Leister HEMTEK ST User manual

Leister Technologies AG
Galileo-Strasse 10
CH-6056 Kaegiswil/Switzerland
Tel. [phone]
Fax [phone]
www.leister.com
[email protected]
®
HEMTEK
ST
HEMTEK
K-ST
DGB F

17
Contents
GB
English Operating instructions
1. Important Safety Instructions .................................................................................................................18
1.1 Intended Use ...................................................................................................................................19
1.2 Improper Use...................................................................................................................................19
2. Technical Data........................................................................................................................................19
3. Transport ................................................................................................................................................19
4. Your HEMTEK ST / K-ST..........................................................................................................................20
4.1 Type Plate and Identification.............................................................................................................20
4.2 Scope of delivery (standard equipment) .............................................................................................20
4.3 Overview of device parts ..................................................................................................................21
5. Settings on the HEMTEK ST / K-ST.........................................................................................................23
5.1 Setting and assembling table fastening .............................................................................................23
5.2 Adjusting the guide ..........................................................................................................................24
5.3 Insulation silicone plugs (only HEMTEK ST) ........................................................................................24
5.4 Adjusting the contact pressure weight...............................................................................................25
5.5 Welding nozzle ................................................................................................................................25
6. Commissioning your HEMTEK ST / K-ST ................................................................................................27
6.1 Work environment and safety ...........................................................................................................27
6.2 Operating readiness.........................................................................................................................27
6.3 Positioning ......................................................................................................................................27
6.4 Starting the device...........................................................................................................................28
6.5 Welding Sequence...........................................................................................................................28
6.6 Finishing welding.............................................................................................................................28
6.7 Switching o the device / Maintenance .............................................................................................28
7. Quick Reference Guide HEMTEK ST / K-ST.............................................................................................29
8. Warning messages (HEMTEK ST / K-ST) ................................................................................................29
9. FAQs, causes and measures (HEMTEK ST / K-ST)..................................................................................30
10. Accessories ..........................................................................................................................................30
11. Service and Repair ...............................................................................................................................30
12. Training Course ....................................................................................................................................30
13. Warranty...............................................................................................................................................30
14. Declaration of Conformity.....................................................................................................................31
15. Disposal................................................................................................................................................31

18
1. Important Safety Instructions
Operating instructions (translation of operating instructions)
GB
Leister HEMTEK ST / K-ST
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.
In addition to the safety instructions contained in the individual chapters of these operating instructions,
the following provisions are also to be followed strictly at all times.
We congratulate you on your purchase of a HEMTEK ST / K-ST!
You have chosen a first-class hot air welder.
It was developed and produced in accordance with the very latest state of technology in the plastics-processing
industry. The device has been manufactured using premium-quality materials.
Warning
Caution
Danger to life! Before opening the device, pull the mains plug out of the socket,
because voltage-bearing components and connections will be exposed when it is
opened!
Danger of fire and explosion exists in connection with improper use of the auto-
matic welder (e.g., due to material overheating) and particularly in the vicinity of
flammable materials and explosive gases.
Risk of burning!
Do not touch heating element, nozzle and components in the immediate vicinity
of the nozzle when hot. The device should always first be allowed to cool down.
Do not point the hot air flow at people or animals!
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!
Risk of clamping injuries!
A danger of clamping injuries exists with the tilting mechanism when the hot-air
blowers swivel in and out.
Risk of entanglement!
During operation there is a risk of entanglement on the drive roller.
The nominal voltage specified on the device must match the local supply voltage.
If the network voltage fails, then the main switch and the drive must be switched
o (raise the drive roller).
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.

