Texi Fox 25 User manual

SERVICE MANUAL
MODEL: 990
Texi Fox 25
SERVICE MANUAL

Texi Fox 25

Texi Fox 25 1
FACE COVER ------- -----------------------------------------------------------------------2
TOP COVER-------------------------------------------------------------------------------2
BASE PLATE------------------------------------------------------------------------------3
FRONT COVER---------------------------------------------------------------------------4
REAR COVER----------------------------------------------------------------------------5
TOP TENSION-----------------------------------------------------------------------------6
BOBBIN TENSION------------------------------------------------------------------------7
PRESSER BAR HEIGHT AND ALIGNMENT------------------------------------------8
NEEDLE SWING--------------------------------------------------------------------------9
NEEDLE DROP--------------------------------------------------------------------------10
CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD
NO.1)--------------------------------------------------------------------------------------11
CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD
NO.2)--------------------------------------------------------------------------------------12
FEED DOG HEIGHT--------------------------------------------------------------------13
NEEDLE HEIGHT------------------------------------------------------------------------14
NEEDLE TIMING TO SHUTTLE------------------------------------------------------15
FEED BALANCE ON STRETCH STITCH-------------------------------------------16
BARTACK FEED OF BUTTONHOLE-------------------------------------------------17
BUTTONHOLE FEED BALANCE-----------------------------------------------------18
DISENGAGEMENT OF CAM FOLLOWER------------------------------------------19
FOOT PAD HEIGHT --------------------------------------------------------------------20
BOBBIN WINDING ----------------------------------------------------------------------21
AUTOMATIC THREADER POSITION------------------------------------------------22
MOTOR BELT TENSION---------------------------------------------------------------23
WIRING FOR SOCKET UNIT 24----------------------------------------------------------
1.DISASSEMBLY AND ASSEMBLY FOR COVER
2.MECHANICAL ADJUSTMENT
3.CAVEAT
CONTENTS

Texi Fox 25
2
FACE COVER
TO REMOVE
Remove the setscrews (A) and (B) to remove the face cover.
TO ATTACH
Attach the face cover in reverse procedure of the removing.
TOP COVER
TO REMOVE
Remove the setscrews (A), (B) and (C) to remove the top cover.
TO ATTACH
Attach the top cover in reverse procedure of the removing.
DISASSEMBLY AND ASSEMBLY FOR COVER
Face cover
A
B
Topcover
B
A
C

Texi Fox 25 3
BASE PLATE
TO REMOVE
1. Pull out the accessories box. (See pic.1)
2. Remove the setscrews (A), (B), (C) and (D) to remove the base plate. (See
pic.2)
TO ATTACH
Attach the base plate in reverse procedure of the removing.
DISASSEMBLY AND ASSEMBLY FOR COVER
pic.1
Accessories box
pic.2
Base plate
ABC
D

Texi Fox 25
4
FRONT COVER
TO REMOVE
1. Remove the setscrews (A), (B). (See pic.1)
2. Remove the setscrews (C) and (D). (See pic.2)
3. Remove the setscrews (E) and (F). (See pic.3)
4. Remove the knobs (G) and (H). (See pic.4).
5. Remove the front cover.
TO ATTACH
Attach the front cover in reverse procedure of the removing.
DISASSEMBLY AND ASSEMBLY FOR COVER
pic.2
pic.1
Front cover
A
B
C
D
pic.3
E
F
pic.4
G
H

Texi Fox 25 5
REAR COVER
TO REMOVE
1. Remove the setscrews (A) and (B). (See pic.1)
2. Remove the setscrew (C). (See pic.2)
3. Remove the setscrew (D). (See pic.3)
4. Lift the presser foot lever, remove the rear cover clearing the presser foot lifter
from the slit on the cover.
TO ATTACH
Attach the rear cover in reverse procedure of the removing.
DISASSEMBLY AND ASSEMBLY FOR COVER
pic.1
Rear cover
B
A
pic.2
C
pic.3
D

