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1. Extreme backward position
When the moving knife moves at the maximum, its position is where
its front tip is withdrawn by 2.5 to 3mm from the needle center. (Other
than 9000A-SH)
(3 to 3.5mm for 9000A-SH)
2. Initial position
Coincidence of the moving knife outer periphery with the V-groove
engraved marker line on the knife-mounting base
<When the amount of withdrawal is
large>
o It becomes impossible to scoop
the needle thread or the bobbin
thread at the time of thread
trimming.
<When the amount of withdrawal is
small>
o Interference between the feed dog
and the moving knife
Adjustment Procedure
Results of Improper Adjustment
Specification
Max. amount of withdrawal
Other than 9000A-SH
2.5 to 3mm
9000A-SH
3 to 3.5mm
Summary of Contents for DDL-9000A
Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...
Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...
Page 60: ... 56 11 Thread trimming unit 7 Replacement of the moving knife Standard Adjustment ...
Page 66: ... 62 11 Thread trimming unit 10 Adjustment of the drive arm stopper Standard Adjustment ...
Page 70: ... 66 12 Adjustment of the wiper DDL 9000A WB OB 2mm 1mm Standard Adjustment ...
Page 72: ... 68 13 Adjustment of feed lever pressure B A Feed lever Standard Adjustment ...
Page 112: ...MEMO ...