Titan DK 2500 User manual

TITAN DK 2500
English
OPERATOR'S MANUAL
NV. A. DE KONINCK
Avenue Sleeckx 84-86
B-1030 BRUSSELS -BELGIUM
Phone : ++32/2 216 31 40 Fax : ++32/2 242 41 89
E-mail : [email protected] Web : www.titansew.com

Chapter 1: Installation and lubrication
1. INSTALLATION ................................................................................................................................3
a. Complete machine - with motor and table.................................................................................3
b. Sewing head only .......................................................................................................................5
2. LUBRICATING THE SEWING HEAD....................................................................................................5
Chapter 2: Threading
1. TYPES OF YARNS.............................................................................................................................7
a. Needle yarn................................................................................................................................7
b. Chain yarn .................................................................................................................................7
2. THREADING ....................................................................................................................................7
a. Needle thread.............................................................................................................................7
b. Chain yarn .................................................................................................................................7
Chapter 3: Stitch formation
1. CHAIN YARN FEED ..........................................................................................................................9
2. Stitch density setting......................................................................................................................11
a. On standard equipment............................................................................................................11
b With the stitch density regulator...............................................................................................11
Chapter 4: Mechanic adjustment of the sewing head
1. TYPES OF NEEDLES .......................................................................................................................13
a. How often are the needles to be replaced?..............................................................................13
b. Needle replacement..................................................................................................................13
c Needle height adjustment ..........................................................................................................15
d. Replacing the needle bar and adjusting the needle height ......................................................15
2. UPPER LOOPER..............................................................................................................................17
a. Preparatory work.....................................................................................................................17
b. Replacing the upper looper .....................................................................................................17
c. Upper looper fine adjustment...................................................................................................17
3. THE LOWER LOOPER .....................................................................................................................19
a. Preparatory work.....................................................................................................................19
b. Replacing the lower looper......................................................................................................19
c. Adjusting the upper looper to the lower looper .......................................................................21
d. Adjusting the distance between needle and lower looper........................................................21
4. THE CUTTING MOTION...................................................................................................................23
a. Renewing the upper knife.........................................................................................................23
b. Renewing the lower knife.........................................................................................................23
c. Knife fine adjustment ...............................................................................................................23
d. Aligning the lower blade with the needle plate........................................................................23
5. THE PRESSER FOOT ................................................................................................................. 23-25
6. FEED-DOG.....................................................................................................................................26
7. CHAIN GUIDE ................................................................................................................................27
8. STITCH PLATE FINGER ...................................................................................................................27
Chapter 5: Maintenance schedule
Maintenance schedule........................................................................................................28
From the Library of Superior Sewing Machine & Supply LLC

TIT AN DK2500
YARN STAND
ADD OIL HERE
OIL LEVEL
i------------------------------.
I ·-........_
25841VSC
@a,...___
25841E
25841R
2587012P
LOOPER YARN
25882 ........._
FIG 1.1
2 5884 ........._
25882V
I
vsET 25884
I
I T 16/12/04
From the Library of Superior Sewing Machine & Supply LLC

Chapter 1: Installation and lubrication
1. Installation
a. Complete machine - with motor and table
For units, supplied complete with motor and table, use FIG 1.1+1.4
1. Mount the yarn-stand 25850/2P en screw it on the table.
2. Mount the yarn guide plate SET 25884 on the table.
3. Place the black rubber anti-vibration blocks(25840) in the aluminium holders .
4. Take the TITAN DK 2500 machine out of its box. TAKE CARE NOT TO LIFT UP
the machine by holding the UPPER PARTS. Instead, place your hands
underneath the closing plate of the machine, and lift the machine. Place the 3
little feet attached at the lower plate, precisely in the black rubber blocks.
5. Look underneath the table, and loosen the nut of the motor, with a flat key of 24.
This allows the motor to rotate upwards or downwards .
6. Push with one hand the motor upwards, and place the driving belt (attached to
the sewing machine) (M10012) around the pulley of the motor. Push the motor
down to stretch the belt slightly as seen in FIG 1.2.
FIG 1.2
7. Unscrew the cover marked “OIL” on the machine. Take the two oil bottles out of
the box and fill the machine with 1.5 L oil. Check if sufficient oil has been added
by looking at the oil-level glass. The oil level should be exactly between the two
red arrows. Close the cover again.
The electric motor is supplied, connected for use on 380V/3 PHASE supplies. For use
on 220V/3PH supplies, use the connection diagram (FIG 1.3). Connect the cores of
the mains to the receptacles of a plug designed for local operation (not included).
Verify that the direction of rotation is correct (FIG 1.1).
FIG 1.3
-----------
--------
---
--
Tightened too strongly
Well
Z Y X z y X
~ ~ f@1
bl bl bl
~
(~
~
@ @ @
w V u w V u
220 VOLT 380 VOLT
From the Library of Superior Sewing Machine & Supply LLC

