Leister SEAMTEK 900 AT User manual

Leister Technologies AG
Galileo-Strasse 10
CH-6056 Kaegiswil/Switzerland
Tel. [phone]
Fax [phone]
www.leister.com
[email protected]
®
SEAMTEK
900 AT
GB

2
GB
English Operating instructions 4
Contents
1. SEAMTEK 900 AT......................................................................................................................................................... 4
1.1 Using this Manual ............................................................................................................................................... 4
2. Overview of Important Safety Instructions .................................................................................................................. 5
2.1 Important Safety Instructions ............................................................................................................................... 5
2.2 Intended Use ...................................................................................................................................................... 6
2.2.1 Welding Vapors....................................................................................................................................... 6
2.2.2 Extraction ............................................................................................................................................... 6
2.3 Improper Use...................................................................................................................................................... 6
2.4 Operating Modes ................................................................................................................................................ 6
2.5 Specialists and Training....................................................................................................................................... 6
3. Technical Data............................................................................................................................................................. 7
4. Transport and Commissioning..................................................................................................................................... 7
4.1 Delivery.............................................................................................................................................................. 7
4.2 Unloading the Machine from the Transport Crate .................................................................................................. 7
4.3 Transportation on the Customer’s Premises.......................................................................................................... 7
4.4 Moving the Machine outside of the Company’s Premises....................................................................................... 8
4.5 Work Environment............................................................................................................................................... 8
4.6 Workplace and Workplace Environment................................................................................................................ 8
4.7 Securely Positioning the Machine......................................................................................................................... 9
4.8 Commissioning the Machine................................................................................................................................ 9
4.8.1 Power Supply.......................................................................................................................................... 9
4.9 Connecting the Compressed-Air Supply.............................................................................................................. 10
5. Your SEAMTEK 900 AT............................................................................................................................................... 10
5.1 Type Plate and Identification .............................................................................................................................. 10
5.2 Scope of Delivery (standard model in transport box) ............................................................................................ 10
6. Overview of Machine Elements ................................................................................................................................. 11
6.1 Front View........................................................................................................................................................ 11
6.2 Back View ........................................................................................................................................................ 12
6.3 Outlets ............................................................................................................................................................. 12
6.4 Optional Accessories......................................................................................................................................... 12
6.4.1 Sidearm................................................................................................................................................ 12
6.4.2 Quickarm.............................................................................................................................................. 13
6.4.3 Tape Delivery System ............................................................................................................................ 13
7. Operation and Operating Elements............................................................................................................................ 13
7.1 Welding Nozzle ................................................................................................................................................. 13
7.1.1 Adjusting the Position of the Welding Nozzle ........................................................................................... 13
7.1.2 Welding Nozzle Position and Heat Input .................................................................................................. 14
7.1.3 Changing the Welding Nozzle................................................................................................................. 15
7.1.4 Low-Flow.............................................................................................................................................. 15
7.1.5 Risk of Burning ..................................................................................................................................... 15
7.1.6 Air Outlet.............................................................................................................................................. 16
7.2 Touch Panel Operating Unit ............................................................................................................................... 16
7.3 Emergency Stop Push-Button ............................................................................................................................ 16
7.4 Emergency Stop Switch..................................................................................................................................... 17
7.5 USB Connection................................................................................................................................................ 17
7.6 Main Switch ..................................................................................................................................................... 17
7.7 Feet ................................................................................................................................................................. 18
7.8 Pedal Unit......................................................................................................................................................... 18
7.9 3 bar Pressure Reducing Valve .......................................................................................................................... 18

