Lampert DENTA PUK User manual

OPERATING INSTRUCTIONS
“DENTA PUK”
Dear customer!
The manual that you hold in your hands is designed to acquaint you with the operating
principles and correct maintenance of your “DENTA PUK”.
Please read this manual carefully and clearly observe the guidelines it describes; this way
malfunctions and operating errors can be avoided. Adhering to the guidelines will promote
the working life of the machine and assure that it remains in constant operational
readiness during this time; it will also ensure your personal safety.
This device may only be operated by qualified personnel, and then only for its
designated use and in accordance with the guidelines contained in this manual. The
manufacturer accepts no responsibility, and is in no way liable for damage caused
by improper use or operation of the machine.
Before first using your “DENTA PUK”, please be sure to carefully read the manual
sections “General Safety Requirements” and “Personal safety”.
Please retain these instructions for future reference.
A note on conformity marks
The equipment made by “Lampert Werktechnik GmbH”, fulfils the conformity requirements
of CE certification and is manufactured according to VDE guidelines.
The DENTA PUK is certified as “BG-PRÜFZERT” by the German federation of statutory
accident insurance institutions for the industrial sector, and carries the “GS” safety
standards certification mark.
When overhauling or reconditioning our devices, we strongly advise to use original parts
only. Our customer service team is at your disposal, and will gladly assist in any way they
can.
The device may only be opened, or alterations carried out, by authorised customer
service technicians. Noncompliance will result in all warrantees and liability claims
becoming void.
LAMPERT WERKTECHNIK GMBH
October 2009

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TABLE OF CONTENTS
SECTION
A
SAFETY NOTICES AND TERMINOLOGY USED 3
1
DESIGNATED USE 3
2
INTRODUCTION 3
3
SAFETY INSTRUCTIONS
3-1
General safety instructions 4
3-2
Personal safety and potential risks 5
4
INSTALLATION
4-1
Setup guidelines 5
4-2
Controls, functions and features -front 6
4-3
Controls, functions and features -back 7
4-4
Starting up 7-9
4-5
Changing language displayed 9
5
OPERATING PRINCIPLES AND SETTING THE PARAMETERS 9
5-1
Adjusting the welding parameters 10
5-2
Using the programmable memory 11
6
INSTRUCTIONS FOR USE
6-1
Welding instructions 12
6-2
Welding with the foot switch (optional accessory) 13
6-3
Working with the adapter cable for welding pins (Ø 1,3 mm) 14
6-4
Tips and general pointers 14
6-5
Sharpening the electrodes 15
6-6
Care and maintenance 15
7
TECHNICAL DATA
7-1
Technical information 16
7-2
Identification plate – explanation of picture symbols 16
8
TROUBLE SHOOTING 17
9
SPARE PARTS LIST 18
10
DISPOSAL INFORMATION 19
11
EG-CONFORMITY DECLARATION 19

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A SAFETY NOTICES AND TERMINOLOGY USED
Warning!
“Warning!” Denotes a potentially dangerous situation. Failure to comply with these
notices can result in serious injury or even death.
Caution!
“Caution!” These notices show a situation that can result in minor injury or damage to
property if not complied with.
Please note!
“Please note!” Points out situations where ignoring the safety notice can negatively
affect the result of work being carried out and damage the equipment.
Important!
“Important!” Notices are helpful hints and other particularly useful pieces of information.
They do not indicate a potentially dangerous or harmful situation.
1 DESIGNATED USE
Applying welds to all common dental alloys and titanium, for work associated with the
repairing or manufacturing of dental appliances for patients. It is prohibited to use this
apparatus to carry out welds in or on the body.
Any other application of the appliance other than the above stated is prohibited.
It is prohibited to use this apparatus out of doors. Use only in dry surroundings!
No liability of any kind will be assumed for the durability of welds. We recommend
that welds are always inspected.
2 INTRODUCTION
The DENTA PUK is as an excellent way of bringing the technique of welding to a broad
band of users in the dental industry, whilst at the same time keeping running costs and
the initial outlay to a minimum.
Thanks to a clever combination of high performance electronics and precision
mechanics, we’ve been able to create a unique micro-welding device.
The DENTA PUK is small in size, low in weight and consumes only a minimum of
energy. These are not just important facts, but also very beneficial attributes. Its
excellent ignition and welding characteristics permit a broad spectrum of applications
and a wide range of uses.
By bringing new possibilities to the world of welding engineering, entirely new dimensions
are available to those producing or repairing dental appliances.

