Control Unit - Migatronic PI 250 AC/DC HP Manual De Instrucciones

Control knob
All parameters are set by the use of only
one control knob. These parameters include
current, pulse time, slope-up 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.
Storage of parameters - programs
This function enables storage of programs
(often used machine settings) and shift from
one complete program to another. By pressing the
keypad the display shows a "P" and a number: "1", "2"
etc. Each number includes a program with all
parameters and functions of the machine. It is there-
fore possible to have one program for each welding
job for which the machine is used.
It is possible to store 10 settings in each welding
process (MMA DC, MMA AC/DC, TIG DC and TIG
AC/DC) = 40 program settings.
Each program can be selected by:
1. Choose between MMA or TIG.
2. Choose between DC or AC.
3. Select program number (P01...P10). The control
knob can be used for shifting between the
programs when the key pad is kept pressed down.
Reset of current program (Factory default settings).
Keep pressed the knob: after 3 sec the display will
start flashing to indicate the current program has been
restored to Factory settings.
The latest used program setting in the relevant
program group (MMA DC, MMA AC, TIG DC and TIG
AC) will be shown when the program key pad is
selected.

CONTROL UNIT

t
1
TIG AC/DC
t
2
V
Welding current
The key pad can be used to display the
welding current.
Adjustable from 5A to 200A or 250A depending on the
machine model. 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.
Units for parameters
Units of measurement of the selected para-
meter.
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.
Mains error indicator
The mains error indicator is illuminated if the
mains voltage is more than 15% lower than the rated
voltage.
Cooling fault
Cooling fault is shown in case of connection
of wrong type of torch, or if a torch has not been
connected. If a flow control kit has been selected, the
cooling fault may indicate problems in the cooling unit.
18
A
s
Hz
%
A