3
7.10 Welding Arm Options (P, S, Q), Arm Replacement............................................................................................... 19
7.10.1 Changing the Arm................................................................................................................................. 19
7.10.2 Pedestal ............................................................................................................................................... 19
7.10.3 Quickarm.............................................................................................................................................. 20
7.10.4 Sidearm................................................................................................................................................ 20
7.11 Transport Rollers............................................................................................................................................... 21
7.11.1 Changing the Transport Rollers .............................................................................................................. 21
7.12 Guide Holder..................................................................................................................................................... 22
7.12.1 Mounting and Adjusting the Guide.......................................................................................................... 23
8. The Seamtek 900 AT Control Panel ........................................................................................................................... 23
8.1 Start screen...................................................................................................................................................... 23
8.2 Home............................................................................................................................................................... 23
8.3 Tab for Changing Views..................................................................................................................................... 24
8.4 Welding parameters.......................................................................................................................................... 25
8.5 Periphery.......................................................................................................................................................... 26
8.6 User................................................................................................................................................................. 27
8.7 Machine Settings .............................................................................................................................................. 29
8.8 Formulas.......................................................................................................................................................... 30
8.9 Test Mode........................................................................................................................................................ 31
8.10 Add-Ons Screen ............................................................................................................................................... 32
8.11 Information....................................................................................................................................................... 32
9. Welding Sequence and Tips ...................................................................................................................................... 33
9.1 Welding Sequence ............................................................................................................................................ 33
9.2 Tips for a Better Weld Result ............................................................................................................................. 33
10. Seamtek 900 AT Warning and Error Messages ....................................................................................................... 34
10.1 Error Levels ...................................................................................................................................................... 34
10.2 Error List .......................................................................................................................................................... 34
11. Frequently Asked Questions.................................................................................................................................... 37
12. Maintenance............................................................................................................................................................ 38
12.1 Machine Fault................................................................................................................................................... 45
13. Accessories ............................................................................................................................................................. 45
14. Add-ons ................................................................................................................................................................... 45
14.1 Monitoring........................................................................................................................................................ 45
14.1.1 Monitoring the Welding Parameters........................................................................................................ 46
14.1.2 Temperature......................................................................................................................................... 46
14.1.3 Air Volume............................................................................................................................................ 46
14.1.4 Operating Hours Counter ....................................................................................................................... 47
15. Service and Repair .................................................................................................................................................. 47
16. Training Course ....................................................................................................................................................... 47
17. Warranty.................................................................................................................................................................. 47
18. Declaration of Conformity........................................................................................................................................ 48
19. Disposal................................................................................................................................................................... 48
20. Quick Reference Guide ............................................................................................................................................ 48
20.1 Switching on/Starting........................................................................................................................................ 48
20.2 Switching O.................................................................................................................................................... 48
21. Appendix.................................................................................................................................................................. 49

4
Operating instructions (translation of original operating instructions)
GB
Leister SEAMTEK 900 AT
Automatic welder
Read through the operating instructions before commissioning.
Always store these operating instructions at the device.
Do not pass the device on to other personnel without the operating instructions.
Thank you for selecting the world's best hot-air rotation welding device. The SEAMTEK 900 AT is a computer-controlled hot-air
welding device that is used for joining laminated industrial textiles, e.g., polyvinyl chloride (PVC), polyurethane (PU), polyethylene (PE),
and polypropylene (PP). Today, these are used for a multitude of important and interesting products, including 3D applications, tents,
tarpaulins, inflatable objects, geomembranes, truck tarpaulins, coverings for the agricultural sector, fishing equipment, protective
clothing, protective covers, pipes, synthetic leather, and lots more. The possibilities are practically unlimited.
This document describes how to assemble and operate the SEAMTEK 900 AT. The device is manufactured by Leister Technologies
AG in Kägiswil, Switzerland. It describes the setup, installation, operating sequences, nature, and tasks of the various modules that are
available for using your SEAMTEK 900 AT. This documentation also comprises a list outlining troubleshooting tips as well as warranty
information, and a table of contents. This manual is intended to ensure that the SEAMTEX 900 AT is installed and operated in a proper
manner. Please read through all of the sections in this manual carefully before using your SEAMTEK 900 AT.
This version invalidates any versions created at an earlier date. It will in turn also lose its validity as manuals with later dates
appear.
Leister Technologies AG makes every eort to ensure that the information contained in this manual is complete and exact.
No guarantee, neither concrete nor implied, is however provided, nor is any liability assumed for the use of this information with
respect to either its completeness or accuracy.
This manual may be updated from time to time without prior notice. The latest version of all operating instructions published
by Leister Technologies AG can be obtained by authorized users upon request to Leister Technologies AG.
1. SEAMTEK 900 AT
We would like to congratulate you on having purchased a Seamtek 900 AT!
You have chosen first-class hot-air welding device.
It was developed and produced in accordance with the latest advances in the plastics-processing industry. The device has been
manufactured using premium-quality materials.
1.1 Using this Manual

