Service-Manual_artista_630_640_english_V4.01_032069_50_04.doc
32
162
161
27
27
4.14 Stitch width stepping motor
Disassembly:
1. Remove
covers.
2. Loosen screws (
26a
).
3. Remove adjusting wheel lock (
161
).
4. Remove carefully the adjusting
wheel (
162
) so that the spring
loaded pressure lever remains in
place.
5. Remove pinion (
26
).
6. Remove
CFL
(
p. 28
).
7. Remove the two securing screws
(
27
).
8. Replace stepping motor.
Assembly:
1. Fit new motor and fasten with the two securing
screws.
2. Refit adjusting wheel (
162
). Make sure the
pressure lever fits into the spring, into the
potentiometer and the guide of the adjusting wheel.
3. Refit adjusting wheel lock (
161
).
4. Refit CFL (
p. 28
).
5. Fit pinion in toothed segment centre but don’t
fasten it yet.
6. Reconnect motor. Refit front cover.
7. Attach front cover connect S-Print to both P-Print
and L-Print.
8. Connect mains plug.
9. Start machine in service program mode.
10. Select pinning positions in SP test 4e (
p. 83
).
11. Pinion distance to metal plate is 0.5 mm.
12. Pin pinion and secure.
13. Set needle position (
p.47
).
14. Refit covers.
15. Calibrate buttonhole in SP test 5c (
p. 91
).
16. Carry out a functional check.
17. Sew-off.
Note: artista 640
The toothed segment (
11
) must be placed in center of pinion (
12
)
The driving toothed segment (
10
) must be positioned in toothed
segment center (
11
). It can be seen through the cut-out (
13
).
26a
26
Toothed segment 640
11
13
10
12
