Strobel 325-40D-TP User manual

For the professional user
Für den professionellen Anwender
Betriebsanleitung
Class:
Klasse:
Model:
Ausführung:
Dated:
Stand:
325-40D-TP
9
Operating Instructions
Spezialmaschinen GmbH

Im Zeichen der Qualität
ou nd the Strobel trademark on every Strobel
machine leaving our works. And with good reason.
This symbol is a guarantee of the high quality of
our products. Quality which creates trust – trust
in our technology, our service and, not least of all,
in our good name.
ie nden die Strobel-Schutzmarke auf jeder
Strobel-Maschine, die unser Werk verlässt.
Und das aus gutem Grund. Denn dieses Zeichen
garantiert Ihnen die hohe Qualität unserer
Produkte. Qualität, die Vertrauen schafft – in unsere
Technik, unseren Service und nicht zuletzt in unseren
guten Namen.
S
Y
The sign of quality

trobel clients know that they can expect a particularly
high standard of performance from our company and our
machines. Now you have settled for one of our products.
For us this is a source of encouragement and of obligation
to Justify your trust.
If you wish to prot from the performance and efciency of
your Strobel machine as long as possible, exact handling
and thorough care is necessary. For this reason we kindly
request that you read the operating instructions closely.
It provides all the information you need for trouble free
operation.
And if you do happen to need a spare part the enclosed
spare parts list gives a complete overview. It is clearly
classied according to components so that you can nd the
required part quickly and easily. In order to avoid errors we
request you to quote machine class, machine number and
part number completely on your spare part order.
We wish you lots of success in your work with your new
Strobel machine.
S
A decision with future
Spezialmaschinen GmbH

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Operating Instructions
STROBEL Class 325-40D-TP
Contents
1General notes on safety............................................................................................5
2General .....................................................................................................................7
2.1 Operating instructions.....................................................................................7
2.2 Class description, machine number and reference position...........................7
2.3 Machine applications......................................................................................7
2.4 Technical data................................................................................................8
3Set-up and commissioning........................................................................................9
3.1 Unpacking of the machine..............................................................................9
3.2 Setting up the machine (Fig. 1 and Fig. 2)......................................................9
3.3 Sense of rotation of the machine (Fig. 3) .....................................................12
3.4 Motor drive via toothed belt ..........................................................................12
3.4.1 Tensioning the toothed belt (Fig. 4) .................................................12
3.4.2 Positions of the machine..................................................................13
3.5 Intermediate venting (Fig. 5).........................................................................14
4Notes on usage.......................................................................................................15
4.1 Needles and threads ....................................................................................15
4.2 Inserting the needle (Fig. 6)..........................................................................15
4.3 Threading and thread course .......................................................................16
4.4 Filling the Bobbin (Fig. 7)..............................................................................17
4.4.1 Inserting bobbin and threading bobbin thread (Fig. 8) .....................17
4.5 Thread tension..............................................................................................18
4.5.1 Thread tensioning spring - needle thread (Fig. 9)............................18
4.5.2 Thread tension - bobbin thread (Fig. 10)..........................................19
4.6 Setting upper feed........................................................................................19
4.7 Setting stitch length (Fig. 7 + Fig. 11)...........................................................19
4.8 Stitch depth...................................................................................................20
4.8.1 Setting the stitch depth (Fig. 2)........................................................20
4.8.2 Digital stitch depth display (Fig. 12) .................................................21
4.8.3 Changing the battery (Fig. 12) .........................................................21
4.9 Adjusting plunger (Fig. 1)..............................................................................22
4.10 Plunger lowering (Fig. 6)...............................................................................22
4.11 Sewing drive.................................................................................................22
118.05.07
118.05.05
118.05.06

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5Operating the sewing machine................................................................................23
5.1 Switch-on......................................................................................................23
5.2 Inserting and removing material ...................................................................24
5.3 Sewing..........................................................................................................24
5.4 Problems during sewing and possible solutions...........................................25
5.5 Incorrect stitches ..........................................................................................27
6Machine maintenance.............................................................................................28
7Variable sewing tools ..............................................................................................28
8Optional extras........................................................................................................28
Subject to change with prior notice