5
Warning
Danger to life, high voltage! Before opening the device, pull the mains plug out of the socket, because volt-
age-bearing components and connections will be exposed when it is opened!
Danger of fire caused by improper use of the welding machine (e.g., material overheating) and particularly in
the vicinity of combustible materials!
Risk of burning!
Do not touch heating element tube and nozzle when they are hot. The device should always first be allowed to
cool down!
Connect the device to a socket with a protective conductor! Any interruption of the protective conductor
inside or outside of the device is dangerous!
Use extension cables with protective conductors exclusively!
Danger of poisoning! Gases are released during the processing of plastics, lacquers or similar materials that
could be aggressive or toxic. Avoid breathing in vapors, even if they seem to be harmless. Make sure the work-
place is well-ventilated at all times or wear a breathing mask.
Danger of crushing! When the nozzle is retracted, there is a risk of crushing because of pneumatically moving
parts. Make sure that no part of the body are trapped when changing the arms.
Risk of entanglement!
Do not reach between moving parts, e.g., transport rollers, in order to avoid any risk of objects being pulled in.
Danger: At least two people are needed to safely remove the machine from the wooden crate.Make sure
that the machine does not topple over.
Caution
The nominal voltage specified on the device must match the local supply voltage. If the supply voltage fails,
the main switch and the drive must be switched o.
To use the device, a FI safety switch is required to protect the personnel working at the site where the device
is being used.
The device must be monitored continuously during operation! Waste heat can come into contact with
flammable materials that are not in view.
Device may be operated only by trained specialists or under their supervision. Children are not permitted to
operate the equipment under any circumstances.
Protect the device from moisture and wet conditions.
When working on the open system, do not wear such articles of clothing as scarves, shawls, or neckties.
Tie up long hair or protect it by wearing headgear.
Depending on the configuration of the machine (nozzle width, nozzle setting, air volume) and the welding
material used, the machine may reach a critical volume level. You and any people in the vicinity must wear
suitable hearing protection in the course of this.
2. Overview of Important Safety Instructions
2.1 Important Safety Instructions

6
Make sure to use the correct welding parameters. When redetermining the welding parameters, start with a low temperature
and increase the temperature until you achieve a good weld result. Make sure that the weld materials are not burnt in order to
reduce the welding vapors produced. As an accessory, Leister oers an adapter for the SEAMTEK 900 AT, which can easily be
mounted on an external vacuum device. Please ask your distribution partner about this.
2.2 Intended Use
Danger: Welding certain materials can result in the formation of poisonous vapors. You must therefore
ensure that enclosed rooms are well-ventilated. If this is not possible, the welding vapors must be extracted
by suction.
The Seamtek 900 AT has been designed for the professional welding of thermoplastics.
Use only Original Leister spare parts and accessories since otherwise, no warranty or guarantee claims can be asserted.
Any other use or any use beyond that described is deemed as improper use.
2.2.1 Welding Vapors
2.3 Improper Use
The vacuum device (Leister accessory 155.410) is supplied without an extraction unit. Therefore, Leister recommends the following
unit properties.
The extracted air can be filtered with an internal filter unit. The internal unit must be equipped with a multi-stage filter combination to
filter gases and smoke.
If the extracted air is not filtered internally, the exhaust gases can also be conducted out of the building. We recommend the Leister
Airpack (119.358) as an external blow-o unit. Local laws and regulations must be observed for this purpose.
Volume flow (20 °C) 234 m³/h (68 °F) 138 cfm
Hose connection 90 mm 3.54“
2.2.2 Extraction
• Normal operation: In this mode, the machine welds material. The machine can be used in manual, automatic, and semi-au-
tomatic operation.
• Setup operation: Everything must be set up first in order to prepare the machine for normal operation. This is done in the setup
operation mode.
• Maintenance/Service/Installation: In this mode, the machine is not in operation. The machine must be disconnected from
the power and pneumatic supply before performing the relevant tasks.
• Operators: The personnel responsible for setting up, operating, and cleaning the machine are defined as operators.
These personnel are obliged to carefully read the operating instructions and to observe the safety instructions contained therein.
In addition, the operators are instructed by the administrators on how to operate the machine.
• Administrator: The personnel responsible for the repair, maintenance, installation, and adjustment of the machine are defined
as administrators. These personnel are trained extensively by Leister Technologies AG or by a representative instructed to do so.
These personnel are obliged to carefully read the operating instructions and to observe the safety instructions contained therein.
• Specialists: Responsible for correctly connecting the machine. The specialists must have received electronic or electrical training.
These personnel are obliged to carefully read the operating instructions and to observe the safety instructions contained therein.
2.4 Operating Modes
2.5 Specialists and Training