TIT AN DK25OO ELECTRONIC MOTOR
ADD OIL HERE
OIL LEVEL
YARN STAND
i------------------------------.
I ·-........_
25841VSC
@a,...___
25882 ........._
2 5884 ........._
FIG 1.4
25882V I
25841E
vsET 25884
25841R
I
I T 16/12/04
2587012P
From the Library of Superior Sewing Machine & Supply LLC

b. Sewing head only
The sewing head requires a drive motor that must meet the following specifications:
motor rating¾
HP and rated load speed 2.800 rpm.
Use a pulley 80 mm in diameter to match the V belt.
Verify direction ofrotation (FIG 1.1)
Prior
to starting the sewing machine, always make sure to pour about 1,5 Iof oil into
the machine.
See previous paragraph for more information about this.
I 2. Lubricating the sewing head
Utilising splash lubrication, the sewing head is designed for optimum lubrication of all
the components concerned. To get the maximum performance, never run the
machine with oil level lower
than the minimum level line. The sight-glass allows quick
determination of
the oil level (see FIG 1.1+1.4).
ATTENTION: the machine should NEVER RUN WITHOUT OIL.
The machine will loose daily a small amount of oil. An inspection at periodical intervals
is recommended. Ifrequired, refill the oil reservoir by unscrewing the filler plug
marking OIL just above the sight-glass.
Very important: oil type SP68.
The type of oil to be used in this sewing machine should be offollowing viscosity:
SP68.
Recommended oil types: CASTROL-ALPHA SP68 or any similar oil grade.
ATTENTION: Use oflow-viscosity oils will result in poor lubrication properties and
excessive wear, which in turn will necessitate early renewal ofthe internal parts.
Conversely, use of high-viscosity oils
will lead to lines clogging, which in turn will
necessitate early renewal ofthe spare parts from lack of lubrication.
VERY IMPORTANT: OIL should be completely removed and new oil should be added
(1.5
I.) ONCE A MONTH. This is best done after a few hours of operation
Remove the plug for oil draining underneath the machine and let the oil leak in a
bucket. Replace the
plug and add new oil (1.5 I) through the plug marked OIL.
If the oil is strongly polluted, it is recommended to remove the cover underneath the
machine
and to remove all excess deposit, which has accumulated on the cover.
Change the gasket (25839J)
and close the cover. Place the machine on the table and
refill the machine with oil as described above.
From the Library of Superior Sewing Machine & Supply LLC

25900
TIT AN DK2500
THREADING DIAGRAM
DETAIL A
SCALE 2/5
25900A
25900B
SEE DETAIL A
FIG 2.1
T 07/01/2005
From the Library of Superior Sewing Machine & Supply LLC