19
The HEMTEK ST / K-ST is designed for professional indoor utilization for welding tarpaulins.
Use only original Leister spare parts and accessories because otherwise no warranty or guarantee claims can be
asserted.
HEMTEK ST welding processes and material types:
• Hem, hemstitch and fillet welds of thermoplastic materials
• Welding widths 20, 30, 40 mm
HEMTEK K-ST welding processes and material types:
• Flap-piping-welding of thermoplastic materials
• Welding width 8 mm
Any other use or any use beyond that described is deemed as improper use.
Subject to change without prior notice.
For transporting the hot air welder two people are needed.
When working on the open system, do not wear clothing such as scarves,
shawls, or neckties. Tie up long hair or protect it by wearing headgear.
Comply with applicable national statutes regarding the carrying or lifting of loads.
The weight of your HEMTEK ST / K-ST excluding table fastening is 20 kg.
Two persons are required for transportation with the table fastening.
Caution
Protect the device from moisture and wet conditions.
HEMTEK ST
120 V
HEMTEK ST
230 V
HEMTEK K-ST
120 V
HEMTEK K-ST
230 V
Nozzle width mm 20/30/40 30/40 20 8 8
Nominal voltage V~ 120 220 – 240 220 – 240 120 220 – 240
Nominal voltage W 1 800 3 450 2 350 1 800 2 350
Frequency Hz 50 / 60 50 / 60
Temperature, stepless °C 100 – 650 100 – 650
Air volume, stepless 1 – 10 10
Drive, stepless m/min. 0,8 – 12 0,8 – 12
Emission level LpA (dB) 70 (K = 3 dB) 70 (K = 3 dB)
Dimensions (L × W × H) mm 433 × 350 × 600 433 × 350 × 600
Weight kg 27 (including table fastening) 27 (including table fastening)
Mark of conformity
Protection Class I
1.1 Intended Use
1.2 Improper Use
2. Technical Data
3. Transport

20
Example:
The model and serial number are indicated on your device's type plate (8).
Enter this information into your operating instructions and always reference this information when addressing inquiries
to our representatives or authorized Leister Service points.
Model:..............................................................................................................................................................
Serial no.:.........................................................................................................................................................
HEMTEK ST
1 × HEMTEK ST device
• Table fastening console
• HEM material guidance
• Scraper
• Silicone plugs
1 × Original operating instructions
1 × Translation of operating instructions
1 × Main catalog
1 × Folder
The hot-air blowers (1) MUST be allowed to cool down prior to transport.
Never use the carrying handle (2) on the device for transporting with a crane.
Never use the hot-air blowers (1) to lift the hot-air welding machine.
2
To lift the hot air welder by hand, use the
carrying handle (2).
HEMTEK K-ST
1 × HEMTEK K-ST device
• Table fastening console
• Flap-piping guide
1 × Original operating instructions
1 × Translation of operating instructions
1 × Main catalog
1 × Folder
4. Your HEMTEK ST / K-ST
4.1 Type Plate and Identification
4.2 Scope of delivery (standard equipment)
1

21
1. Hot-air blowers
2. Carrying handle
3. Electric lifting cylinder
4. Fixing unit hot-air blowers
5. Scraper
6. Clamping lever for table fastening feet
7. Table fastening
8. Type plate with model designation
and the series marking
9. Control panel
10. Main Switch
11. Fastening console guide
12. Clamping lever and fixing unit for guide
13. Silicone plugs (remove for piping welding)
14. Hem, open hem and piping guide
15. Drive wheel
16. Pressure wheel
17. Adjustable weight
18. Nozzle
19. Speed potentiometer
20. Drive status LED
21. Start/stop welding (identical to foot pedal)
22. Potentiometer temperature
23. Heating / cooling status LED
24. Heating on / o
25. Air volume
1
2
34
5
6
78
9101112
13
14 15 16
17
18
Fig. 1 Control panel (9) ST
HEMTEK ST
19
22
25
20
21
24
23
4.3 Overview of device parts

22
1. Hot-air blowers
2. Carrying handle
3. Electric lifting cylinder
4. Fixing unit hot-air blowers
5. Clamping lever for table fastening feet
6. Table fastening
7. Type plate with model designation
and the series marking
8. Control panel
9. Main Switch
10. Fastening console guide
11. Clamping lever and fixing unit for guide
12. Double flap-piping guide
13. Drive wheel
14. Pressure wheel
15. Adjustable weight
16. Flap-piping nozzle
17. Speed potentiometer
18. Drive status LED
19. Start/stop welding (identical to foot pedal)
20. Potentiometer temperature
21. Heating / cooling status LED
22. Heating on / o
HEMTEK K-ST
1
4
5
6
7
891011
12 13 14 15
16
17
20
18
19
22
21
Fig. 1 Control panel (9) K-ST
2
3