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3 SAFETY INSTRUCTIONS
3-1 GENERAL SAFETY INSTRUCTIONS
The device may only be opened by a trained and qualified technician or electrician.
Before opening the device, remove the mains plug from the wall socket, and make sure
that the machine is not receiving any electrical current. Discharge any of the machines
components which contain and store an electrical charge.
Should any questions arise, please always consult a trained professional.
Our customer service team is naturally also always at your service; staffed with a
competent, professionally trained workforce, they have the necessary resources and
equipment at their disposal and would be pleased to assist you further wherever
necessary.
Always use original cables of sufficient length and make sure that the clamp holding the
work piece is properly and securely attached.
The risk of hazards may arise from welding current as well as from mains electricity.
When carrying out repair or servicing work, the machine must always be disconnected
from the power supply. Throughout any work of longer duration, that requires the
qualified person to leave (even if only briefly) the place where work is being carried out,
the wall socket must also be securely closed off.
The highest, and therefore most dangerous voltage in the welding circuit, is the open
circuit voltage. The maximum permissible open circuit voltage is laid down by national
and international regulations. This differs depending on the type of welding current, the
type of power source, and the potential for electrical hazard of the workplace.
If it can be assumed that a safe operation of the device is no longer possible, the
machine must be shut down and removed from the power supply; it must also be
secured against accidental re-operation or activation.
It is likely, and can be expected, that a safe operation of the device is no longer possible
when:
- The machine shows visible signs of damage.
- Malfunctions or faults occur.
- The machine will not operate.
Please observe the appropriate safety measures when handling gas bottles and the
safety rules in dealing with gases.
In its standard serialised form, the DENTA PUK must be run on a mains voltage of
230V~.
The wiring of the mains power supply plug is as follows: yellow-green lead = equipment
grounding conductor (PE). The other two leads L1 and N, are connected to the Phase
und Neutral terminals of the plug.
Since the launch of the Euro Norm IEC 38 (valid from May 1987), the mains voltage is
defined Europe-wide as 230V.
The welding device is set ex works, to run on 230V!
This means that the equipment can, because of the tolerance range of +/-15%, also be
run on a mains power of 220V~. Machines that have been “factory set” to run on a
voltage other than 230V are specially labelled with an appropriate sticker.
THE DEVICE MAY ONLY BE OPENED BY AUTHORIZED PERSONNEL!
IF THE DEVICE HAS BEEN MADE FOR A VOLTAGE OTHER THAN THE STANDARD
VOLTAGE OF 230V~, THEN THE TECHNICAL DATA INDICATED ON THE
IDENTIFICATION PLATE IS APPLICABLE! MAINS PLUGS MUST CORRESPOND
WITH THE MAINS VOLTAGE AND THE CURRENT CONSUMPTION OF
THE WELDING DEVICE. (See the technical data!)
ALWAYS USE FUSE THAT IS APROPRIATE AND SUITABLE FOR THE MACHINES
CURRENT CONSUMPTION.
USE ONLY THE POWER CORDS PROVIDED!

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3-2 PERSONAL SAFETY AND POTENTIAL RISKS
When welding it is preferable to wear protective gloves on both hands, as it cannot be
completely ruled out that sparks and splashes occur during welding. The protective
gloves may not contain high proportions of quickly melting synthetic fibres. Protective
gloves also guard against UV-rays which are harmful during prolonged periods of
intensive welding.
Wear appropriate clothing with no synthetics.
The work piece and electrode tip can become extremely hot during welding, bringing a
possible risk of burns.
The point of the electrode, when clamped into the hand piece, signifies a risk of injury.
(Wounds caused by piercing or scratching of the hand, face, eyes, etc….).
Do not look into the arc without adequate eye protection. Only use a welders’
protective glare shield that contains a protective glass which conforms to
regulations (protection class 11, minimum).
The electric arc radiates rays of heat and light that can cause the user to be burned or
dazzled. In Addition to this, the arc also gives off UV-radiation. If the eyes are not
adequately protected, these invisible ultraviolet rays can cause a very painful
conjunctivitis, the effects of which are only noticeable several hours after exposure.
Those lingering or working in close proximity to the electric arc, must be made aware of
the risks, and supplied with the appropriate protective equipment. Wherever necessary, a
protective screen should be erected.
When welding, especially in confined spaces, always make sure that there is enough
fresh air, as smoke and harmful gases are produced.
Because of the danger of explosions, no welding may be carried out on any containers
that have previously held gasses, fuels, petroleum, mineral oils or similar; even if these
have been standing empty for a prolonged period.
Specific regulations apply in high fire-risk and explosion-risk rooms or areas.
DANGER FROM SHIELDING-GAS CYLINDERS
When handling gas cylinders, always abide by the appropriate safety regulations.
In particular, gas bottles are to be safeguarded and secured so that they can neither
topple over nor fall off anything. In addition they are to be protected against thermal
shock so that they cannot heat up to above 50°C or are subjected to severe frost. A
prolonged contact to the suns rays is also to be avoided.
4 INSTALLATION
4-1 SET-UP GUIDELINES
The device is to be placed so that cooling air can freely circulate and reach all surfaces
of the machine.
The device must not be covered!
Always place the machine on a hard, insulating and non-combustible base material.
No metal dust, that may occur or accumulate (e.g. during abrasion work), may be
allowed to enter the machine.

