Strobel 141-23EV User manual

For the professional user
Für den professionellen Anwender
Mechanikeranleitung
Class:
Klasse:
Model:
Ausführung:
Machine number:
Maschinen-Nr.:
Dated:
Stand:
Spezialmaschinen GmbH
Mechanic‘s Instructions
141-23EV Ausf. 10
141-30 Ausf. 6
141-40 Ausf. 7
141-50 Ausf. 3
142-30 Ausf. 6
142-40 Ausf. 5

Im Zeichen der Qualität
ou nd the Strobel trademark on every Strobel
machine leaving our works. And with good reason.
This symbol is a guaranteen 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 particu-
larly 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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Mechanic’s instructions
STROBEL Classes 141-23EV, -30, -40, -50, 142-30, -40
Contents
1General notes on safety............................................................................................5
2General .....................................................................................................................7
2.1 Operating instructions.....................................................................................7
2.2 Class identification, serial number and orientation of the machine.................7
2.3 Range of application and intended use..........................................................7
2.4 Technical Data................................................................................................9
2.5 Brief setting instructions ...............................................................................10
3Disassemble the machine.......................................................................................11
3.1 Disassemble the main shaft (Fig. 1 and Fig. 2)............................................11
4Assemble the Machine............................................................................................13
4.1 Mount the shaft (Fig. 1) ................................................................................13
4.2 Mount stitch regulating eccentric 353.0031..................................................13
4.3 Adjust stitch regulating bolt 137.0014 for stitch adjustment..........................15
4.4 Adjust needle- and feed motion....................................................................15
4.5 Looper motion...............................................................................................16
4.5.1 Adjust the looper motion..................................................................16
4.5.2 Adjust the looper eccentric (on single thread machines)..................17
4.5.3 Adjust the looper eccentric (on two tread machines) .......................17
4.5.4 Adjust the front crank.......................................................................18
4.5.5 Set the looper in its front position to the feed cup............................19
4.5.6 Adjust stroke of loop ........................................................................19
4.5.7 Adjust the front bearing block...........................................................19
4.5.7.1 Basic dimensions for front and rear bearing block...........19
4.5.8 Adjust the rear bearing block ...........................................................20
4.6 Adjust height of rear feed cups.....................................................................20
4.7 Mount the front feed cup ..............................................................................20
4.8 Length adjustment of bar 133.0851 between stitch regulation rod and free
wheeling .......................................................................................................20
4.9 Thread lifting mechanism at needle bar head ..............................................20
4.10 Spring tension at feed cup support arm 333.0114........................................21
4.10.1 Plate arm lifting ................................................................................21
4.11 Needle setting...............................................................................................22
4.11.1 Adjusting needle height (Fig. 10 and Fig. 11)...................................22
4.12 Chaniging the looper ....................................................................................23
4.13 Maintenance.................................................................................................24
4.14 General Data................................................................................................24
218.05.10

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5Notes on repair and adjustment..............................................................................27
5.1 Transport plate assembly.............................................................................27
5.2 Exchanging the transport plate.....................................................................27
5.3 Mounting and setting instructions for STROBEL gathering device No.
314.0399 ......................................................................................................28

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Appendix
Circuit diagrams
Connecting the sewing machine:
259.00.16 Pneumatic circuit diagram Cl. 142
259.10.16 Pneumatic construction circuit diagram Cl. 142
Connecting digital display:
258.21.27 Electric connection diagram Cl. 141 – digital display
Subject to change without prior notice