23
• Mount table fastening on table using
enclosed socket head bolts
(Check stability.)
• Position HEMTEK ST / K-ST on table fas-
tening. Make sure that the machine is
mounted parallelly to table fastening.
• Tighten the HEMTEK ST / K-ST using the 4
socket head bolts
• Check correct seating and stability of the
welder.
Mount HEMTEK ST / K-ST on table fastening
Clamping feet can be adjusted to the dier-
ent tables using the two socket
head screws.
Two persons are required to transport the welder.
Use only stable tables or workbenches that can support the load without tipping over.
Set table fastening
2 x socket head screws per foot
5. Settings on the HEMTEK ST / K-ST
5.1 Setting and assembling table fastening

24
Piping guide tube is only used for welding
piping. For hems and open hems, this pipe
is sealed using the silicone plugs (13).
This plug prevents hot air from being blown
through the piping guide tube.
Piping guide tube
14
13
First assemble, detach the clamping lever
in counter-clockwise direction and carefully
insert the tube. Once the desired position
has been reached, tighten the clamping
lever in clockwise direction.
The guide exhibits diverse engravings,
which serve as an adjustment aid. The
recommended basic setting depends on the
size of the nozzles.
Setting may vary depending on the material.
• Guide designation 20, 30, 40 or for entirely welded hem.
(Set to 40 mm in diagram)
• Engraving on pipe is from left to right for the basic setting 40, 30, 20 mm nozzle (only completely welded hem).
Risk of burning!
Guide may be hot after prolonged welding. The device should always first be allowed to cool down.
Clamping lever
4 × socket head screws
Engraving pipe
Engraving guide
5.2 Adjusting the guide
5.3 Insulation silicone plugs (only HEMTEK ST)

25
Shifting the weight grip can be used to
adjust the eective load of the contract
pressure wheel. Shifting the mass down-
wards reduces the contact pressure, shifting
it upwards increases it.
Contact pressure in position shown approx.
150 N.
+
-
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!
The following is the basic setting of the welding nozzles of your HEMTEK ST
B
C
A
A22 mm Distance of nozzle to drive axle
B1 mm Nozzle transition
C1 mm Height oset
A26 mm Distance to drive axis
B2 mm Nozzle overlap
C1 mm Height oset
The following is the basic setting of the welding nozzles of your HEMTEK K-ST.
5.4 Adjusting the contact pressure weight
5.5 Welding nozzle

26
To monitor, extend and retract the nozzle in cold state several times and carry out any necessary fine adjustments
if necessary. An adjustment aid is available as an accessory, article no. 157.098
Dimension (A)
Set (1 × socket head screw) and slide at the
same time with the linear drive.
Dimension (B)
Set (4 × hexagon nut)
Dimension (C)
Set (4 × socket head screws)
AB
C
horizontal
(D)
4 x combination Torx screws
(E)
Parallel drive wheel on nozzle shoe
(F)
2 x socket head screws + 4 x hexagon nut
(of dimension B)
D
E
F