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4-2 CONTROLS, FUNCTIONS AND FEATURES - FRONT
(Fig. 1)
1 2 3 4
6 5
(1) BUTTON-PROGRAM MEMORY
(2) BUTTON-SWITCHING MODES
(3) ROTARY KNOB-IMPULSE LENGTH / WELDING TIME
(4) ROTARY KNOB-WELDING POWER
(5) SOCKET FOR THE HANDPIECE (-pole )
(6) SOCKET ( + pole)
For connecting accessories designed to complete the electrical circuit (i.e. crocodile clip,
or other connecting cables)
LCD-DISPLAY
(7)
(8)
(9)
(10)
(7) Power in percent (%)
(8) Impulse length (welding time) in Milliseconds (ms)
(9) Current mode setting: Standard mode / Pulse welding mode / Soft welding mode / Pin
welding mode / Micro mode
(10) Program indicator P1-P10 (P1-P5 are pre-programmed at the factory)
The foot switch function can be recognised by this symbol ↓. The foot switch itself is an
optional accessory.
Please note: In the following cases the machine will switch automatically to its standby
setting after 2 minutes:
- If no weld has taken place during this time.
- If the machine has not been otherwise operated or the parameters changed during
this time.
Whilst on standby, only 1 of the blue “Power” LEDs will light.
To switch the machine again to its operational mode, activate any one of the controls, or
complete the electrical circuit (contact the electrode with a work piece that is connected
via the crocodile clip). Once done, the machine is then instantly usable again and is
ready to work.

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4-3 CONTROLS, FUNCTIONS AND FEATURES - BACK
(Fig. 2)
11 12
15
19 14
18
13 17
16
(11) MAINS POWER SWITCH
(12) I.E.C. POWER CONNECTOR
For connecting the mains power cable
(13) CONNECTION SOCKET FOR GLARE PROTECTION SYSTEM (“Shutter / Welding
Shield”)
(14) CONNECTION SOCKET FOR FOOT SWITCH (“Foot Switch”)
(15) CONNECTION SOCKET FOR LED MICROSCOPE LIGHTING (“LED-Lamp 800 mA”)
Please note: The connection sockets for the foot switch, the glare protection
system and the LED microscope lighting are identical!
(16) CONNECTOR FOR INERT GAS HOOKUP (“ARGON GAS”)
For pressure hose Ø 6 mm
(17) IDENTIFICATION PLATE
(18) FUSE TRAY (“Fuse”)
(19) SERIAL NUMBER
4-4 SETUP INSTRUCTIONS AND COMMENCING WORK
Setup:
The machine is always to be placed on a hard, insulating and non-combustible base
material, ideally on a work bench.
Push the connector plug of the hand-piece as straight as possible into the socket (5) and
by turning it to the right, carefully tighten the plug. (Hand tight only).
Insert the connector of the terminal clamp being used (i.e. crocodile clip) into its socket (6).

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Inserting the electrode:
Before changing the electrode, please check and make sure that the machine is switched
off. The uncontrolled triggering of a welding impulse can hereby be avoided.
(Fig. 3) (Fig. 4)
Remove the argon nozzle (22) from the hand-piece (25) by twisting it in opposite
(alternate) directions, and gently pulling.
Unscrew the clamping nut (24), and insert a freshly sharpened tungsten electrode (23),
then tighten the clamping nut. (Hand tight only).
UNDER NO CIRCUMSTANCES IS A SPANNER TO BE USED TO TIGHTEN THE
CLAMPING NUT.
Ideally, the electrode should protrude 4 - 6mm out of the nozzle (when replaced). (Fig. 4)
(Only use original, Thorium oxide free, electrodes).
Now replace the argon nozzle again.
Please note!
Argon nozzle (22), clamping nut (24), collet and electrodes (23) are all wear parts
(spare parts), and are therefore not covered by our warranty.
Connecting the glare protection system:
The round plug for the shutter (glare protection system “welding microscope SMD”) is
inserted into the socket marked “Shutter / Welding Shield” (13) on the back of the machine,
and with aid of the nut, tightened. (Hand tight only).
Caution!
Only the Lampert-glare protection system “welding microscope SMD” may be
connected to the DENTA PUK.
Other glare protection systems are not permitted and can result in permanent health
damage or lead to the damaging of the machine.
Please note!
Before starting to weld, always check to make sure that the eye-protecting filter
(Shutter) is functioning correctly.
By pressing in the rotary knob power (4), the eye protecting filter will change from
its clear setting (Luminescence DIN3) to its dark setting (Obscurity DIN11) and back
again when released.
Should the eye protecting filter (shutter) not change from its light to dark setting,
then it must be immediately replaced before any further work is carried out.
Connecting the gas supply:
Mount the flowmeter regulator to the bottle of inert gas, observing hereby the enclosed
instruction manual. (Wherever possible, use Argon with a purity of 99,99% i.e. “Argon 4,6“.
Mount the pressure hose to the quick coupling pieces on the flowmeter regulator, and the
connector for inert gas on the back of the machine (16); fasten these (Hand tight only).
Only use original pressure hose – supplied.
Check all the pressure hose connections to ensure that they are all secure and there
are no gas leaks.
When all is correctly connected, open the valve on the gas bottle, and set the pressure on
the flowmeter regulator to ca. 2litres per minute.
To fine tune the flow rate to the correct amount 2litres per minute, please see part 5 of
these instructions below.

