Artista 630 Upper Thread Tension (Basic Setting); Artista 640 Upper Thread Tension (Basic Setting) - Fritz Gegauf Bernina artista 630 Service Manual

5.29 artista 630 upper thread tension (basic setting)

Standard:
•
Use Mettler white thread (cotton Ne60/2 Nm 43.1/2)
for testing. Thread machine up to and including
thread take-up lever (incl. rear thread guide).
•
Turn adjusting wheel until the red bar mark is in line
with the mark on the housing.
•
Take-up lever must be in a position that it is
farthermost away from the front cover (approx.
needle highest position).
•
Lower presser foot and unwind about 30cm thread
from the spool.
•
The 85g thread tension weight (398 080 040) must
not move.
•
Add 8g (5g + 3g) additional weight. Now the thread
should unwind very slowly.
Correction:
•
Turn adjusting wheel as appropriate.
•
Hold clamp lever (112) pressed down (adjusting
wheel is now unlocked).
•
Turn adjusting wheel until the red bar mark is in line with the mark on the
housing. Be careful ONLY turn the dial
•
Engage clamp lever (112) as appropriate.
•
Sewing-off (p. 18).

5.30 artista 640 upper thread tension (basic setting)

Standard:
•
Reset the electronic upper thread tension (service program 5f and 5i)
•
Use Mettler white thread (cotton Ne60/2 Nm 43.1/2) for testing. Thread machine up to and including
thread take-up lever.
•
Take-up lever must be in a position that it
is farthermost away from the front cover.
•
Lower presser foot. Pin upper thread
stepping motor (26).
•
Unwind about 30cm thread from the spool.
•
Attach upper thread tension weight
(398 080 040) to thread end.
•
The 85g (5g + 3g) weight must not move.
•
Add 8g additional weight. Now the thread
should unwind very slowly.
Correction:
•
Adjust adjusting wheel (25) appropriately.
•
Sewing-off (p. 18).
85g thread tension weight (398.080.040)
5g tolerance weight (398 117 030)
3g tolerance weight (398 142 030)
Service-Manual_artista_630_640_english_V4.01_032069_50_04.doc
112
25
26
65