7
Seamtek 900 AT
Nominal voltage V~ 230/240 (US)
Frequency Hz 50/60 (US)
Nominal current A 20
Nominal voltage W 4,500
Temperature °C 120 – 700
Maximum temperature °C 700
Airflow range l/min 80 – 170
Drive speed m/min 0 – 30
Electronics PC panel with PLC
Blowers Volumetric flow controlled
Rotary vane pump
Maximum roller clamping force N 600
Weld seam width mm 8 – 64
Emission level LpA (dB) ≈78
Dimensions of machine (L × W × H) mm 1,500 × 702 × 1,500
Dimensions of packaging (L × W × H) mm 1,760 × 926 × 1,536
Weight of machine kg approx. 238 kg (basic version)
approx. 268 kg (fully equipped)
Weight of packaging kg 145
Mark of conformity
Protection Class I
Subject to change without prior notice.
3. Technical Data
4.1 Delivery
Do not use a crane or other similar equipment to lift the machine.
The Seamtek AT 900 is delivered packaged and well-protected in a transport crate. When moving the
machine in the transport crate, pay attention to the symbols for the center of gravity.
4.2 Unloading the Machine from the Transport Crate
Danger: At least two people are needed to safely remove the machine from the wooden crate.Make sure
that the machine does not topple over.
Turn the feet (6) upward until the stop to ensure maximum floor clearance.
4. Transport and Commissioning
To safely unload the machine from the transport crate, we recommend consulting the video tutorial available. Please ask your
distribution partner for this.
1. Remove the front cover of the wooden crate. This cover can also be used as a ramp.
2. Position the front cover as a ramp in front of the wooden crate and secure the ramp.
3. Then detach all wooden transport securing devices.
4. Turn all four feet (6) upward as far as possible.
5. Using the moving wheel, turn the machine outwards.
6. Slowly move the machine out of the wooden crate. While doing so, make sure that the machine cannot topple over.
4.3 Transportation on the Customer’s Premises
Danger: Allow the machine to suciently cool down prior to being transported.
(See cool-down mode, Chapter 8.5)

8
To move the machine to the desired location on the respective company’s premises, the feet (6) must be turned upward as far
as possible until there is no longer any contact with the floor and the machine rests on the floor with all three wheels.
• Do not place the machine in the vicinity of sources that cause significant vibrations; this may be other machines, in the vicinity
of the road, or other similar entities.
• To ensure access around the machine, an unobstructed working area of at least 1 m must be available around the machine.
• Depending on the function, the AHAM (13) swings back and forth. Ensure that persons and objects maintain an adequate
distance.
Only move the well-secured machine in the transport box provided for this purpose.
4.4 Moving the Machine outside of the Company’s Premises
Danger: Never use the Seamtek 900 AT in readily inflammable surroundings and maintain a sucient dis-
tance from combustible materials or explosive gases at all times!
The hot-air welding machine must only be used in well-ventilated rooms.
4.5 Work Environment
The Seamtek 900AT has rollers on its frame, which allow the machine to be moved easily to a dierent location. Please make sure
that the required space for the machine is maintained, and that the adjustable feet are locked into place whenever the machine has
been moved.
The working area may exceed the marked area.
Pay particular attention to the safety distance. A distance of 200 mm must be maintained, as the hot air nozzle unit swings out-
ward. Warm air is blown out of the back of the machine. The distance to the wall must therefore be observed.
4.6 Workplace and Workplace Environment
ARequired space for the machine 2380 × 1530 mm
BWorking area 1350 × 840 mm
CSafety distance 540 × 200 mm
DDistance to the wall 2380 × 250 mm
ERequired space for the service doors 700 × 670 mm
A
B
C
D
E

