional checks.
The resulting diagnosis must be taken into account in addition to the normal maintenance check.
What to check
Visual check:
Covers
1.
LCD / touch screen
Spool holder
2. Functioning
3. Needles
Power cable
4. Foot control cable
5. Switch machine on and let it run
Functions to test with machine switched on
6.
Machine
7. Functioning of connections
(Remove covers)
8. Ribbon cable
Single-strand cable
9. Rough visiual check of settings
10. Drive motor
Smooth running of the machine mechanical ease
11.
of movement
BERNINA International AG
• Scratch marks and signs of having dropped the machine
• Tears and cracks
• Clearance/gap widths
• Power Switch
• Properly attached
• Bent
• Blunt
• of low quality
• wrong system
• Damaged insulation
• Loose contacts / interruptions
• Squashed cables
• Connectors
• Listen for unusual noises and noise level
• Foot control adjustment
• Stepping motors
• Sewing light
• Keys and buttons
• Stitch width and stitch length adjustment
• Touch screen
• Screen / LCD
• Threading process
• Embroidery module
• Foot control
• USB data stick
• M/C-PC link
• Damaged insulation
• Loose contacts / interruptions
• Squashed cables
• Connections
• Needle tolerance
• Needle-/hook distance
• Feed-dog synchronization (lift and advance timing)
• Main shaft-/base shaft synchronization
• Bearing play
• Mechanical ease of movement (smooth running)
• Drive belt
Shaft and axes play
• Main and base shaft
• Thread take-up crank
• Needle bar support / needle bar
• Swing bearing
• Bevel gears
• Bobbin case / hook
• Drive belt tensions
Seestrasse 161 CH-8266 Steckborn
DRAFT – VERSION
What to check for specifically
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