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The maximum operating pressure is 4 bar!
Please note!
The DENTA PUK will only work when hooked up to a supply
of inert gas and only when the machine is receiving enough
pressure (ca. 2 litres/min).
If inert gas is not hooked up, not flowing or if the pressure is
too low, the display will show the following reading: “Gas
error!! Please check the gas pressure”.
Connecting the power supply:
Insert the mains power cable into I.E.C power connector (12), and
insert the plug into the mains power socket.
Switch the mains power switch (11) to “ON”. The display will show
the following important safety warning “Warning! Protect your
eyes! Read the manual! Follow the advice!”
Confirm the compliance with these safety instructions, by pressing
any button. Following this, the machine will run a self-test.
Please note!
Please also follow the guidelines given in the operating
instructions of the attached welding microscope “SMD”!
Caution!
As soon as the mains power switch is switched to “ON”, the
terminal clamp (i.e. crocodile clip) and cables receive
electrical current. Please see to it that these items cannot
come into contact with any electrically conducting or earthed
materials. For the user / operator there is no danger, but
unwanted operating errors can occur.
4-5 CHANGING LANGUAGE DISPLAYED:
Languages available: ENGLISH – ITALIAN – SPANISH – FRENCH – GERMAN
The machine can be changed from English to run in any of the 4 other languages
mentioned above.
Switch the machine on and confirm the safety notice displayed, so that the device starts
and is ready for work.
Now press both the “Mode“ button (2) and the rotary-knob “Power“ (4), holding
them pressed for 2 seconds.
The language setting has now been changed to the next language in sequence.
By repeating this process, the various languages available can be selected one after the
other.
5 OPERATING PRINCIPLES AND SETTING THE PARAMETERS
After being switched on and running the self-test, the machine will start from its initial
settings:
Standard mode, 7 ms impulse length/welding time, and a low power setting.
The initial settings for mode, welding time and power, correspond to the blue LEDs in the
display. The display also has blue LEDs to mark the entire parameter range.

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Important !
At the outset, until a basic proficiency is reached, we recommend to only change the
parameter welding power, leaving the welding time constant. After a short time, when
you have become more confident with the technique and have gained more experience,
then you can naturally also change the welding time to suit your needs.
The machine automatically saves the last three sets of welding parameters that
have been used.
By pressing in the rotary knob “Impulse length / welding time” (3), these previous settings
can be recalled one after another.
Even when the machine is switched on, or after accidentally changing the parameters,
the settings that were last used are there to be recalled again.
Please note !
Please remember that only when the gas flow rate has been correctly set up and
adjusted, can good welding results be achieved.
To adjust the gas flow to the correct amount, press in and hold the rotary knob – welding
power (4). (The gas valve in the machine will now be open and the gas flowing freely).
Without letting go of the rotary knob welding power (4), adjust the flowmeter regulator to
the correct flow rate ca. 2litres per minute.
5-1 SETTING THE WELDING PARAMETERS
Power:
The welding power (potency of the welding energy), can be set by adjusting
the rotary knob – welding power (4)
The size and intensity of the welding spot can thus be governed.
Welding time:
Using the rotary knob – Impulse length / welding time (3), the user can
regulate for how many milliseconds the welding energy impacts upon the work
piece.
Depending on the angle at which the electrode is held in relation to the work
piece, the penetration depth and direction of flow (of molten metals), can be
influenced.
The penetration depth is at its greatest when the electrode is held vertically to
the work piece.
A description of the welding modes:
Standard mode
Welding time 4-30ms, Power 20-100%
Our all-round program for many different applications.
Pulse welding mode
Welding time 4-30ms, Power 20-100%
Possible uses: grooves or joints, the inner surface of crowns, joints in tight
angles on model cast dilatations, small cavities.