9
The machine must be placed on an even substrate.
Turn all four feet (6) downward (anticlockwise
direction of rotation) until the machine equally rests
on all feet (6) and is suitably and securely posi-
tioned. Use a spirit level to align the machine.
Check the machine for damage before commissioning.
Power Supply Connector Plug
The Seamtek 900 AT is supplied without a connector plug. Connect a plug that guarantees the specifications of the machine
and complies with all statutory requirements specified in the respective country.
The following specifications regarding the current source and the connector plug must be observed.
4.7 Securely Positioning the Machine
6
4.8 Commissioning the Machine
4.8.1 Power Supply
The machine must only be operated at an altitude of up to max. 2,000 m above sea level. We cannot guarantee that the machi-
ne will function properly if it is used at a higher altitude.
Furthermore, ensure that the machine is only operated in conditions with a maximum humidity of 95% and a maximum tempe-
rature of 45 °C. Individual components of the machine may no longer function properly if it is still used above these limits.
The operator should work in front of the machine on a height-adjustable chair. This allows the operating personnel to correctly
view the welding point and therefore prevents postural problems.
The machine must always be used with gloves to protect against the hot
temperatures.
Connection Plug
The machine must be connected to a residual current circuit breaker. Residual current protection devices prevent dangerously
high ground currents and help reduce the number of life-threatening electrical accidents.
Nominal voltage V 230– 240
Frequency Hz 50/ 60
Nominal current A 20
Power supply cord and extension cable
• The nominal voltage specified on the device must match the supply voltage.
• The cable for the power connection for the machine (22) must be freely movable and must not impede users or third parties
during work (tripping hazard) see picture 6.2.
• The extension cables must be permitted for the utilization site and be marked accordingly. Take into account the necessary
minimum cross-section for extension cables as required.

10
Connect a suitable compressed air cable to the
compressed air connection (19) and connect
the cable to a source that supplies a minimum
of 8 bar. Set the compressed air controller
to 6.5 bar.
The Seamtek is supplied with a quick coupling(19)
but not a hose connector. Use an in-house hose
connector with an external thread of R/Rc ¼".
Screw this connector into the internal thread of
the quick coupling (19). Connect the in-house
hose to the hose connector. Now connect the
hose to a compressed air source that supplies
a minimum of 6.5 bar (94psi) and a maximum
of 10bar (145psi). Inspect the pressure at the
pressure gage within the pneumatic-system
cabinet (26). Adjust the pressure with the hand
wheel as necessary.
4.9 Connecting the Compressed-Air Supply
19
5.1 Type Plate and Identification
5. Your SEAMTEK 900 AT
The type designation and serial number are specified on the type plate on your device.
Transfer this information to your operating instructions; in the event of any inquiries
to our representatives or authorized Leister service center, please always refer to this
information.
Article no.:
Serial no.:
5.2 Scope of Delivery (standard model in transport box)
1 x Seamtek AT 900 2 x 25 mm steel rollers, mounted
1 x pedestal, mounted 1 x connection cable (without plug)
1 x quickarm, optionally mounted (optional accessory) 2 x key for switch cabinet
1 x sidearm, optionally mounted (optional accessory) 1 x operating manual
1 x tape delivery system, optionally mounted (optional accessory) 1 x wiring diagram
1 x 25 mm nozzle, mounted
Connection cable
International (230 V):
Function
USA (240 V):
Function
Wire colors
Connection cable
Machine
brown L1 (230V AC) L1 (120V AC)
light blue N L2 (120V AC)
yellow/green PE PE