27
The hot air welder should be used only in well-ventilated indoor areas.
Never use the hot air welder in explosive or readily inflammable surroundings and maintain sucient
distance from combustible materials or explosive gases at all times.
Read the material safety data sheet of the manufacturer of the material and follow that company's
instructions. Be careful not to burn the material during the welding process.
Use only stable tables or workbenches that can support the load without tipping over.
Contact the manufacturer without fail should uncertainties arise during installation or operation.
1
During work interruptions or when cooling
down, you must swivel the hot-air blowers
(1) into park position using the pedal or
pressure buttons (21).
Power supply cord and extension cable
Power plants for energy supply
The nominal voltage specified on the device (see technical data) must match the mains voltage.
When using power plants as an energy supply, please ensure that the power plants are grounded and equipped
with earth leakage circuit breakers.
For the nominal output of the power plants, the formula 2 x nominal output of the hot air welder applies.
Please note that the automatic welder is only intended to be used indoors. Ensure that all requirements from the
instruction manual for the unit are met.
Check the setting guide (14) and afterwards the basic setting of the welding nozzle (18).
Check the table fastening (7) is fastened correctly and that the work table is stable.
• Check whether the material to be welded is clean on the upper and lower sides.
• Afterwards, check whether the welding nozzle (18) and the drive/pressure roller (15/16) are clean.
• Now feed the material neatly into the guide (14) and fold the contact pressure roller (16) downwards with the
help of the weight grip (17).
• Check whether the material is positioned parallel to the welder and whether the welding nozzle (18) is easily
retracted.
6. Commissioning your HEMTEK ST / K-ST
6.1 Work environment and safety
6.2 Operating readiness
6.3 Positioning
21

28
• Once you have prepared the working area and the hot air welder in accordance with the description, connect the
hot air welder to the mains voltage.
• Switch the wedge welder on via the main switch (10).
• Define the welding parameters for drive (19), air temperature (22) and air volume (25) on the respective
potentiometer.
• Now switch on the heating [Direct heating button (24)].
• Preparing for welding
• Make sure that the welding temperature has been reached before commencing work.
The heat-up time is 3 − 5 minutes.
• Now carry out test welds in accordance with the welding instructions of the material manufacturer and/or national
standards or regulations and inspect the results. Adjust the welding profile as needed.
After the welding, actuate the foot pedal or the pressure switch (21), the motor for generating preheated air
(1) extends and the drive stops automatically.
• Use the Direct heating button (24) to switch o the heating so that the welding nozzle (18) cools down.
• The LED (23) begins flashing at the heating button.
If the device is switched o without the cooling process being adhered to, the device may become severely damaged.
No warranty or guarantee claims can be made for damage or malfunctions resulting from this.
Commencing welding
• Actuate the pressure button (21) or the foot pedal to start the welding automatically.
• The drive motor starts automatically as soon as the hot-air blowers (1) are swiveled in.
Guiding the material during the welding process
• Guide the material with a good tension during the welding process
Risk of clamping injuries!
A danger of clamping injuries exists with the tilting mechanism when the hot-air blowers swivel in
and out.
Only switch o the device with the main switch (10) when LED (23) stops flashing and disconnect
the power supply cord from the electrical network.
Wait until the device has cooled down / LED has stopped flashing. If the cooling is not adhered to, the
device may become damaged.
Check the power supply cord and plug for electrical and/or mechanical damage.
Clean the two filters of the hot-air blowers (1) and the welding nozzle (18) with a wire brush.
Risk of burning!
Do not touch heating element, nozzle and components in the immediate vicinity
of the nozzle when hot. The device should always first be allowed to cool down.
Do not point the hot air flow at people or animals!
Risk of entanglement!
During operation there is a risk of entanglement on the drive roller.
6.4 Starting the device
6.5 Welding Sequence
6.6 Finishing welding
6.7 Switching off the device / Maintenance

29
Switching on/Starting
1. Connect the mains voltage plug
2. Switch on the main switch (10)
3. Select/set the welding profile
4. Use the direct heating button (24) to switch on the
heating / wait until the operating temperature has been
reached (up to 5 min.)
5. Actuate the foot pedal or the pressure button (21), hot-
air blowers swivel in and the drive starts
Switching O
1. Actuate the foot pedal or the pressure button (21), hot-
air blowers swivel out and the drive stops
2. Use the Direct heating button (24) to switch o the heating.
3. LED (23) flashing (cooling down process)
4. LED (23) no longer flashing: Switch o the main switch (10)
5. Pull out mains voltage plug
Risk of clamping injuries!
A danger of clamping injuries exists with the tilting
mechanism when the hot-air blowers swivel in and out.
Temperature graph for 100% air volume
and 230 V nominal voltage
Message type Display Error description
Warning Both LEDs, the Status LED Drive (20)
and the Status LED Heating (23) are
flashing.
Mains frequency error
The air volume can no longer be adjusted.
Risk of entanglement!
During operation there is a risk of entanglement
on the drive roller.
Risk of burning!
Do not touch heating element, nozzle and compo-
nents in the immediate vicinity of the nozzle when hot.
The device should always first be allowed to cool down.
Do not point the hot air flow at people or animals!
7. Quick Reference Guide HEMTEK ST / K-ST
8. Warning messages (HEMTEK ST / K-ST)

