132
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
8-14.
Replacing procedure of the bird’s nest prevention (CB) type presser knife
1) Remove two setscrews 2 in the knife fixing plate
using a precision screwdriver and remove knife
fixing plate 1.
1
3
4
1
2
The needle thread cutting knife is mounted on the presser delivered as standard for the bird's nest prevention
(CB) type.
The needle thread cutting knife is an article of consumption. When the knife becomes dull, replace it with a new one.
Name of part : Knife (ceramic) Part No. : 11434206
2) Remove two setscrews 3 in the knife using a
precision screwdriver and remove knife (ceramic)4
from fixing plate 1. Then replace the knife.
• When replacing knife 4 (ceramic),
be careful of the injury to the fingers.
• When replacing knife 4 (ceramic), be
careful of its direction and position.
(It should be almost parallel to knife
fixing plate 1.)
Cau
tion
Needle thread clamp ratio when needle does not enter the cloth excessively drops in
comparison with that when needle enters the cloth.
Be sure to operate the wiper on the cloth.
Cau
tion
■ When using the bird’s nest prevention type as the needle thread clamp type
When using as the needle thread clamp type, perform the setting below.
[Example of use]
•
When using as the interlacing failure prevention at the time of sewing from the cloth end.
•
When using the normal presser. (presser without knife)
1. Set the value of function setting No.19 to 1. (Standard “0”)
2. Input the setting of number of stitches of releasing needle thread with function setting No. 28. (“0” to 30
stitches)
■ When using the bird’s nest prevention type as the wiper type
1.
Set the value of function setting No. 18 to “0”. (Standard 1)
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