Connector For Tig Welding - Fimer TT255 AC/DC Manuel D'emploi

End current: Used to set the value which the
welding current reaches at the end of the ramp-
down.
End time: Used to set the time for which the
current determined by the final current parameter is
applied.
In 4t/4bi mode this time has no effect and the initial
current is maintained as long as the torch button is
held down.
Post gas time: Used to set the time of gas delivery
after the welding current has stopped.
Pulse mode: Used to activate (Hz) or deactivate
(OFF) the pulse welding mode; with the pulse
welding mode active (Hz) the machine delivers the
welding current for a certain time and the current
determined by the base current parameter for
another period of time. The number of current
impulses per unit time is given by the value of the
frequency parameter.
The pulsation is activated only during the welding
phase and not during the initial/final current phases
or during the ramps.
Background current: Used to set the base current
used during generation of the pulses.
Pulse frequency: Used to set the number of
current impulses per unit time when the pulse
welding mode is active.
Pulse balance: This represents the percentage of
time for which the welding current is applied when
the pulse welding mode is active.
Water pump: Used to switch on (ON) or switch off
(OFF) the water pump unit if present.
Remote: Used to switch on (ON) or switch off
(OFF) the remote control of the intensity of the cur-
rent delivered.
Min current: Used to set the minimum output cur-
rent when the remote control is at the minimum
adjustment value.
Spot welding: Used to set (if other than 0) the
maximum duration of the weld.
Pause: Used to set (if other than 0) the duration of
the pause between two successive spot welds.
DC trigger current: Used to determine the
amplitude of the initial impulse current which the
machine delivers during ignition of the electric
arc, as a % of the welding current l1 (e.g. 130%
implies Itrigger=1.30I1).
Span: Used to determine the duration, expres-
sed in milliseconds, of the initial current impulse
which the machine delivers when striking the
electric arc.

8. CONNECTOR FOR TIG WELDING

1) Connect the earth cable to the appropriate '+'
socket on the front of the device (14 of fig.1). Insert
by lining-up the key with the groove and turn in a
clockwise direction until it stops. Do not fasten too
tightly!
2) Connect the torch to the appropriate '-' socket on
the front of the device (12 of fig 1).
3) Insert by lining-up the key with the groove and
turn in a clockwise direction until it stops. Do not
fasten too tightly!
4) Insert the torch pulse signal connector into the
socket
TIG WELDING:
Before connecting the gas make sure the cylinder
contains Inert gas. Never use any other type of gas.
Connect the pressure regulator to the cylinder, after
which, connect the latter to the gas tube of the torch.
TIG welding is usual-
ly carried out with a
constant current, with
a negative pole ('-'
see fig.6).
The cable of the TIG
torch is then inserted
into the negative
socket (12 of fig.1),
whilst the earth cable
of the workpiece is
connected to the posi-
tive socket. (14 of
fig.1).
At this stage it is possible to adjust the welding
current using the potentiometer (9 of fig. 1) on
the front panel.
The diameter of the electrode and the welding cur-
rent settings must be selected according to the cha-
racteristics of the material to be welded.
Fig.6
15