JUKI DDL-9000B-SH Engineering Manual page 53

Adjustment Procedure
[9000B-SS, B-DS, B-M
The distance is 0.5mm between the knife thread guide
tip of the counter knife
In this case, the distance is 4mm between the needle center and the
blade tip of the counter knife
The blade tip of the counter knife
face.
[9000B-SH]
The distance is 6mm between the needle center and the blade tip of the
counter knife .
(Cautions) 1. The blade sharpness is changed when the blade
mounting angle is changed for the blade tip of the
counter knife
the blade section of the counter knife
exactly with that of the moving knife
2. When the counter knife
examine the blade sharpness, without fail. Also
adjust the mounting angle of the counter knife
Loosen two the counter knife setscrews
the counter knife .
(Cautions) The window (hole section) of the knife thread guide
shall be adjusted so that the needle enters the center
of the hole section.
]
.
.
is located 0.6mm above the mounting
. The sharpness becomes best when
is adjusted or replaced,
and adjust the position of
Results of Improper Adjustment
and the blade
When the counter knife
to the right:
o The bobbin and needle thread
coincides
.
When the counter knife
.
to the left:
o The bobbin and needle thread
– 49 –
is adjusted
drawing length becomes longer
than the standard by the distance
of knife movement and the length
of the needle thread remaining at
the needle tip becomes longer.
(There is a time lag in thread
trimming.)
is adjusted
drawing length becomes shorter
than the standard by the distance
of knife movement and the length
of the needle thread remaining at
the needle tip becomes shorter.
(There is a time reduction in thread
trimming.)