BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 85 von 172
DRAFT – VERSION
a
+
-
Chapter 5 – Adjustments
Basics - General Information
To enable the settings and adjustments described to be performed correctly, the machine must be in good
mechanical and electrical condition. (running smoothly, properly oiled and all leads connected)!
When adjustments are carried out in the correct order, the machine will function flawlessly.
Important:
Always use a needle size «Nm 80» when adjusting and setting the machine, unless otherwise specified.
Always check the needle before carrying out adjustments on the machine! The needle must be absolutely
straight (130/705 H TCN).
For servicing, we recommend that you always use the accessories included with the machine or
purchased specifically for it. Which are: power cable, foot control, buttonhole foot, embroidery module and
hoop, BSR foot, and other accessories.
5.1 Belt Tensions
5.1.1 Vertical shaft-/base shaft belt tension
Check:
• Check condition of main shaft-/base shaft drive belt
030955.50.07.
• When slightly pressed (approx. 100g) in the center
of the belt, the belt mustn't move more than 2-3mm.
Note:
Too tightly tensioned belts will cause stiff running.
Too slackly tensioned belts may bounce off.
Adjustment:
• Remove winder unit.
• Basic position of main shaft eccentric spherical
bearing: The adjustment opening a of the eccentric
spherical bearing sits ca. 5.0mm above corner c of frame bar.
• Untighten screw b (T20). Then use adjusting spanner 733019.70.00 to turn the bearing until the
specified tension value has been reached.
• Retighten screw b.
To Next Page
Loading...
