Migatronic PILOT 1800 E Manuel D'instruction page 20

Reduced current
When four-times welding a reduced current
is activated by pressing the trigger briefly. This re-
duced current is set to a percentage value of the
welding current and is variable between 0-100% of
the welding current with a minimum value of 5 A.
Indication of a welding process
During welding, when adjustment of current is
activated by means of the A-keypad, it is possible to
see the actual phase of the welding process.
Pulse welding
This section contains functions for
pulse welding and is divided in two:
the above connects or disconnects
pulse welding, the below contains
the diffent pulse parameters.
Pulse cannot be connected or disconnected during
the welding process.
Pulse
Pulse welding has been selected.
No pulse
Welding without pulse has been selected. The
pulse parameters cannot be activated.
Pulse parameters
The pulse parameters can be both selected and
changed during pulse welding. The figure below
illustrates the meaning
parameters:
Amp
pulse time
Set welding
current
Base current
The pulse time
Reflects the time the machine is welding with
the pulse current. The pulse current is the adjusted
welding current. Time is adjustable between 0.01
and 10 seconds.
Pause time
Reflects the time the machine is welding with
base current. Time is adjustable between 0.01 and
10 seconds.
Base amp
Is set as a percentage value between 1 and
99% of the current level set on the display (= pulse
current), although this percentage cannot be less
than a value that corresponds to 5 A.
of the three pulse
pause time
time
Parameters for MMA welding
and TIG spot welding
Parameters can be both selected
and adjusted during welding.
Arc-power
The arc power function is used to stabilise the
arc in MMA welding. This can be achived by in-
creasing welding current by a percentage value
when metal droplets are short-circuited. The
additional current ceases when the short circuit is no
longer present.
Amp
Set welding
current
Arc power can be adjusted between 0 and 150% of
the welding current setting.
E.g. If the welding current is set to 40A and arc
power to 100% the additional current is 40 A
equals 80 A when doing arc power. If the arc
power is set to 150% the additional current is
60 A equals 100 A when doing arc power.
Hot start
Hot start is a function that helps to establish
the arc during MMA welding. This can be achieved
by increasing welding current (when the electrode is
applied to the workpiece) by a certain percentage
value in relation to the set value. This increased start
amp is maintained for half a second, after which it
decreases exponentially over a period of one second
to the set value of welding current.
Amp
0,5 s
Set welding
current
Welding
start
The hot start value reflects the percentage value by
which initial current is increased, and can be set
between 0% and 100%.
Spot time
Spot time is the time for the production of a spot-
weld and can only be used with the TIG process.
The time includes any slope-up and slope-down
times and can be set only after spot trigger mode
has been selected on the keypad.
20
Additional current
supply from the arc
power function
short-
time
circuit
Additional
current supply
from hot-start-
function
time