Bernina B 570 - Drive Motor Belt Tension

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 86 von 172
DRAFT – VERSION
5.1.2 Drive motor belt tension
Check:
• With a pressure of approx. 500g onto the belt center a, the belt mustn't move more than ca. 8mm.
Adjustment:
• Remove the two motor fastening screws a and b (T20 M4X12 u-washer 4.2x14x1.5).
• Turn motor clockwise until specified value has been reached. Turn motor counterclockwise to slacken
belt tension.
• Retighten fastening screws a and b.