Chapter 2: Threading
1. Types of yarns
a. Needle yarn:
Many types of yarns can be used on the machine. Good results have been obtained
with following qualities : Nylon polyamide yarn of thickness 30 or 40,
Monofil (invisible) thread of 750 denier. (0,3 mm diameter) or
cotton (for example, mercerized cotton, thickness No.18).
b. Chain yarn (or “looper yarn”):
A wide range of threads can be used with DK 2500 machines.
Good results have been obtained with following qualities:
Polypropylene and Polyamide Nylon are most frequently used in thickness ranging
from 1800 detex till 5200 detex. The threads should be very lightly twined. This
gives better results after sewing, because the thread flattens out and covers the
carpet better.
Other qualities like wool, acrylic or cotton have also been used with success.
2. Threading
Remark: always switch off the motor prior to threading the yarns!
a. Needle thread
Refer to FIG 2.1 THREADING DIAGRAM for the details.
b. Chain yarn
1. Turn the hand-wheel by hand and bring the take-up Din its topmost
position. Lead the yarn thru the tension-adjusters Aand Band by hole Cthru the
plates on both sides of the take-up D.
2. Turn the hand-wheel by hand and bring the take-up Din its bottommost
position. In this position the eye of the lower looper faces the threading tube E
3. Thoroughly clean (if necessary, using the threading needle, part 25900) the
lower looper's eye.
4. Tightly wrap the chain yarn around the point of the threading needle and push it
all the way (as far as possible) into the threading tube and through the eye of the
lower looper F.
5. Gently remove the threading needle and push some more chain yarn into the
threading tube in order to obtain a small tangle of chain yarn behind the lower
looper's eye F. REMARK: Remember : remove the THREADING NEEDLE ALWAYS.
6. Turn the flying-wheel by hand to make sure the chain yarn extends above the
needle plate.
7. Make sure the needle thread remains threaded. The sewing machine is now
ready for use.
Note: For improved covering, use two or three thinner threads in the lower
looper.
From the Library of Superior Sewing Machine & Supply LLC

TIT AN DK25OO
STITCH ADJUSTMENT LOOPER YARN
NEEDLE YARN
LOOPER YARN
CARPET
A: OK
B: NOT OK
FIG 3.1
C: NOT OK D. NOT OK
D J
C
H
FIG 3.2
FIG 3.3
FIG 3.4
IMITATION 3-THREADSTITCH
T 25/11/04
From the Library of Superior Sewing Machine & Supply LLC

Chapter 3: Stitch formation
1. Chain yarn feed
It is recommended to keep the pressure on the springs to a minimum on the thread
tensioners A, B and G(FIG 2.1).
Note:
Always make sure the chain yarn is positioned underneath the yarn drawing lever D
(or “take-up”) (see FIG. 2.1-3.2). Failure to do so, will result in improper stitch
formation. To avoid this, check if the machine has been threaded properly (see
chapter 2b).
FIG 3.1A: Correct stitch formation, the chain yarn and the needle thread have both
absolutely uniform tensions.
FIG 3.1B: Either insufficient chain yarn tension, or excessive needle thread tension
FIG 3.1C&D: Either excessive chain yarn tension, or insufficient needle thread tension
With the take-up lever Dcorrectly set, the amount of thread thus fed will assure
successful overlocking of the carpet.
In the event of insufficient thread feed (or with thicker carpets), however, undue
tension will be placed on the chain yarn along the edges of the carpets, which in turn
will pull the needle thread from the carpet backing (see figure 3.1C).
To remedy: adjust the take-up lever Dslightly in the direction of C3 (see figure 3.5).
Conversely in the event of excessive thread feed (or with thin carpets), the chain yarn
will be found to be slack around the carpet edges (see figure 3.1B).
To remedy: adjust the take-up lever Dslightly in the direction of C1 (see figure 3.5).
If the machine isn’t equipped with RFR fine adjustment gear (see figure 3.3), the
position of take-up lever Dis to be changed as follows:
Untighten the screw of the arm I(figure 3.2) and place the take-up lever Dinto the
wanted position (higher=less thread, lower=more thread) afterwards, tighten the
screw of arm I again.
RFR fine adjustment assembly: standard in the new machines (from 2004 on)
To adjust the thread feed : loosen the screw J (FIG 3.3). Push the bar (lever)
towards “+” to increase thread feed, towards “-“ to decrease thread feed.
Note: For the typical two-thread overlock stitch, insert the chain yarn in the Ceye as
illustrated in figure 3.2 and 3.3
For special stitch formation similar to a three-thread stitch (see figure 3.4), pass the
chain yarn through the H eye (see figure 3.2 and 3.3) and then adjust thread feed so
that the stitch thus formed is similar to the one shown in figure 3.4.
From the Library of Superior Sewing Machine & Supply LLC