kansai RX UTC User manual

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Industrial Sewing Machines
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RX UTC MANUAL
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O MORIMOTO MFG. CO., LTD.
From the library of: Superior Sewing Machine & Supply LLC

Table bf Contents
1. Setting and Adjusting The Needle Positioner
A. Attaching The Synchronizer
B. Setting The Needle Position
2. Stroke Adjustment of The Knife Air Cylinder
A. Piston Position
8. Return Spring Adjustment
3. Description of The UTC Parts
4. Setting The UTC Knives and Springs
A. Movable Knife Position (Retracted)
B. Fixed Knife Position
C. UTC Springs Adjustments
D. Movable Knife Position (Extended)
E. Front/Rear Position Adjustments of The Movable Knife
F. Movable Knife/Looper Clearance (Front/Back)
5. Fine Tuning The Adjustments
A. Movable KnIfe/Looper Clearance (Top/Bottom)
B. Stationary Knife Base and Knife Stopper Clearance
C Relationship of The Movable Knife To The Threads
6. UTC Spring Tension on The Looper Thread
7. Thread Tension Release Adjustments
A. Tension Release Block/Cylinder Bracket Clearance
B. Tension Opener and Pull Off Hook Positions
C. Tension Release Assembly
8. Knife Position Sensor
9. Pressure Regulator
Page 1
4-6
7-8
9-10
11
11
From the library of: Superior Sewing Machine & Supply LLC

l!^etting
and Adjusting The Needle Positioner (Refer to Fig 1& 2)
[CAUTION] When setting up the synchronizer make sure all connections for the UTC unit are
unplugged to prevent knife activation during the setting procedure. Follow motor manufacturer s
instructions for setting needle position.
Fig 1: To attach the synchronizer to the machine,
secure screws (B) on pulley synchronizer
hub (F). To adjust the depth of the
synchronizer bar (C) loosen nut (D) and
turn synchronizer bar (C).
Fig 2: To set ''needle up''' position, align mark P
on machine handwheel (E) with rivet (0)
on machine casting. This is the proper
timing position.
^With two position motor use needle down
then needle up.
From the library of: Superior Sewing Machine & Supply LLC

2^troke Adjustment of The Knife Air Cylinder (Refer to Fig 3& 4)
Fig 3: Depress the knife cylinder piston.
Measure the clearance between
cushion (D) and collar (A).
Clearance should be 15-15.5mm as
shown in (C).
Fig 4: Adjustment of the air cylinder
return spring: Clearance from
the collar (B) and the cylinder
bracket is shown as dimension
(C). It should be 7mm when the
piston is fully extended. To
adjust loosen the screw in collar
(B), set the correct clearance and
tighten the screw.
-ict-
15-15.5cm
From the library of: Superior Sewing Machine & Supply LLC

^^^escription of The UTC Parts
Adjustment Nut
Cam Adjustment
•Alignment Mark
Looper Thread Catcher Blade
Knife Drive Arm
Needle Thread Catcher Blade
Stationary Knife
-Guide Screw
Movable Knife Base—' ^
Stationary Knife Base
Movable Knife
Movable Knife Guide-
•Stationary Knife Stopper
Movable Knife Height Adjustment
From the library of: Superior Sewing Machine & Supply LLC

^j^etling The UTC Knives and Springs (Refer to Rg 6H6)
Fig 6; Position of the movable knife : As shown in Fig 6 it is critical that movable knife (A) be
aligned evenly with movable knife base (B).
The edge of the base should be parallel with
the knife. To adjust loosen screw (C) and realign properly.
Fig 7: Position of the fixed knife.
Description of Parts:
A - Movable Knife.
a - Needle Thread Catcher Blade.
a' - Looper Thread Catcher Blade.
D - Stationary Knife.
d - Stationary Knife Cutting Edge.
E - Screws for Adjusting Stationary Knife.
When fully retracted the looper thread catcher
blade (a') should be 0.5-0.8mm behind the
stationary knife cutting edge (d). To adjust, loosen
screws (E) and set the proper clearance as
described above.
From the library of: Superior Sewing Machine & Supply LLC

Fig 8: Adjust the lowtension spring (F) so that the needlethreads are cut and released cleanly
while the looper thread is cut and held in place by the low tension spring (F).
Spring adjustments are made by loosening the
following screws:
Screws (E) allow for adjustment of the movable
knife and the low tension spring. Screws (I) allow
for adjustment of the high tension spring.
The distance from the edge of the stationary knife
to the leading edge of the high tension spring
should be 1.2 to 1.5mm.
The leading edge of the low tension spring should
extend 0.5mm beyond the edge of the stationary
knife.
Note:
Make sure that the needle threads are cleanly
released and not held by this spring.
Fig 9: With knife fully extended the tip of the
movable knife should be even with the
front edge of the looper (Line A). The tip
of the movable knife is 2.5mm past the
center of the looper eye.
Fig 8
1.2~1.5mm
0.5 mm
Fig 9
[*,
II p (FRONT)
2.5mm
From the library of: Superior Sewing Machine & Supply LLC

Fig 10: To adjust the front/rear position of the
movable knife, loosen screw (C) and
adjust cam (D) in direction (A) to move
the knife to the rear or direction (B) to
move the knife forward.
Fig 11: With the knife fully retracted, the
clearance between the rear edge of the
looper and the front edge of either the
movable or stationary knife is 4.5~5.0mm.
Fig 10
(o\
C—V \\ A
^ \ B
D-^
Fig 11
in
From the library of: Superior Sewing Machine & Supply LLC

5> ine Tuning The Adjustments (Refer to Rg 3 &5)
To increase the clearance between the looper and the knife refer to Fig 5 and loosen
the adjustment nuts. If it is required to bring the knife forward, adjust the nuts so as to reduce
dimension (Z). If it is required to bring the knife back, then adjust the nuts so as to increase
dimension (Z).
An alternative method for increasing or decreasing the clearance between the looper and the
knife is to adjust the stroke of the knife cylinder piston as shown in Fig 3. To increase the
clearance between the knife and the looper, increase the clearance between cushion (D) and
collar (A).
When any adjustments are made to the stroke of the knife air cylinder, it is required that
the position of the knife be readjusted.
The recommended clearance
between the top of the looper
and the movable knife is 0.5
~1.0mm as shown in Fig 12.
To adjust the height between
the looper and the movable
knife, refer to Fig 13. Loosen
screws (A) and raise or lower
the bracket (E) so as to obtain
the proper clearance as shown
in Fig 12.
From the library of: Superior Sewing Machine & Supply LLC

Fig 13: Clearance between stationary knife base
and stationary knife stopper: As the knife
is extended it first moves forward over the
looper. At this time the stationary knife
base contacts the stationary knife stopper.
At this time the movable knife guide (C)
gently touches the movable knife base so
as to stabilize the motion of the knife.
Fig 14 & 15;
Correct position of movable knife : Fig 14
demonstrates the incorrect stroke of the
movable knife resulting in the knife not
catching the needle thread (B) and looper
thread (D). Fig 15 demonstrates the cor
rect stroke of the movable knife. As this
diagram shows, the knife passes through
the center of the needle threads and in
front of the looper thread thereby
enabling the blade to catch and cut the
threads properly.
Fig 13
From the library of: Superior Sewing Machine & Supply LLC