Texi Fox 25
6
TOP TENSION
TO CHECK
The top tension should be when pulling the thread up. (See between 70~90g
pic.1)
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE :
1. Remove the face cover, top cover, base plate and front cover (See page 2-4).
2. Set the tension dial at “4”. (See pic.2)
3. Lower the presser foot. (See pic.3)
4. Check the tension of top thread by a tension meter.
If the top tension is too loose, turn the nut (C) in the direction (A). (See pic.4)
If the top tension is too tight, turn the nut (C) in the direction (B). (See pic.4)
5. Recheck the top tension .
6. Attach the covers.
MECHANICAL ADJUSTMENT
pic.1
Tension meter
between 70~90g
Thread
Presser foot
pic.3 pic.4
Press shrapnel
to turn the nut
Shrapnel
A
B
C
pic.2
Groove
"4" should
be in line
with groove

Texi Fox 25 7
BOBBIN TENSION
TO CHECK:
The bobbin thread tension should be between 35~45g when pulling the
thread by a tension meter.
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE :
1. Turn the adjusting screw (C) in the direction of (B) when the bobbin thread
tension is too tight.
2. Turn the adjusting screw (C) in the direction of (A) when the bobbin thread
tension is too loose.
3. Recheck the bobbin tension.
MECHANICAL ADJUSTMENT
pic.2
B
A
Thread
pic.1 Tension meter
between 35~45g
C

Texi Fox 25
8
PRESSER BAR HEIGHT AND ALIGNMENT
TO CHECK:
1. The distance between the presser foot (D) and the needle plat (E) should be
between 5.5-6.0mm when lift the presser foot lever (A).
2. The presser foot should be cover the feed dog slots and parallel with it when
you put down the presser foot lever (A).
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE :
1. Remove the face cover (See page 2).
2. Loosen the setscrew (B) to remove the LED lamp.
3. Raise the presser foot lever (A) and loosen the setscrew (C) on presser bar
holder.
* Push up or down the presser bar to adjust the high of presser foot.
* Horizontal rotation the presser bar to adjust the parallelism of presser
foot.
4. Tighten the setscrew (C) after adjustment.
5. Attach the LED lamp and the face cover.
NOTE: When you tighten the setscrew (C), make sure that both sides of the
presser foot are parallel to the feed dog slots (F) on the needle plate.
MECHANICAL ADJUSTMENT
LED lamp
5.5~6.0mm
D
E
C
A
B
F

Texi Fox 25 9
MECHANICAL ADJUSTMENT
NEEDLE SWING
TO CHECK:
Adjust the needle swing according to the following procedure, if the needle bar
starts moving sideways while the needle is in the fabric when sewing the zigzag
pattern (with maximum zigzag width).
ADJUSTMENT PROCEDURE:
1. Turn the pattern knob to “C” ( ).
2. Remove all machine covers (See page 2-5).
3. Loosen two setscrews.
4. Adjust the needle swing by turning the handwheel while holding the worm so as
not to rotate it, until the needle swing starts at 3~6mm above the needle plate
after the needle has come out of the right side of the needle hole.
5. Tighten two setscrews.
6. Recheck the needle swing.
7. Attach all machine covers.
NOTE: After adjusting the needle swing,
check that the upper shaft worm and
gear rotate smoothly without any
backlash between them.
3~6mm
pic.1
pic.2
Upper shaft worm
Gear
Setscrew
(2 pcs.)