11
6. Overview of Machine Elements
6.1 Front View
1. Adjusting screws for nozzle position (Chapter 7.1)
2. Touch panel (Chapter 7.2)
3. Emergency stop button (Chapter 7.3)
4. USB connection (Chapter 7.4)
5. Main switch (Chapter 7.5)
6. Feet (Chapter 7.6)
7. Pedal unit (Chapter 7.7)
8. Welding arm (pedestal) (Chapter 7.8)
9. Transport rollers (Chapter 7.9)
10. Upper pressure roller (upper wheel module, UWM)
11. Guide holder (Chapter 7.10)
12. Welding nozzle (Chapter 7.1)
13. Adjustable hot air module
1
23
45
6
7
8
10
12
13
11
9

12
6.2 Back View
6.4 Optional Accessories
6.4.1 Sidearm
This additional welding arm is particularly
suitable for welding on covers for inflatable pipes
and bags.
The machine can be equipped with the
sidearm (27) in two dierent ways. The
sidearm (27) is either fitted to the machine
directly by Leister or mounted on the machine
afterwards by the customer.
6.3 Outlets
The outlets (15 and 20) on the machine are only approved for use with Leister accessories. The electrical connection is
supplied with mains voltage. Leister is not liable for any non-approved use.
14. Ethernet output for accessory A
15. Electrical connection for accessory A
16. Compressed air connection for accessory A
17. Air line to heating element
18. Electrical connection for heating element
19. Compressed air connection for
machine supply
20. Electrical connection for accessory B
21. Ethernet output for accessory B
22. Power connection for machine
23. Suspension equipment
for pedal
24. Heating element for
protective pipe
25. Switch cabinet
26. Pneumatic cabinet
27
14
15
19
20
21
22
23
25
26
16
17
18
24

13
7.1 Welding Nozzle
7.1.1 Adjusting the Position of the Welding Nozzle
6.4.2 Quickarm
6.4.3 Tape Delivery System
7. Operation and Operating Elements
This accessory enables the production of endless
pipes and hoses.
The machine can be equipped with the
quickarm (28) in two dierent ways. The
quickarm (28) is either fitted to the machine
directly by Leister or mounted on the machine
afterwards by the customer.
The tape delivery system (29) is suitable for
supplying tape during the joining process. The
system is primarily used for sealing (taping)
seams and gluing (bonding) non-weldable
materials.
The machine can be equipped with the tape
delivery system in two dierent ways. The tape
delivery system is either fitted to the machine
directly by Leister or mounted on the machine
afterwards by the customer.
Before making any adjustments, screw the nozzle as far as possible from the transport rollers (9) in
order to prevent collisions.
Danger of crushing! When the nozzle is retracted, there is a risk of crushing because of pneumatically mo-
ving parts.
Depending on the configuration of the machine (nozzle width, nozzle setting, air volume) and the welding
material used, the machine may reach a critical volume level. You and any people in the vicinity must wear
suitable hearing protection in the course of this.
28
29
29

14
Z Direction
Turn the adjusting screw (Z) in direction (+Z),
to position the welding nozzle (12) higher and
in direction (-Z), to position the nozzle lower.
Lock the adjusting screw (Z) in place with the
clamping lever.
Y Direction
Turn the adjusting screw (Y) in direction (-Y),
to move the welding nozzle (12) away from the
rollers and in direction (+Y), to move the nozzle
in the direction of the rollers. Lock the adjusting
screw (Y) in place with the clamping lever.
X Direction
Turn the adjusting screw in direction (-X), to
move the welding nozzle (12) to the left and in
direction (+X), to move the nozzle to the right.
Lock the adjusting screw (X) in place with the
clamping lever.
Now set the welding nozzle (12) to the welding position under the “welding conditions” tab (set everything to “Automatic” mode).
Each time an arm, the transport rollers (9), or welding nozzle (12) are changed, the position of the nozzle must be sub-
sequently readjusted. Before readjusting the welding nozzle (12), remove the mounted guide, where applicable. Turn the
welding nozzle (12) in the starting position as far as possible away from the machine to ensure that the welding nozzle (12)
does not collide with the machine when swiveling into position.
Slightly tighten the clamping lever for the positioning screws once the
welding nozzle (12) has been adjusted. Initiate Start Weld to check that
the welding nozzle (12) does not come into contact with anything when
swiveling in and out. Adjust the angle of the nozzle as necessary.
The closer the welding nozzle (12) is to the
transport rollers, the higher the energy entry
is in the welding zone, or rather the adjustable
welding temperature will be lower for the same
weld result.
The welding nozzle (12) must be positioned at
a sucient distance from the welding zone to
ensure contact-free [no direct contact with the
welding nozzle (12)] material supply.
Adjust the welding nozzle (12) such that mini-
mal noise emissions occur.
7.1.2 Welding Nozzle Position and Heat Input
Z
-Z
+Z
Y
-Y
+Y
X
+X -X
9
12
Warmer Colder
12 12

