Baby Lock BLE1 Service Manual page 12

13. TROBLESHOOTING GUIDE FOR JET-AIR THREADING
NOTE: Before adjustment of JET-AIR THREADING SYSTEM,
please check the following items.
1 Is the machine lock button engaged?
2 Is the looper threader selector at the appropriate setting?
"U" position for Upper Looper
"L" position for Lower Looper
"C" position for Chain Looper (BLE8, BLE8W, BLE5)
3 Is there at least 2cm of the thread end in the threading port?
4 Is there at least 40cm of loose thread beyond the threads guide above
the threading port?
5 Is there a kink or twist in the 40cm of thread to restrict the blow into threading port?
6 Did you pull out old thread from loopers completely?
7 Is there any lint or dust in the threading port ?
8 Did you depress the looper threader lever strongly?
9 Is the machine for two thread sewing? (Is the subsidiary looper set?)
10 Did you use proper (regular) thread?
Special decorative or thick threads are not threaded by JET-AIR.
6
9
(EXCEPT BLE1SX)
3 2
7
8
1
10
4 5
11
A
B
C
D