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ADJUSTMENT FOR DECO-UNIT(ADJUSTMENT OF INITIAL POINT
FOR BLUE & YELLOW DECORATIVE THREAD GUIDES
When the undermentioned parts of DECO unit replaced and or the initial point of both (Blue
and Yellow ) Decorative Thread Guides shows incorrect position, it is required to make an
adjustment of the initial point for the both Decorative Thread Guides with following manner:
Name of parts 1. DECO step motor,
2. Gears (miter gears, idling gear, pinion gears and DECO gears(upper and
lower))
3. Sensor
1. Power source should be turned off.
2. Remove back cover and DECO unit after loosing the set screw for DECO unit. (Fig.1-a)
Do not remove 3 sets of wire harness from LCD Printed Circuit Board. Wire fastening
band can be cut off. See page 26-c.
3. Loosen slightly set screws (Fig.4-a) for the miter gear set on the shaft of DECO step motor
and make the miter gear idle on the shaft.
4. Insert Blue & Yellow Decorative Thread Guides into setting hole of DECO gear and
tighten slightly with set screws located inner part of small hole. (Fig.5-k and 6-k)
5. Turn power switch on. All step motor (from DT-1 motor to D.F. motor) perform, one
after another, its movement of return to the initial point and only DECO step motor stops
after free running.
6. At the same condition of Artcle 5, put the unit on the surface plate (Fig.7) and measure
the height at the part of "l" and "m" of the both Decorative Thread Guides. After finding
same height at the both part as 84.3mm, then set a miter gear loosened in the article 3, with
set screws (Fig.4-a) while slightly touching with the another miter gear. If there is a differ
ent height at the "l" and "m", adjust the height with only Blue Decorative Thread Guide
(Fig.8-d) and then fix miter gear. After that , remove Yellow Decprative Thread Guide
(Fig.8-e) from DECO unit and set it again after securing the same height at the "l" and
"m".
7. Adjust the position of sensor Printed Circuit Board (Fig.6-r), so that the end of shelter plate
(Fig.6-t) on the lower DECO gear may locate at the position shown as (Fig.9-v ) and fix the
P.C.B. with set screw (Fig.6-s). The proper position of end of shelter plate may be secured
with gauge No.11684.(Fig.9)
8. Power switch should be turned off and again turn power switch on. Although motor
performs its movement of returning to the initial point, usually Blue & Yellow Decorative
Thread Guides stop with some discrepancy of the position.
9. While power switch on, loosen the set screws (Fig.4-a) for a miter gear on the output- shaft
of DECO step motor.
10. Adjust the position of DECO gears for the Blue & Yellow Decorative Thread Guides,
so that it may secure the proper position (Fig.2) and be in mesh. Then tighten set screws
(Fig.4-a) for miter gear.
11. Make sure the position of both Blue & Yellow Decorative Thread Guides , and if the
position is not proper, it is required to repeat the man ner of Article 7 through 10.
12. Glue together bottom side of Sensor Printed Circuit Board and a protrusion of the
chassis to prevent change of necessary position (Page26 Fig.1-d).
13. DECO unit should be positioned and installed on the Sewing Machine as shown in the
page 26 (Installing of DECO UNIT).
)
27a
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