15
7.1.3 Changing the Welding Nozzle
7.1.5 Risk of Burning
Then detach the nut (12 A) with an 11/16 inch
open-end wrench. The welding nozzle (12) can
now be removed. Handle the welding nozzle (12)
carefully so as not to damage the air output
opening. Then mount the desired welding
nozzle (12) and securely tighten it.
Caution: Completely cool the machine with the cool-down mode before changing the welding nozzle (12).
The welding nozzle (12) may still be hot even following the cool-down mode.
A 25 mm welding nozzle (12) is mounted as standard. Nozzles are available in widths from 8– 64 mm.
Before mounting a new welding nozzle (12), use adjusting screw (Y) to turn the welding nozzle (12) as far as possible away
from the machine in direction (-Y). Before changing the welding nozzle (12), allow the machine to completely cool down.
The Seamtek 900 AT is a hot-air welding
machine. Depending on the respective process,
some components can become incredibly hot.
Always operate the machine with due caution.
Danger: The welding nozzle (12), heating
element pipe, and the heating element protec-
tive pipe (24) can be very hot during operation.
There is a risk of burning when touching these
elements. Never touch one of these components
while the machine is operating. These elements
may still be warm even following the cool-down
mode.
Hot air is discharged through a bypass when low-
flow nozzles are used.
Hot air may escape from the end of the bypass
in the process. Make sure that no one is in the
hazard zone.
7.1.4 Low-Flow
24
12
12 A
12

16
7.3 Emergency Stop Push-Button
Pressing the emergency stop button (3)
completely shuts down the machine in an instant.
Caution: As the machine does not execute the cool-down mode when the emergency stop button (3) has
been pressed, the stop button must only be used in emergencies. The service life of the heating element is
significantly reduced if it forgoes the cooling-down process.
7.2 Touch Panel Operating Unit
The touch panel (2) can be used to see current
operating statuses as well as to edit all welding
parameters. Before operating the touch panel,
carefully read through Chapters 7 and 9.
Caution: Only use your fingers to operate the touch panel. Do not use non-authorized objects such as pens
and tools in order to avoid damaging the touch panel (2).
7.1.6 Air Outlet
Air from the pump that is not required in the machine is discharged from the machine via a bypass. This is why hot air can
escape from the back of the machine. (Refer to the figure for residual air outlet)
In addition, warm air can be blown out of the machine from the cooling air outlet (see figure), which is required to cool the
pneumatic cabinet.
Cooling air inlet
Cooling air outlet
Residual air outlet
2
3

17
7.5 USB Connection
Use the USB connection (4), to externally
backup your saved formulas or to use the
formulas on several Seamtek 900 AT machines
at the same time.
Turn the main switch (5), to start the machine
or completely switch o the machine following
cool-down mode. Prior to extended interruptions,
always switch o the machine using the main
switch (5).
Caution: As the machine does not execute the cool-down mode if it is switched o via the main switch (5),
this switch must only be activated following the cool-down process. The service life of the heating element is
significantly reduced if it forgoes the cooling-down process.
7.6 Main Switch
The following occurs as soon as you press this switch:
1. The machine is disconnected from the power supply. The heating element and the pump are switched o.
Caution: If the emergency stop switch is activated while the heating element is switched on, this can cause considerable
damage to the machine. Therefore, make sure that the machine is switched on again as soon as possible, otherwise the
heating element can be damaged. As soon as the machine is switched on again, it automatically activates the cooling
process. This means that the pump is restarted.
2. The compressed air is disconnected from the main line. The cylinders cannot be used. The pressure is not released in all
of the cylinders.
3. The machine is switched o. All the accessory components connected to the machine are also deactivated.
Restarting the machine:
1. The machine can be switched on by turning the emergency stop switch.
2. The machine restarts as soon as the emergency stop switch is released. This enables the power and compressed air supply.
3. The accessories are set to their initial state.
7.4 Emergency Stop Switch
5
4