4 MA_141_142_A10-6-7-3-6-5_130617_en

5 MA_141_142_A10-6-7-3-6-5_130617_en
1General notes on safety
The non-compliance with the following notes on safety can lead to bodily
injuries or to damages of 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. The machine must only be operated according to its designation and not
without the appropriate guards; all explicit safety regulations must also be
observed.
4. For threading, for changing the reels, for exchanging sewing tools such as
needles, grippers, stitch plate, transport devices, if necessary cutter and
cutting block, for cleaning, when leaving the workplace and for
maintenance work, switch off main switch or pull mains plug. With a
mechanically operated coupling motor without activation lock, wait until the
motor has stopped.
5. General maintenance work must only be carried out by appropriately
instructed persons in accordance with the operating instructions.
6. Repair, modification and maintenance work must only be carried out by
qualified staff or by appropriately instructed persons.
7. During maintenance and repair work at pneumatic devices, the machine
must be disconnected from the pneumatic supply network. Exceptions are
only admissible during adjusting work and function test by appropriately
instructed qualified staff.
8. Work at the electrical equipment must only be carried out by qualified
staff.
9. Work at parts and devices under voltage is not allowed. Exceptions are
regulated by the regulation EN50110 (DIN VDE0105).
10. Modification or alteration at the machine must only be undertaken under
consideration of all explicit safety regulations.
11. Only spare parts released by us for use are to be used during repairs.
12. The commissioning of the upper part is prohibited until it has been
determined that the entire sewing unit complies with the regulations of the
EC guidelines.

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13. Warning notes in the operating instructions of the machine, which point
out special points of danger, are marked at the appropriate positions with
the safety symbol.
Warning notes in the operating instructions of the machine which point out
special dangers of injury for operating or qualified staff, are marked at the
appropriate positions with the symbol
It is essential that you observe and follow these notes as well as the
generally valid safety regulations.

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2General
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. Please open the
illustrations at the beginning of these operating instructions, so you can follow
the illustrations step by step while reading the instructions.
2.2 Class identification, serial number and orientation of the
machine
The operating side of the machine is the basis for descriptions referring to
sides. The class identification (type) as well as serial and model number (after
the dash) are located below the left handwheel. These data are also shown on
the front page of the operation instructions.
2.3 Range of application and intended use
Class 141-23EV
Single Thread Overseaming Machine with gathering device for sewing insoles
to uppers of heavy weight textile and leather shoes up to total thickness
of 7 mm.
With appropriate optional features also suitable for "string lasting" and
California processing.
Class 141-30
Single Thread Overseaming Machine for sewing fur facings, heavy furs such
as lambskin, imitated furs and polishing wheels.
Class 141-40
High Speed Single Thread Overseaming Machine for fine fur stranding (let-out)
and general sewing operations.
Class 141-50
High Speed Single Thread Overseaming Machine for very fine stranding
(let-out) operations at fur.

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Class 142-30
Two Thread Cup Seaming Machine for sewing and overedging soft rubber
foam. Material thickness compressed state up to 4 mm. Also suitable for
clothing quilts and for decorative stitches of fur and leather garments.
Special version Class 142-30N
Two Thread Cup Seaming Machine for sewing of coated material for diving and
surfing suits (e.g. neoprene) for material thickness of 4 – 7 mm.
Class 142-40
Two Thread Cup Seaming Machine for sewing and overedging soft rubber
foam. Material thickness compressed state up to 2 mm. Also suitable for
clothing quilts and for decorative stitches of fur and leather garments.

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2.4 Technical Data
141-23EV 141-30 141-40 141-50 142-30 142-30N 142-40
Number of stitches
Max mechanically admissible min-1
Recommended rated speed min
-1
2300
1800
2800
2300
4200
3600
2800
2300
2800
2400
Machine pulley diameter
Machine
dw 80
V-belt profile
10 x 6 mm
Stitch length (adjustable in mm)
3 - 6.5
3 - 6
0.6 - 2.5
3 - 6
1 - 4
Kind of stitch: Overseam
Single thread
Two thread
Needle system
134
459R
1738
Needle size
140
110 -
130
40 - 120
90, 100
55
Recommended thread
Twisted Polyester filament
Recommended thread size
40 - 20
50 -
10
130 - 80
40 - 10
40 - 20
120/2
Stitch type
501
502
Kind of feed
Back plate transport
Pneumatic connection
10 bar
Operating pressure
5 - 6 bar
Required space
0.6 x 1.06 m
Noise:
Average noise level at a speed
of number of stitches n min
-1
LpAm
73 dB
1800
LpAm
84 dB
2300
LpAm
85 dB
3200
LpAm
76 dB
2300