30
Deficient quality welding result:
• Check drive speed, welding temperature and air volume.
• Clean welding nozzle (18) with wire brush (see chapter 6.7 Switch off device/maintenance).
• Welding nozzle (18) set incorrectly (see chapter 5.1 welding nozzle).
• Guide (14) set incorrectly (see chapter 5.2 Adjusting the guide)
After 5 minutes at the most, the set welding temperature has still not been reached:
• Inspect mains voltage.
• Reduce air volume.
Welding medium is not guided straight:
• Guide (14) set incorrectly (see chapter 5.2 Adjusting the guide).
• Welding nozzle (18) set incorrectly (see chapter 5.1 welding nozzle).
• Table fastening (7) is not mounted parallelly to HEMTEK ST / K-ST.
(see chapter 5.1 Setting and assembling table fastening)
• Guiding the material well by hand.
Use only original Leister spare parts and accessories because otherwise no warranty or guarantee claims can
be asserted.
You can find more information at www.leister.com.
Repairs shall be assigned exclusively to authorized Leister Service points.
Leister Service points guarantee a professional and reliable repair service with original spare parts in accordance
with circuit diagrams and spare parts lists. You will find the address of your authorized service center on the last
page.
You can find more information at www.leister.com.
Leister Technologies AG and its authorized service points oer welding courses and introductory training classes.
You can find more information at www.leister.com.
• The guarantee or warranty rights granted for this device by the direct distribution partner/salesperson apply from
the date of purchase.
• In the event of a guarantee or warranty claim (verification by invoice or delivery note), manufacturing or processing
errors will be rectified by the sales partner through replacement delivery or repair.
• Other guarantee or warranty claims are excluded within the framework of mandatory law.
• Damages resulting from natural wear, overload, or improper handling are excluded from the warranty.
• Heating elements shall be excluded from warranty obligations or guarantees.
• No guarantee or warranty claims exist for devices which have been converted or changed by the purchaser or for
which non-original Leister spare parts have been used.
9. FAQs, causes and measures (HEMTEK ST / K-ST)
10. Accessories
11. Service and Repair
12. Training Course
13. Warranty

31
Never dispose of electrical equipment with household refuse.
Electrical equipment, accessories and packagings should be subjected to environmentally friendly
recycling.
Leister Technologies AG, Galileo-Strasse 10, CH-6056 Kägiswil, Switzerland confirms that in the model made
available for purchase, this product fulfills the requirements of the following EU directives.
Guidelines: 2006/42, 2014/30, 2014/35, 2011/65
Harmonized standards: EN 12100, EN 55014-1, EN 55014-2, EN 61000-6-2, EN 61000-3-2,
EN 61000-3-3, EN 62233, EN 60335-1, EN 60335-2-45, EN 50581
Name of the
authorized document official: Volker Pohl, Manager Product Conformity
Kaegiswil, 6/22/2017
Bruno von Wyl, CTO Christoph Baumgartner, GM
14. Declaration of Conformity
15. Disposal

Your authorised Service Centre is:
Leister Technologies AG
Galileo-Strasse 10
CH-6056 Kaegiswil/Switzerland
Tel. [phone]
Fax [phone]
www.leister.com
[email protected]
© Copyright by Leister
BA HEMTEK ST / K-ST / 11.2016 / 05.2018 Art. 157.872
®