18
7.8 Pedal Unit
The pedal unit (7) enables you to position the
material as both hands remain free as well as
to start and stop the welding process. Using the
left-hand pedal (7A), you can lift the upper
roller in order to position the material. You can
start and stop the welding process with the
right-hand pedal (7 B).
Danger: Take care not to confuse the two ped-
als (7 A + 7 B) of the pedal unit – particularly
if you want to position the material and inadver-
tently start the welding process. This can result in
burns to the hands.
Orientate yourself at the separating wall between
the two pedals (7 A + 7 B).
7.7 Feet
Turn the feet (6) clockwise (seen from above),
to turn the feet downward and turn the feet
anticlockwise, to turn the feet upward. Ensure
that the machine is suitably and securely
positioned before it is commissioned.
7.9 3 bar Pressure Reducing Valve
Compressed air cylinders are used to move the AHAM. For this purpose, a pressure reducing valve has been installed in
the pneumatic cabinet. This is preset to max. 3 bar. The reduced pressure helps prevent serious injuries when the AHAM is
swiveled in.
Caution: Do not remove the cover sheet.
Do not adjust the pressure. This can lead to injuries when the AHAM is swiveled in. In addition, the machine
is also worn down more quickly.
7 A
7 B 7
6

19
7.10 Welding Arm Options (P, S, Q), Arm Replacement
7.10.1 Changing the Arm
7.10.2 Pedestal
Deactivating the Pedestal
Press the button for the retaining pin (8 B),
which holds together the threaded rod (8 A) and
pedestal, to disengage the lock. Then pull the pin
out while firmly holding the pedestal. Carefully lay
the pedestal down. Reinsert the retaining pin so
as not to lose it. Now switch to the quickarm or
sidearm.
To bring the pedestal into the welding position,
lift the pedestal (8) upward and insert the
retaining pin (8 B) by pressing the button until
it is positioned correctly.
Caution:
Always hold the pedestal (8) when you detach the retaining pin (8 B). Then carefully lay the pedestal down.
If the pedestal falls downward unchecked, it may sustain irreparable damage.
When folding down the pedal, be mindful of a possible crushing risk and do not keep any parts of your body
between the contact surface and pedestal.
To make replacements between the individual arms, please set all settings to “Manual” and “O” in advance. The transport
rollers (9) are now open and the welding nozzle (12) is in the starting position.
Switch o the motor and select the arm in which you are replacing the:
Pedestal (P) see Chapter 7.8.2 / Sidearm (S) see Chapter 7.8.4 / Quickarm (Q) see Chapter 7.8.3
Caution: To select the active arm, the motor icon (M) must be switched o. Make sure that the correct arm
is selected to prevent damage to the drive.
Danger of crushing! When the nozzle is retracted, there is a risk of crushing because of pneumatically mo-
ving parts. Make sure that no part of the body are trapped when changing the arms.
8 B
8
8 A
P
S
Q
M

20
7.10.3 Quickarm
7.10.4 Sidearm
Activating the Quickarm
Deactivating the Quickarm
Activating the Sidearm
Make sure that the upper transport roller (9)
is open.
(See point 7.8.1)
Pull the upper retaining pin (28 A) out, to
disengage the locking mechanism for the
quickarm (28). Now carefully fold the arm
downward and fit the lower retaining pin (28 B)
until it fully engages.
Pull the lower retaining pin (28 B) out, to disen-
gage the locking mechanism of the quickarm (28).
Now fold the arm upward into the upper position
and insert the upper retaining pin (28 A) until it
completely engages.
Swivel the sidearm (27) upward and screw the
quick release (27 A) in tight.
28 A
28
28 A
27 A
27
28 B
28 B
28