JUKI IP-100 Engineer's Manual page 49

Adjustment Procedures
1. Adjusting the moving path of the wiper
1) Set the needle to UP stop position.
Adjust the white marker dot of handwheel 1 to the marker dot of pulley
cover 2. When wiper link A is moved by hand, wiper 3 slides to and
fro by means of ratchet mechanism. At this time, adjust the wiper so
that it passes the center of needle when going and moves in front of the
center of needle when returning by means of the ratchet mechanism.
Loosen wiper setscrew 8 and move wiper 3 up and down to adjust so
that the vertical clearance between the needle and wiper 3 is
approximately 2 mm when returning. In addition, adjust the clearance
between the sides to approximately 0.5 mm to 1 mm.
* When wiper setscre w 8 is loosened, both the directions of vertical and
rotation become free.
2. Adjusting the wiper stroke
1) To adjust the wiper stroke, loosen setscrews 5 and 6, and move the
wiper up and down to adjust so that it is positioned at approximately 1
to 2 mm from the left end of presser foot (Part No. : 40003542) which is
delivered as standard.
3. Adjusting the position of the clamp head
1) Adjust so that the top end plane of wiper is almost parallel to the edge
of clamp head 4. Loosen setscrews 9 to adjust the lateral direction,
and loosen setscrews !0 to adjust the vertical direction.Adjust the
clearance between clamp head 4 and wiper 3 with nuts !1 and !2 .
2) Protruding section of clamp head 4 comes above wiper 3.
4. Adjusting the waiting position of the wiper
1) Lateral position : Adjust the lateral position so that the clearance between
the suction port of clamp head 4 (clamp ball section) and the concave
of wiper 3 is approximately 0 to 1 mm.
2) Vertical position : Adjust the vertical position so that bottom face of wiper 3
is almost flush with the suction port of clamp head 4 (clamp ball section).
* For the adjustment of wiper 3, perform the adjustment work to
repeatedly perform items 1. through 4.
5. Replacing the presser knife
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.
1) Remove two setscrews !4 in the knife fixing plate using a precision
screwdriver and remove knife fixing plate !3 .
2) Remove two setscrews !5 in the knife using a precision screwdriver
and remove knife !6 ( ceramic) from fixing plate !3 . Then replace the knife.
(Caution) 1. When replacing knife !6 (ceramic), be careful of the injury
to the fingers.
2. When replacing knife !6 (ceramic), be careful of its
direction and position. (It should be almost parallel to
knife fixing plate !3 . )
3) 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)
(Caution)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.
4) 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)
Results of Improper Adjustment
™ Wiper 3 comes close most to the
needle when the needle throws to
the right.
There is a case where the wiper
interferes with the needle according
to the position of the wiper. In this
case, re-adjust the position.
™ Adjust so that they slightly come in
contact with each other.
™ When the protruding section faces
the direction other than the upward
one, needle thread clamp failure
occurs.
™ Rate of needle clamp is affected by
the adjustment of the wiper waiting
position.
™ Knife !6 (ceramic)
Part No : 11434206
45
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