Stitch Length Stepping Motor - Bernina B 590 Service And Maintenance Manual

4.3.20 Stitch length stepping motor

See ESD-related note
Removal of crankshaft:
• Remove the covers (see 4.1).
• Remove screw 5 (T10 30x10). Remove balance axis 3.
• Remove tension springs 13, 23 and 28.
• Disconnect stitch-length stepping motor plug from PCBA-Position.
• Untighten three screws 22 (T20 M4x10).
• Remove clamp, crankshaft and stitch length drive.
stepping motor:
Removal of
• Remove springs 18 and 20. Remove carrier plate.
• Untighten setscrew 6 (T6 3x4). Remove pinion.
• Untighten two screws 14 (T10 M3x6). Remove stepping motor.
Assembly:
•
Fsten stepping motor with
two screws
14 (T10 M3X6).
•
Reconnect PCBA-Position,
front cover and rear cover
with the aid of
734149.50.00 and 734150.50.00
•
Start machine in Service
Program.
•
Machine with touchscreen
Select test (stepping
5e
motors pinning position).
BERNINA International AG
service cables
.
:
Seestrasse 161 CH-8266 Steckborn
DRAFT – VERSION
001356.50.00
20
14
Size
3
Schweiz
14
18
a
b
0.5
6
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