Texi Fox 25
10
MECHANICAL ADJUSTMENT
NEEDLE DROP
TO CHECK:
When the needle swings in maximum zigzag width, the distance between both
ends of the needle hole on the needle plate and the needle drop positions should
be equal.
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the face cover (See page 2).
2. Turn the pattern knob to “C” ( ).
3. Loosen the setscrew (A).
4. Turn the eccentric wheel to adjust the needle drop.
5. To check the distance between both ends of the needle hole on the needle plate
and the needle drop positions should be equal.
6. Tighten the setscrew (A).
7. Recheck the needle drop.
8. Attach the face cover. Needle position Needle hole
Both clearances should be equal pic.1
aa
Screw driver
pic.2
A
B

Texi Fox 25 11
MECHANICAL ADJUSTMENT
CLEARANCE BETWEEN NEEDLE AND HOOK
(ADJUSTMENT METHOD NO.1)
TO CHECK:
The clearance between the needle and shuttle race should be 0~0.1mm.
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the face cover (Refer to page 2), open the shuttle cover, then remove
the shuttle race cover and the bobbin case.
2. Set the pattern select dial at “B” ( ) .
3. Loosen setscrew “A” as pic. 2. the
4. Move the needle bar supporter (B) in the direction of the arrows to adjust the
clearance.
If clearance is too wide, move the needle bar supporter to direction (D).
If clearance is too narrow, move the needle bar supporter to direction (E).
5. Tighten the setscrew (A).
6. Recheck the clearance.
7. Attach the face cover.
NOTE: After this adjustment, check the clearance between the needle and
needle plate.
* If it is correct and same as pic.3, then the adjustment is finished.
* If not same as pic.3, adjust according to above procedure firstly and
adjust the clearance between needle and shuttle race by using adjustment
method No. 2 (see next page).
Needle Needle hole
pic.3
c
c
0~0.1mm
pic.1
Both clearances of
"C" should be equal
Screw driver
pic.2
A
B
D
E

Texi Fox 25
12
MECHANICAL ADJUSTMENT
CLEARANCE BETWEEN NEEDLE AND HOOK
(ADJUSTMENT METHOD NO.2)
TO CHECK:
Use this adjustment method NO. 2 if the clearance cannot be adjusted by the
method NO.1.
The clearance between the needle and shuttle race should be 0~0.1 mm.
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE :
1. Set the pattern selector dial at "B" ( ).
2. Remove all covers (See page 2-5) and remove the shuttle and the shuttle race
cover.
3. Loosen the setscrew (A) on the lower shaft bushing and slide the gear about
0.5 mm to the right to create some slack between the gears.
4. Lower the needle and loosen the two shuttle race setscrews (B).
Move the shuttle race unit axially either forward or backward to adjust the
clearance between the needle and the shuttle race in the range of 0~0.1 mm.
5. Set the pattern select dial at "C " ( ), turn the handwheel to check if the
clearance between the needle and inner edges of the shuttle race spring at the
left and right needle drops are equal.
If not, adjust by turning the shuttle race unit.
6. Tighten the two shuttle race setscrews (B).
7. Loosen the setscrew on the lower shaft bushing and slide the gear back to the
original position while adjusting the backlash.
8. Tighten screw (A) firmly.
9. Attach all the covers.
NOTE: The rotary play of the tip of the shuttle driver should be less than 0.3
mm and the lower shaft should turn smoothly.
After the adjustment, check the hook timing. 0~0.1mm
pic.1
Clearance should be equal
Needle position
Shuttle race
cover
pic.3
A
Lower shaft bushing (front)
Shuttle
race setscrews (B)
(2 pcs.)
pic.2

Texi Fox 25 13
FEED DOG HEIGHT
TO CHECK:
nd turn the hand wheel towards you to bring the feed dog to Lift the presser foot a
its highest position. The height of the feed dog from the needle plate should be
between 0.9~1.1mm. (Pic.1)
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Raise the presser foot and turn the hand wheel towards you to bring the feed
dog to its highest position.
2. Remove the accessories box and open the shuttle cover.
3. Loosen the setscrew (A).
4. Turn the screw (B) to adjust the height of feed dog.
5. After finishing, tighten the setscrew (A).
6. Turn the handwheel toward you to recheck the height of the feed dog.
7. Attach the accessories box.
MECHANICAL ADJUSTMENT
Needle plate
Feed dogs
0.9～1.1mm
pic.1
Screw driver
Screw driver pic.2
A
B