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1 General notes on safety
Every person in charge of setting up, operating, servicing and repairing the
machine must first read and understand the operating instructions and
particularly the safety instructions before starting up the machine.
Failure to comply with the following safety instructions can lead to bodily
injury or damage to the machine.
1. The machine must only be operated by persons familiar with the relevant
operating instructions and who have been instructed accordingly.
2. Before commissioning also read the notes on safety and the operating
instructions of the sewing drive manufacturer.
3. Only use the machine in the intended manner and never without the
provided guards. Always observe the pertinent safety regulations.
4. Switch off the main switch or pull the power plug for threading, changing
the reels, exchanging sewing tools such as needle, gripper, needle plate,
transport devices, possibly cutter and cutting block, for cleaning and when
leaving the workplace as well as for maintenance.
5. General maintenance tasks may be carried out only by properly trained
persons in accordance with the operating instructions.
6. Repair work, retrofitting and maintenance may be carried out only by
technicians or specially trained personnel.
7. When servicing or repairing pneumatic equipment, the machine must be
disconnected from the pneumatic supply. Exceptions are only allowed for
adjustment work and tests of functionality performed by specially trained
technicians.
8. Only specially qualified technicians may work on the electrical equipment.
9. It is forbidden to work on electrically live components! Exemptions are
covered by the EN50110 (DIN VDE0105) regulations.
10. Any retrofitting or alterations to the machine may only be performed under
strict compliance with all pertinent safety regulations.
11. Only use our approved spare parts when servicing and/or repairing the
machine.
12. It is forbidden to operate the sewing head until it is determined that the
entire sewing unit complies with EU provisions.
13. It is essential that you observe and follow these instructions as well as the
generally valid safety regulations.

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14. Warning instructions given in the operating instructions that pertain to
especially dangerous parts of the machine must be indicated at these
positions using a safety symbol.
Warning instructions given in the operating instructions that pertain to
special injury hazards for operating personnel or technicians must be
indicated at these positions using a safety symbol.

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2 General
2.1 Operating instructions
Any person involved in the installation, operation, maintenance and repair of
the machine must have read and understood the operating instructions and
mainly the safety instructions before starting the machine.
2.2 Class description, machine number and reference position
For side-referenced descriptions, the operating side of the machine is the
starting base.
The class descriptions (type) are at the front, the machine and model number
(towards the hyphen) is located below the cover on the right side on the
housing.
2.3 Machine applications
Two thread blindstitch lockstitch machine to collapse the lining in the sleeve cap
for jackets and coats.
Very soft processing.
Adjustable upper feed dog during sewing.
See point 7 for variable sewing tools.

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2.4 Technical data
Recommanded rated speed 1300 min-1
Motor power 550 W
Toothed belt pulley/machine Z = 38
Toothed belt profile HTD 5M-9
Stitch length-upper feed 2 – 8 mm
(depend on shoulder pad)
Kind of stitch: two thread blindstitch double lockstitch
Stitch type 317
Needle system GROZ-BECKERT 1717 VRUE
Needle size 90
Thread polyester continuous filament
Thread size 80
Air pressure 6 bar
Average air consumption 25 l/h
Foot print 0.5 m x 1.1 m
Noise:
Average noise level at a speed of
n = 1300 min-1: LpAm 75 dB(A)
Noise test according to DIN 45635-48-1 KL3

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3 Set-up and commissioning
3.1 Unpacking of the machine
Strobel machines are supplied either complete as upper part only.
The cotton stand and another machine accessories are located in the
packaging.
Prior to disposing of the packing material it must be carefully checked whether
all accessories parts have been unpacked.
3.2 Setting up the machine (Fig. 1 and Fig. 2)
CAUTION! Danger of injury!
Due to pulling in of parts of clothing or hair as well as
danger of crushing of fingers!
The machine must not be operated without a guard for the
belt for the upper part and for the motor.
The upper part of the table plate must be provided with bores according to the
drawing.
Frame and pedals as well as electrical connections must be mounted according
to the printed circuit.
Screw on the motor. The electric connection must be carried out according to
the printed circuit in the enclosed operating instructions for the motor.
Screw the upper part to the table plate. (Fig. 2)
The bolts (1) and the pressure spring (2) are enclosed with the machine
accessories and must be fitted as shown in Fig. 2.
The pedal rod system must be suspended according to Fig. 1.
Push on the knee lever and secure with knurled screw. (not necessary with
pneumatic venting, see also point “8 Optional extras”

