stayer CITYWORK 160 Instructions D'emploi page 30

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Special adjustments for CEL XP, PFC, S250DV, S400T and
POTENZA 200 PULSED series (Fig. 6, 7, 9, 11 and 12)
In order to maximize the adaptation, manual adjustments are
offered for professional welders:
Nº2: HOT START manual control
Regulates the initial power increase when starting the arc (prime).
Adjust the control depending on the electrode kind, joint type and
the temperature of the workpiece. Begin on the medium position
and look for a start, avoiding stuck electrodes and projections. If
stuck electrodes, increase the power turning the control to the
right. In case of projections, reduce the power turning the control
to the left.
If you are going to use the unit as TIG welding, low the control to
the minimum.
Nº3: ARC FORCE manual control
Regulates the arc behaviour when a voltage dynamic fall is
produced. Depending on the electrode type, initially adjust:
- To the minimum (completely to the right) for acid rutile electrodes
(Ex. E6013)
- To the middle for basic electrodes (Ex. E7018)
- To the maximum for cellulosic electrodes (Ex. E6010)
Nº4: Amperage manual control
Standard welding amperes regulation. Look at the previous
section for details.
Nº5: A/V selector
Makes the display 1 to show the welding amperes or voltage.
Nº6: VRD selector
Makes no-load voltage standard or reduced under special
conditions where necessary.
Nº7: Amperage remote control. Plug here the cable
connector.
GRID / GENERATOR
Arc priming adaptative response (only in PFC series). The
selector 6 allows the equipment usage in very low power
generators when choosing the 'GENERATOR' position. While in
'GRID' position, the connection will be to the standard power grid
by the power supply company, achieving a light improvement of
the arc priming dynamic during the first half-second of use
Progress 1700 XP special adjustment
Use the button 8 in order to select the parameters adjustment.
The selected parameter will be indicated by the light of the
corresponding led.
As an indicative mode, use as a first work approximation the
following parameters and amperage adjustment table according
to each electrode and its diameter
POTENZA 200 CEL GE (Fig. 8) special adjustments
Nº1: Electrode type selector
Press 'Normal' for basic and rutile electrodes work.
Press 'Cel & Al' for cellulosic and aluminium electrodes work.
Nº2: Process type selector
Press 'MMA' for coated electrode welding.
Press 'TIG LA' for Lift Arc priming TIG welding.
Coated electrode pulsed welding
The POTENZA 200 PULSED (Fig. 12) model, along the standard
welding mode, counts with an advanced pulsed welding selector
(Num. 3). This mode allows a superior control of the heat
contribution and the drop transfer in the weld pool. In this mode of
operation, thin thicknesses and unstainable steel can be welded
with a minimum of projections and a similar TIG welding quality.
Unlike the standard mode where the current contribution
is monotonous, during the pulsed mode a peak current is
established for the exact drop-by-drop contribution, and a base
CLASS
MODEL ARC FORCE
E 6013 20
RUTILE
E 7024 10
E 7016 50
BASIC
E 316L 30
INOX
E NiFe-Cl 60
CAST
E 6010 100
CELLULOSIC
EL AlSi12 12 Si 100
ALUMINIUM
current to keep the welding arc active without overheating the
workpiece. According to the material, dimensions and joint type,
the user could optimize the process by adjusting the base and
peak distribution through the peak % selection. The user will
also be able to adjust the frequency (cycles per second) of each
pulsed welding cycle (peak + base).
For adjustment, first press 3 to enter through pulsed mode
and then, press encoder (Fig. 12, nº1) in order to select the
adjustment parameter. Adjust the value by turning the encoder.
The adjustable value ranges are:
A (PC) A (BC)
Peak Base
amperes amperes
20 – 200 30 – 100
2.- TIG welding
In the electric arc made by protected tungsten electrode through
inert gas welding, the consumable material is not the own electrode
but a filler rode of a similar or compatible material when welding.
In comparison with the coated electrode system, the TIG system
presents less productivity and a higher difficulty but with a high-
quality welding on all metals and their alloys, including all the
stainless metals and situations of low-thickness unions with or
without filler.
There is no dirt, projections or smoke in the welding.
CAUTION: Do not use nor sharpen thorium doped
tungsten electrodes with red mark due to the moderate
radioactive activity risk of the material. You will be
able to recognize the thorium dioxide presence and
concentration by its indicative strap on the electrode,
according to EN ISO 68848:2004 (colors: yellow, red, purple
and orange).
Avoid these electrodes and use substitutes with no content. For
example, lanthanum and cerium derived electrodes (straps: black,
grey, blue, gold) which do not show radioactive activity.
Prepare the electrode by sharpening its tip on the emery stone
so it will stay as a cone with an approximated height of twice the
electrode diameter. For a better arc and current managing capacity,
the proper attack from the tip to the stone must be longitudinal, and
the tip should be slightly flat.
For a correct electrode positioning in the torch, it should project
beyond the nozzle for about 5mm.
As a general rule, plug the output contrary to the usual TIG torch
electrode connexion to the negative terminal of the equipment,
while the earth clamp goes connected to the positive one.
Prepare and secure the piece. Adjust the current intensity according
to the material type necessities and the union to be made, firstly
trying it out on a testing piece.
Refer to the tables and specialized literature or to regulated
professional qualification for further information about it.
Inert gas should be provided to the torch (usually pure argon)
coming from a cylinder through a pressure reducer system. It must
be able to adequately regulate the necessary gas flow.
All the units need a TIG torch with a direct connection to the
flowmeter and gas control through the gate valve, incorporated in
the TIG torch itself.
To start the arc in all the models except S60.17L. PROGRESS1700L
and T100.20H, the torch tip should be slightly sharpened till the
- 30 -
HOT START 2.5 mm 3.2 mm 4 mm
40 50-75 A 95-120 A 140-170 A
30 - 120-170 A 150-170 A
50 80-100 A 100-140 A 130-170 A
30 60-80 A 80-110 A 110-140 A
40 70-90 A 90-130 A 120-160 A
100 40-70 A 60-100 A 90-150 A
50 35-65 A 55-90 A 80-140 A
% Hz
Peak duration Cycle
% frequency
10 – 100 0,5 - 6