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2.5 Brief setting instructions
Setting data
Class
141-23EV
141-30
141-40
141-50
142-30
142-30N
142-40
A
Stitch length
3 - 6.5
3 - 6
0.7 - 2.7
0.6 -2.5
2.3 – 5.3
1 - 4
B
Stroke of loop
4.7
4.5 - 5
3.5
3.5
4.2
4.5
C
Needle point front
measured from cup
edge
22.6 20.5 18.5 16.8 18.8 17
L Looper height
inclusive shaft 37 30.5 31.5 30.8 28.3 31
H
Looper front position
measured from cup
edge
11.5 8.2 7.5 5.5 11.5 9.7
K
Looper movement
9.5
9
5.3
4.8
8.2
6.7
H + J Total looper travel 17.7 12.7 11 10.1 12.5 11.3
F
Looper movement to
the right from needle
center to looper point
5.5 3 4.2 3.2 2.8 5.9
The clearence between the feed cups amount 12 – 14 mm.

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3Disassemble the machine
3.1 Disassemble the main shaft (Fig. 1 and Fig. 2)
Before disassembling the main shaft, it is advisable to mark the exact position
of each part or screw, and to take the measures of both bearing support blocks
by means of a gauge, measuring from the front edge of the machine column.
(Measures a + b).
This will save you a lot of time when you assemble and adjust the machine.
(Fig. 1)
Not until now should the screws of the parts attached to the shaft be loosened
and the right handwheel be removed and the shaft, too, be pushed out to the
left by a withdrawal device.
Loosen the screws of the parts. Take off the right hand wheel. Pull the shaft
about 20 to 30 mm to the left and remove the remaining glue without displacing
the ball bearings. Then take off shaft.
The left handwheel with the stitch-regulating eccentric bolt does not need to be
removed. Be sure that the set screws 176.0632 located on both sides of the
regulating eccentric bolt (A) 132.0074 are removed; on machines that were built
before 1986, the screws 176.0620, 176.0619, and the setbolts 135.0078.
(Fig. 1 and Fig. 2)
NOTE! If not done yet, mark the position of guide disc 153.0031 and
regulating eccentric 132.0074.
The remaining glue can easily be removed from the shaft by using a cleanser,
e. g. Clorothene.
258.21.27
258.21.27
258.21.27
258.21.27

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Fig. 1
Fig. 2

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4Assemble the Machine
4.1 Mount the shaft (Fig. 1)
First, remove any grease from the shaft. Mount the parts in correct order onto
the shaft and put it into the machine column so that it sticks out about 30 mm
on the left. Then put a drop of “Loctite” on either end of the shaft, that is, on the
left end sticking out from the column, and on the ball bearing on the right.
(Loctite, Kapillar 290)
NOTE! The surfaces to be joined must be absolutely clean. Only then
you may fit the shaft completely into the machine column. Turn
it slightly, so that the glue on the ball bearing is evenly
absorbed. Fix stitch regulating eccentric (A) (fig.1).
See chapter “4.2 Mount stitch regulating eccentric 353.0031”.
Push the shaft to the left up to the stop, and fasten setting ring
246.0103 on the right of the shaft in order to eliminate any axial
play.
About an hour later when the glue (Loctite, Kapillar 260) is hard, you may
continue to assemble and adjust the machine. When assembling after a repair,
it is not necessary to take off the left hand wheel.
4.2 Mount stitch regulating eccentric 353.0031
Fit the left handwheel onto the shaft so that the first screw in direction of sewing
fits into the drill hole on the left of the shaft and point upwards.
Turn guide disc 153.0031 so that you can easily slide down set eccentric
132.0074. Then screw the first screw 176.0632 into the regulating eccentric, but
ensure that regulating bolt 137.0026 can still freely be turned in the shaft. Then
turn hand wheel with shaft by 180 degrees. Screw second screw 176.0532 into
the regulating eccentric right to the stop. Fasten guide disc 153.0031.
Push the shaft to the left up to the ball bearing, slide set collar 246.0103 on the
right shaft side all the way to the ball bearings, and tighten. The shaft is now
fastened.
Let stitch-regulating eccentric 137.0014 level out and tighten.
Fix two lubricated springs 161.0063 and bolts 135.0062 into the drill hole of the
hand wheel (Fig. 2, Fig. 3 und Fig. 4).

