STAYER WELDING PROGRESS 1700L Manual De Instrucciones página 35

Prepare the electrode by sharpening the tip with the emery stone
in such a way that a cone with a height of approximately 2 times
the electrode's diameter remains. For a better arc and current
handling capacity, the correct attack of the tip on the stone must
be longitudinal and the tip must be slightly flat.
In order to correctly position the electrode in the torch, it must
protrude about 5 mm above the nozzle.
As a general rule, connect the output inversely than the usual
connection of the electrode i.e. the TIG torch to the equipment's
negative terminal and the grounding clamp to the positive
terminal. Prepare and secure the piece.
As a general rule, supply pure argon at a flow of 6-7 l / minutes.
Adjust current intensity in accordance with the needs of the kind
of material and the joint to be made, making first a test on a test
piece. Refer to tables 5 and 6, specialized literature or regulated
professional training for further information in respect hereof.
The torch shall receive inert gas supply (usually pure argon)
proceeding from a cylinder, through a pressure reducing system
capable of suitably regulating the necessary gas flow volume.
Models TIG AC/DC 200HF y TIG AC/DC 315 HF present
features of maximum professionalism as explained in chapter
"advanced TIG welding".
Model PROGRESS 1700 L requires a TIG torch (not included,
STAYER references 38.71 and 38.73) with a direct connection to
the flow meter and as control by a flow valve that is incorporated
in the TIG torch itself.
Except for model PROGRESS 1700 L, internal start and stop
control is incorporated, so that the gas flow is governed internally
by means of the control pushbutton of the TIG torch.
In the PROGRESS 1700L, it is necessary to use a torch with
manual valve on the handle.
The TIG DC 200 HF model presents the advantage of having the
commutator of selection 2T / 4T in order not to hold the trigger
down in the position 4T.
Model PROGRESS 1700 L has the improved feature of a
touch start system (Lift Arc). This system allows for a minimum
electrode contamination. To start TIG welding, move switch 7
to position TIG, open the gas outlet valve and put the tip of the
torch in contact with the piece to be welded. Wait two seconds
and then slowly raise the torch slowly to make the arc to start
automatically and smoothly.
The remaining models have HF (High Frequency) priming with a
maximum priming quality as they do not need to have physical
contact with the piece so that the conditions of the arc and welding
are not deteriorated by contamination of the tungsten electrode.
To start TIG welding, move switch 7 to position TIG and simply
move the tip about 3-5mm close to the piece to be welded. Press
the pushbutton of the torch to strike the arc automatically. Should
there be starting difficulties, you may slightly lean the ceramic
nozzle against the piece to facilitate priming of the electrode.
Once the welding arc has been struck, proceed to carrying out
welding in accordance with the needs thereof. As a general
orientation, you shall have to advance inversely to electrode
welding such that, instead of drawing backwards, you act
pushing forwards as if you helped the gas flow to act on the weld
puddle.
Slowly deposit the filler material of the rod by successively
bringing it closer to the puddle of fused material. To finish, simply
stop pushing the switch of the torch, separate the torch very
ENGLISH
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slightly until the arc is interrupted and close the manual gas
flow valve. Finally, close the general flow valve of the inert gas
cylinder.
The POTENZA TIG 170 HF includes two adjustments of welding
end:
1. The 11 "Down Time" control stablishes a current ramp down
when welding stops. The ramp starts in the selected work
intensity and it finishes at zero amps. The duration time of
the ramp (from 0 to 5 seconds) is what it is adjusted with
the control. The aim is having a soft arc stop and a precise
control of the crater point of the end of the cord. As a general
rule, increase the time with increasing welding amperage.
2. The 12 "Post Time" control stablishes the time (from 0,5 to
7 seconds) of additional gas outlet (argon) after finishing de
welding arc. The aim is that the weld is not be polluted with
the air when it is liquid or too hot. As a general rule, increase
the time with increasing welding amperage.
MMA for TIG AC/DC 200HF
Welding intensity (0A – 200A) is set by means of the xy
parameter setting button. By means of the two xz parameter
selector buttons, you may increase (0 – 80A) the Arc Force
module depending on the kind of electrode, kind of steel and
kind of welding.
For example, for penetration welding where the risk of the
electrode becoming stuck in the insert is high, you will be able to
increase Arc Force until achieving a clean weld.
4.5.3.- ADVANCED TIG WELDING
This applies to models TIG AC/DC 250HF and TIG AC/DC
200HF
WELDING PARAMETER SETTING
The welding parameters are selected by sequentially pushing
button/control 19. Parameter magnitude is precision adjusted by
moving control 20. When, in addition to rotating control 20, you
push it while rotating, you may quickly increase or decrease the
value.
The machine is provided with an EEPROM memory so that the
machine's settings are preserved when it is turned off.
In order to know the setting range of each parameter, please
refer to the table of extended technical features at the beginning
of the manual. Functionally, the parameters are:
1. Gas discharge time before appearance of the electric arc (pre-
flux).
2. Gas discharge time after appearance of the electric arc (post-
flux).
3. Electric arc intensity at the initial intensity slope.
4. Electric arc intensity at the final intensity slope.
5. Increase time for the initial intensity slope.
6. Decrease time for the final intensity slope.
7. Consolidated welding intensity of the electric arc.
8. Pulse peak intensity of the welding arc.
9. Pulse base intensity of the welding arc.
10. Percentage of the pulse peak of the welding arc versus the
pulse base.
11. Pulse frequency of the welding arc.
12. Proportion of the negative half-wave of the alternating
welding current versus the positive half-wave.
13. Proportion of the negative half-wave of the alternating
welding current versus the positive half-wave.
14. Frequency of the polarity change of the alternating welding arc.
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