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Fig. 1

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The cotton stand is mounted at the back on the right on the table plate after
assembly of the individual parts. (Fig. 1)
Check all screws at the frame for tight fit and retighten if necessary.
Mount the position transmitter and adjust corresponding to point 3.4.2 Positions
of the machine.
Prior to commissioning the machine it must be checked
whether the electric connection data on the type plate of the
motor, especially the network voltage and the frequency,
are according to the data of your current network.
All rust prevention agents, such as Vaseline or similar, must be carefully
removed from the sewing tools prior to commissioning the machine.
Fig. 2

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3.3 Sense of rotation of the machine (Fig. 3)
The correct rotation of the hand wheel is clockwise when looking at it from the
front.
Fig. 3
3.4 Motor drive via toothed belt
3.4.1 Tensioning the toothed belt (Fig. 4)
CAUTION! Danger of injury!
To check the tension of the toothed belt, switch off the
machine electrically, pull the mains plug and ensure the
machine has actually stopped by pressing the motor pedal.
The machine must not be operated without a belt guard for
the motor.
The tension of the toothed belt should not be too great. Slight thumb pressure
should be able to push the belt through by approx. 5 mm.
A too little or too great toothed belt tension can deteriorate the positioning of the
machine and therefore impair the function sequence.
Tensioning the toothed belt (Fig. 4):
- Release upper and lower retaining screw (1), (2) at the machine upper
part.
- Pull out the motor slightly and tighten the lower retaining screw (2) slightly.
- Tension the toothed belt by swivelling the motor.
- Retighten the upper and lower retaining screw (1), (2).

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Fig. 4
3.4.2 Positions of the machine
CAUTION! Danger of injury!
Danger of pulling in parts of clothing and of hair and danger
of crushing fingers and stitching fingers with needles!
When checking positions with switched-on machine keep
fingers and hands away from moving parts.
Machine with or without pneumatic:
The machine requires a needle position and depending on the sewing drive,
possibly also a reference position.
Reference position:
The reference position must be set in such a way, that the point of the
needle in direction of the insertion stitch closes with the right (inner) edge
of the needle slide plate.
Needle position (with stop in and outside the seam:
The needle position needs to be set in such a way that when the machine
is at standstill and the lifting is open the tip of the needle points in the
direction of the right stitch and the plunger, feed dog, and presser plate
are at one level (the position is located at about 8 mm after the upper
needle turning point).
Notes for sewing drives which have two needle positions:
The needle position mentioned above is position 2 at the sewing drive.
The position 1 at the sewing drive should be set in such a way that when
the machine is at standstill the tip of the needle stands about
3 mm in the direction of the left stitch after the lower needle turning point.

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3.5 Intermediate venting (Fig. 5)
If an intermediate venting with the knee lever should become necessary with
attached pneumatic venting, it can be mounted on the shaft (1) in its usual
position.
Fig. 5

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4 Notes on usage
4.1 Needles and threads
The sewing quality can be influenced to a considerable extent by choosing the
most suitable needles and threads for the material to be sewn. It is
recommended to use controlled GROZ-BECKERT needles system 1717 VRUE
only.
The machine is supplied with size 90 needles.
NOTE:A perfect needle is of great importance for a good sewing result.
Damages of the needle point which often can be made visible under a
magnifier only may deteriorate the sewing result. Replace the needle
in time!
We recommend twisted polyester filament threads of size 80 respectively.
Because of their high strength and ability to slide, combined with a low volume
they are to be preferred over a spun thread.
Guaranteed remark!
This machine has been set and sewn off with genuine
GROZ-BECKERT needles.
No guarantee can be granted if the settings are modified
for using different needle types.
4.2 Inserting the needle (Fig. 6)
ATTENTION!
Switch off machine electrically and confirm that the
machine is really in standstill position by operating the
treadle for the motor control before changing the needle.
Otherwise danger of finger bruises and needle
throughstitches.
The curved needle shape determines its position in the needle lever. Attention
should be paid only to ensure that the needle piston is pushed to the stop in the
channel of the needle lever and that the screw (2) of the needle clamping plate
(1) is tightened well.

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Fig. 6
4.3 Threading and thread course
ATTENTION!
Danger of bodily injuries!
Switch off machine electrically and confirm that the
machine is really in standstill position by operating the
treadle for the motor control before threading.
Fig. 6 shows the correct threading by using the thread take-up.