Bernina B 570 - Stitch Length Stepping Motor

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 82 von 172
DRAFT – VERSION
b
a
6
0.5
14
14
20
18
Size
3
001356.50.00
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.
Removal of stepping motor:
• 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
service cables
734149.50.00 and 734150.50.00.
•
Start machine in Service
Program.
•
Machine with touchscreen:
Select test
5e (stepping
motors pinning position).