JUKI IP-100A Engineer's Manual page 27

Adjustment Procedures
1) Loosen the screw in the needle bar support base shaft connecting stud referring
to "(7) Adjusting the needle entry position (in terms of needle rocking direction)".
2) Remove the thread take-up cover, thread take-up and face plate. Then loosen
screws 2 and 3 in the needle bar connection guide together with screws 4
and 5 in the needle bar crank rod guide.
3) Loosen screw 1 in the needle bar support base guide shaft and adjust the
needle entry point in terms of longitudinal direction. Then tighten the screw.
(Refer to "(9) Adjusting the needle entry position (in terms of longitudinal direction".)
4) Bring the needle bar to the lower dead position. Move the needle bar support
base in the needle rocking direction until a position at which the base smoothly
slide without a play is found. Now, temporarily tighten screw 3 in the needle
bar connection guide.
5) Bring the needle bar to the upper dead position. Move the needle bar support
base in the needle rocking direction until a position at which the base smoothly
slide without a play is found. Now, temporarily tighten screw 2 in the needle
bar connection guide.
6) Sliding the needle bar support base, tighten screws 2 and 3 in the needle bar
connection guide.
7) Tighten screws 4 and 5 in the needle bar crank rod guide the same as the
steps 4), 5) and 6).
* Set the needle throw slide at the needle bar support base, pressing or drawing
the portion near section A, to 5N (500g) or less.
8) Loosen the screw in the needle bar support base shaft connecting stud
referring to "(7) Adjusting the needle entry position (in terms of needle
rocking direction)".
9) Attach the thread take-up cover, thread take-up and face plate in position.
(Caution) 1. Be sure to check the longitudinal play at the needle bar
support base. In the case where there is any longitudinal play
or extra load, the needle throing action will be affected.
2. Refer to (5) Disassembling/assembling the needle bar
support base shaft (asm.) of 4. PROCEDURES OF
DISASSEMBLING/ASSEMBLING.
Adjustment Procedures
1) Set the mode to the hook adjusting mode. (Refer to (12) Adjusting the needle-to-
hook timing and the needle guard.)
2) Remove the presser foot, throat plate, woodruff plate 2 and feed dog.
3) Place woodruff plate 2 on the surface of the machine bed onto which the throat
plate is to be attached. Now, loosen setscrew 1 and adjust so that the distance
from the top face of woodruff plate 2 to the bottom end of the needle bar is equal
to the height of the "1" side of the timing gauge as shown in the figure.
(Caution) 1. Thickness of the throat plate may be different from that of woodruff
plate 2. So, be sure to use woodruff plate 2 for the adjustment.
(Thickness of woodruff plate 2 : 2 mm)
2.Perform the adjustment with zigzag width set to "0" and with the
needle positioned at the center of the zigzag stroke.
™ Engraved indication "1" side is the height of the needle bar and "2" side the
needle-to-hook timing.
(Caution) 1. Even when the timing gauge is used, the indented part of the
needle may come in contact with the blade point of the hook in
accordance with the kind or size of the needle.In this case, slightly
up or down the needle bar to adjust the height to the indented
part of the needle.
2.The state of delivery of LZ-2290A Series is with timing gauge E
(Engraved indication E).
Results of Improper Adjustment
Results of Improper Adjustment
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