3
NC-UT
series
【
5
】
ADJUSTING THE THREAD TRIMMER
5-1 Position of the movable knife and the stationary knife
■
Position of the movable knife
Set the (a 1) part of the movable knife A parallel to the
(g 1) part of the stationary holder G.
Set the distance from point of movable knife A and the
center of left screw H at approximately T (mm).
■
Relation between the stationary knife and the movable
knife.
Adjust the engagement between blade (a 3) for trimming
looper thread and stationary knife to be U (mm) when
movable knife is at the extreme right.
So that the point of blade (a 2) for cutting needle thread
pass the corner (b 1) of stationary knife B.
The adjustment is made by loosening screw C.
5-2 Adjusting the looper thread clamp spring
Position of looper thread clamp spring D so that the part
(a 1) of movable knife and the part (d 1) of looper thread
clamp spring are on the same plane.
And adjust it will protrude approximately V (mm) from
the point of movable knife A when movable knife is at
the extreme right.Adjustment is made by loosening
screw C.
To adjust the pressure of thread clamp spring D, turn
adjusting screw E. To increase the pressure, turn it
clockwise. To decrease the pressure, turn it
counterclockwise.
5-3 Adjusting the movable knife pressure spring
Position of movable knife pressure spring F so that the
part (a 1) of movable knife and the part (f 1) of movable
knife pressure spring are on the same plane. And
adjust it will protrude approximately W (mm) from the
point of movable knife A when movable knife is at the
extreme right.
Adjustment is made by loosening screw E.
MODEL
T
NC UTA,UTE
73.5mm
NC J series UTAB
74.5mm
MODEL
U
V
W
NC UTA,UTE
2.5mm
2mm
6.2mm
NC J series UTAB
1.5mm
3.3mm
7.5mm
4
NC-UT
series
5-4 Adjusting the stationary knife holder stopper
The stationary knife holder I slides to the left and
stops by stationary knife holder stopper J.
Never slide the stationary knife holder I to the left too
much because the looper thread clamp spring touches
the looper. The adjustment is made by loosening
screw K and moving stationary knife stopper left and
right. The standard position, the left end of
stationary knife holder stopper is 1mm right from the
left end of base plate R.
5-5 Adjusting the movable knife holder left and right
With movable knife A at the extreme left end of its travel, there should be a distance of A
(mm) from the center of the needle bar to the point of movable knife.
To make the above adjustments, loosen nut T and move the pin S make a fine left-to-right
adjustment by turning nut T. The point of the movable knife is center between the point of
the looper and the eye’s of the looper when move extremely left position of the knife.
5-6 Adjusting the movable knife front to back
To adjust the movable knife front to back, center the point of movable knife over the looper
with the point of movable knife 12mm moved to the left from the right end of looper. To
adjust, when loosening screw U and turning guide lever ring P clockwise, the movable knife
point moves forward and turning it counterclockwise, the point moves backward.
At the same time, movable knife holder guide N should slightly touch the end of movable
knife holder. The adjustment is made by loosening screw V.
MODEL
A
NC
UTA,UTE
22mm
NC J
UTAB
24.6mm
< Note >
In case of the extremely large or small feed amount, necessary fine adjustment of the movable
knife position.
(
See chapter 5
-
8
)
Summary of Contents for NC Series
Page 2: ......
Page 3: ......
Page 4: ......
Page 5: ......
Page 6: ......
Page 7: ......
Page 8: ......
Page 9: ......
Page 10: ......
Page 11: ......
Page 12: ......
Page 13: ......
Page 14: ......
Page 15: ......
Page 16: ......
Page 17: ......
Page 18: ......
Page 19: ......
Page 20: ......
Page 21: ......
Page 22: ......
Page 23: ......
Page 24: ......
Page 25: ......
Page 26: ......
Page 27: ......
Page 28: ......
Page 29: ......
Page 30: ......
Page 31: ......
Page 32: ......
Page 33: ......
Page 34: ......
Page 35: ......
Page 36: ......
Page 37: ......
Page 38: ......
Page 39: ......
Page 40: ......
Page 41: ......
Page 42: ......
Page 43: ......
Page 44: ......
Page 45: ......
Page 46: ......
Page 47: ......
Page 48: ......
Page 51: ...NC Series Instruction Manual NC1103 4 G series ...
Page 63: ...NC J SJ Series Instruction Manual NC1001GSJ NC1001GSJF NC1001GJ ...