Chapter 5 Adjustments; Tensioning The Drive Belt; Tensioning The Base Shaft Belt - Fritz Gegauf Bernina artista 630 Service Manual

Important:
To enable the work described to be performed correctly, the sewing / embroidery computer must be in good
mechanical and electrical condition (running smoothly, properly lubricated and all leads connected)! When
adjustments are carried out in the correct order, the sewing / embroidery computer will function without a
problem.
Important:
Always use a size «Nm 80» needle when adjusting and setting the machine, unless otherwise specified. Always
check the needle before carrying out adjustments on the sewing/embroidery computer! It must be absolutely
straight (130/705 H TCN).
When servicing, always use genuine BERNINA parts and accessories, either the ones supplied with the
machine or purchased afterwards. These are the following: Mains cable, foot control, buttonhole foot, bobbin
case with bobbin, BSR foot (if applicable) and other accessories.

5.1 Tensioning the drive belt

•
Slightly loosen the securing screws
(25a).
•
Position the motor as required.
Retighten both screws.
Tensioning:
•
The drive belt is correctly tensioned
when there is about 5mm play at half
height of the belt when pushing against
it slightly.
•
Check for ease of movement.

5.2 Tensioning the base shaft belt

•
The belt is automatically tensioned by the belt tensioner and tension spring.
•
Slightly loosen screw (46) of the idler pulley (47).
•
Turn hand wheel back by half rotation.
•
Retighten screw (46).
Chapter 5
Adjustments
Service-Manual_artista_630_640_english_V4.01_032069_50_04.doc
46
47
25a
25a
44