Adjustment Of The Respective Components; Adjusting The Needle Bar Height; Adjusting The Zigzag Width Needle Entry Position - JUKI HZL-30Z Service Manual

[4] ADJUSTMENT OF THE RESPECTIVE COMPONENTS

4-1 Adjusting the needle bar height

Remove the face cover.
Adjustment
How to adjust 1
How to adjust 2
(1)
Lowest point

4-2 Adjusting the zigzag width needle entry position

Remove the face cover.
How to adjust
• Dimension from the bottom end of the needle bar pin to the top surface of the throat
plate : 19.7 mm
• The needle eyelet inclines to the right by 5° when a needle is attached.
1. Make a gauge needle which has cut a household needle, HA X 1 to dimension A
and attach it to the needle bar.
2. Prepare an appropriate piece of metal as thick as B. (A = 19.7 mm - B)
3. Bring the needle bar to the lowest point of its stroke and slightly loosen setscrew (1)
in the needle bar connection to the extent that the needle bar does not slip down.
4. Place the piece of metal on the throat plate, move the needle bar up or down by hand
so that the cut section of the gauge needle aligns with the top surface of the piece of
metal, and turn the needle bar by 5° as illustrated in the figure.
5. Temporarily tighten setscrew (1) and securely tighten it after re-confirming the
adjustment.
1. Attach a household needle, HA X 1 #14 to the needle bar and adjust the height of
the needle bar in the same way as the adjusting procedure above so that a distance
of 14.83 mm is provided between the top surface of the throat plate and the tip of the
needle when the needle bar is in the highest point of its stroke.
* Setscrew (1) can be loosened at the position where the needle bar is in the lowest
point of its stroke.
How to adjust 1
Needle
(view from the upper part)
19.7 mm
1. Select the zigzag pattern (zigzag width 5 mm) after turning the power switch ON.
2. Adjusting the needle entry position
Loosen the hexagonal eccentric screw and turn the hexagonal eccentric shaft to
adjust so that the tip of the needle is located in the position of 0.5 mm on the right
side from the center of the groove of left stitch base line of the throat plate when the
zigzag width is 5 mm as illustrated in the figure below.
3. After the adjustment, tighten the setscrew.
0.5mm
0 to 5°
Lowest point
Gauge needle
A
Piece of metal
Throat plate
Hexagonal
eccentric shaft
-7- -7- -7- -7- -7-
How to adjust 2
HAx1 #14
Highest point
14.83 mm
Setscrew