Texi Fox 25
14
MECHANICAL ADJUSTMENT
NEEDLE HEIGHT
TO CHECK:
Turn the pattern dial to “B” ( ), then turn the handwheel until the needle is in its
left and lowest position, the distance between the tip of the needle (C) and the
inner hole wall of shuttle (B) should be in the range of 0~0.4mm.
If it is not in the range, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the face cover (See page2), open the shuttle cover, remove the shuttle
and the shuttle race cover.
2. Turn the pattern dial to “B” ( ).
3. Turn the handwheel toward you until the needle is in its left and lowest position.
4. Loosen the setscrew (A), Adjust the height of needle by moving the needle bar
upward or downward without turning it.
5. Tighten the setscrew (A).
6. Recheck the needle height.
7. Attach the shuttle race cover and shuttle, close the shuttle cover and attach
face cover.
pic.1
0~0.4mm
B
C
pic.2
A
Screw driver
Needle bar

Texi Fox 25 15
MECHANICAL ADJUSTMENT
NEEDLE TIMING TO SHUTTLE
TO CHECK:
When the needle at the right needle position, when the tip of the shuttle hook (E)
meets the right side of the needle in ascending travel of the needle from its right
and lowest position, the distance between the top of the needle eye (F) and the
tip of the shuttle hook (E) should be in the range of 0.8~1.2mm.
If it is not within the above limit, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the face cover (See page 2), open the shuttle cover, remove the
shuttle and the shuttle race cover.
2. Turn the pattern dial at “C” ( ).
3. Loosen the setscrews (A) and (B), turn the lower shaft to adjust the crank
needle timing.
4. Tighten the setscrews (A) and (B).
5. Recheck the needle timing.
6. Attach the shuttle cover and shuttle, close the shuttle cover and attach the
face cover.
pic.2 Screw driver
CB
A
pic.1
0.8~1.2mm
E
F

Texi Fox 25
16
MECHANICAL ADJUSTMENT
FEED BALANCE ON STRETCH STITCH
TO CHECK:
Turn the pattern dial at “D” ), and set the stitch length dial at “SS”, the stretch (
pattern should be same as the first one on pic 1.
If it is distorted as A or B on pic. 1, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the top cover. (See page 2)
2. Turn the adjusting screw (E).
If same as A, turn the screw (E) in the direction (C).
If same as B, turn the screw (E) in the direction (D).
3. Recheck the stretch pattern.
4. Attach the top cover.
pic.1
（A） （B）
pic.2
E
Screw driver
C
D

Texi Fox 25 17
MECHANICAL ADJUSTMENT
BARTACK FEED OF BUTTONHOLE
TO CHECK:
If the material is fed forward or backward when sewing bartack on buttonhole,
make an adjustment as follows:
ADJUSTMENT PROCEDURE:
1. Turn the pattern dial on “ ”.
2. Remove the .face cover, top cover, base plate and front cover (See page 2-4)
3. Turn the adjusting screw.
Place a piece of paper under the foot and turn the handwheel.
If the paper is fed forward, turn the adjusting screw in the direction of (C).
If the paper is fed backward, turn the adjusting screw in the direction of (D).
4. Recheck the bartack of buttonhole.
5. Attach the covers.
Adjusting screw
DC
Backward feeding
Forward feeding
Stitch length dial

Texi Fox 25
18
BUTTONHOLE FEED BALANCE
TO CHECK:
When sewing buttonhole, the stitches on each side of buttonhole should be the
same stitch density.
If it is same as A or B on pic. 1, adjust as follows:
ADJUSTMENT PROCEDURE:
1. Remove the top cover.
2. Turn the adjusting screw (E).
* If same as A, turn the pattern knob to , turn the screw (E) in the direction (C).
* If same as B, turn the pattern knob to , turn the screw (E) in the direction (D).
3. Recheck the buttonhole density.
4. Attach the top cover.
MECHANICAL ADJUSTMENT
AB
Left backward feeding
pic.1
Right forward feeding
pic.2
E
DC