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Fig. 3
Fig. 4
Screw knob 344.0089 onto regulating bolt 137.0026 until it touches the hand
wheel. Then hold the knob while screwing out the regulating bolt until index
124.0080 stops at the knob (mark 5) long stitch, (Fig. 4) and easily visible
between handwheel and stand.
When properly adjusted, you can easily turn the regulation knob from the fixed
stop “long stitch” to the fixed stop “short stitch”.
Regulating eccentric 132.0074 must be set to the upper dead point, the index at
the hand wheel to mark 5. Finally, screw in lock nut 179.0614. (Fig. 4)

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4.3 Adjust stitch regulating bolt 137.0014 for stitch adjustment
Eccentric (A) 353.0031 (Fig. 1) and bolt (B) 137.0014 (Fig. 4) have to be
adjusted to the specific stitch length required for each machine (See chart).
Make sure that wing 223.0045 and rod 120.0082 are correctly set. Bolt
137.0014 must be mounted with the grain mark facing upwards because this
mark indicates the stitch length; in other words, it moves - in direction of arrow -
to the right (-) when at its smallest, and to the left (+) when the longest stitch is
being formed. (Fig. 4 and Fig. 5)
4.4 Adjust needle- and feed motion
If the machine is set to produce the longest stitch (see chart), the feed motion
stops when the point of the needle placed approx. 1.5 mm within the cup edge
before penetrating the fabric.
The feed motion starts when the needle is placed approx. 1 mm behind the cup
edge.
Needle- and feed motion are adjusted at needle bar eccentric (E) (Fig. 1), note
the foremost needle position (table).
When adjusting the needle bar, make sure that the needle clamp device at the
needle bar head stands exactly rectangular to the rear feed cup.
Fig. 5

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4.5 Looper motion
The looper motion is determined by the stroke of the looper eccentric (F)
(Fig. 1 and Fig. 6), by the crank distance, and by the distance between drill
holes in the clamp lever. These parts are different for each machine class. The
looper motion must start and end at the same time as the needle bar motion.
The lateral looper movement is determined by the control cam and must be in
accordance with the needle motion.
The looper shaft must be mounted exactly in the center of the needle bar.
We recommend to fit the parts onto the shaft so that they can still be moved,
and to fasten them tightly only after the final adjustment.
4.5.1 Adjust the looper motion
Mark the upper dead point of needle bar eccentric (E) (Position 1).
Find and mark the top dead centre of the needle bar eccentric (equals position
"1"). (E)
The top dead centre of the needle bar eccentric is equal to the bottom dead
centre of the gripper eccentric offset by 180° (see chapter “4.5.2 Adjust the
looper eccentric (on single thread machines)”).
In this position, turn the control cam until the looper – moving to the right –
takes up the loop and reaches the turning point.
Make sure that a play of approx. 1 mm remains between control cam and
setting ring at the looper shaft, because a lateral displacement of the cam also
influences the looper movement.
If the distance is enlarged, the deflection of the gripper to the right is reduced.
The total path of the gripper hardly changes.