Control Unit - Migatronic FOCUS TIG 200 AC/DC PFC Manual De Instrucciones

Control knob
All parameters are set by the use of only
one control knob. These parameters
include current, slope-down time, etc.
This control knob is positioned in the right side of the
control panel. The digital display shows the value of
the parameter being set. The unit of measurement of
the parameter is shown on the right side of the digital
display.
A parameter can be selected by means of the relative
keypad in the relevant section. A bright indication light
indicates the parameter selected. The control knob is
then used for setting a new value.
Welding current
The key pad can be used to display the
welding current.
Adjustable from 5A to 200A. After the welding process
has stopped, the adjusted current is shown on the
display. During welding, however, the actual welding
current is shown. During pulse welding an average
welding current is automatically shown when shifting
between welding current and base current becomes
faster than possible viewing. Press the key for
3 seconds to display the arc voltage (valid ONLY for
TIG DC and MMA DC). Press again "A" to display the
welding current.
Units for parameters
Units of measurement of the selected
parameter.
Welding voltage indicator
The welding voltage indicator is illuminated for
reasons of safety and in order to show if there is
voltage at the output taps.
Overheating error indicator
The overheating indicator is illuminated if
welding is interrupted due to overheating of the
machine.

CONTROL UNIT

Mains error indicator
The mains error indicator is lit if the mains
voltage is more than 25% lower than the nominal
mains voltage.
Secondary parameters
before the HF arc is established, or until the torch is
lifted away from the workpiece in the LIFTIG process.
Variable 0-10 sec.
stage. During this stage current is reduced from
welding current to Final Amp over a period of time
called the slope-down time and variable 0-20 sec in
steps of 0.1 sec.
variable 0-20 sec.
welding process, AC is used for welding of aluminium
and its alloys, while DC is used for the welding of other
materials.
alloys. The function is a balance based on time
between the positive and negative halfperiod.
Adjustment is possible between 20 and 80 percent as
the statement in percent is based on the negative part
of the period time. Adjustment continues until a
suitable refinement zone is established around the
molten pool. Forcing the balance to 100% the machine
will execute one "preheating" action in positive polarity,
followed by standard continuous negative welding.
This function is intended to "clean" the material at the
beginning of each welding.
angle of the point of the electrode, as well as the size
of the ball at the end of the electrode.
Adjustment is possible from 1 to 15, with 1 being the
minimum and 15 being the maximum preheat periods.
If the period is too short the pilot arc will extinguish
shortly after ignition. The size of the ball at the end of
the electrode will increase if the pre-heat period is too
long.
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Pre-flow [s]
Pre-flow is the period of time for which gas
flows after the torch switch is pressed and
Slope-down [s]
When welding has stopped by activating the
trigger, the machine enters a slope-down
Post-flow [s]
Post-flow is the period of time for which gas
flows after the arc is extinguished and is
Current type
It is possible to select either AC (alternating
current) or DC (direct current). In the TIG-
AC-t-balance (based on time)
Adjustment of the refinement function during
the AC TIG welding of aluminium and its
Electrode preheating
The length of the preheat period depends on
both the diameter of the electrode and the