Tr 51 Remote Control Spot-Welding Unit - Fronius TRANSTIG 330 Operating Instructions Manual

Connecting the remote control unit:
Link the connecting socket
socket on the remote-control pedal unit electrically with the
remote control cable.
Plug in the plug-in connections the right way round, and screw
the coupling ring on as far as possible.
Functional description:
When the TR 52-1 remote-control pedal unit is connected, the
machine automatically switches over to 2-step operation.
LED indicator , symbol:
Gas pre-flow time and gas post-flow time are set directly at the
power source.
To initiate the ignition process, gently step on the pedal.
The level of the start arc current, the main current I
final crater current can also be controlled from the pedal.
When the welder takes his foot right off the pedal, the welding
current is switched off, thus interrupting the welding operation.
Gas post-flow time
Limitation of main current
If the maximum welding current value is set internally on the main
current I dial then the remote control pedal may be depressed
H
to its full extent without the main welding current exceeding the
pre-set value. This has two advantages. The first of these is the
fact that the selected current range is covered by one complete
depression of the foot pedal. Secondly, the danger that a thin
tungsten electrode could be overloaded and thus burn through,
due to the operator accidentally depressing the pedal to its full
extent, is eliminated.
Pedal pressed down = welding "ON"
Current is regulated by pedal
Foot off the pedal = welding "OFF"
I
I
H
O
Fig. 33 Functional sequence in standard welding operation with the TR 52-1 remote-
control pedal unit (2-step)
on the power source and the
(on the power source) lights up
elapses.
I
H
TR 51 REMOTE CONTROL
SPOT-WELDING UNIT
Standard welding of thin sheet metal constructions in such a way
that they do not rust is often not possible due to severe warping
of the material. This is where spot welding comes into its own.
Similarly, problem welds, such as joins which are only accessible
from a single side, can easily be dealt with using the TIG spot-
welding process.
and the
H
Fig. 34
Connecting the remote control unit:
Link the connecting socket
socket
with the remote control cable.
Plug in the plug-in connections the right way round, and screw
the coupling ring on as far as possible.
When a successful connection is made, the LED indicator
(for spot welding) on the TC 3 control section of the power
source will light up.
Functional description:
When the TR 51 spot-welding remote-control unit is connected,
the machine automatically switches over to 4-step operation.
Gas pre-flow time, current rise time, current drop time and gas
post-flow time are set directly at the power source.
t
The setting dial for current rise time
far round to the left as it will go, and the dial for current drop
time should be turned right the way round to the right
(i.e. set very slow).
Set HF-selector switch
A special - insulated - spot-welding nozzle is used, which is
mounted on the cone.
Depending on the size of spot-weld required, mount the
tungsten electrode approx. 2 - 3 mm back from the edge of the
nozzle (Fig. 36).
Set the spot-welding current and time on the remote-control
unit.
Place the torch (i.e. the spot-welding nozzle) on the workpiece
(Fig. 36).
To carry out the spot-weld, gently press down onto the base
material and actuate the torch trigger.
(Make sure there is no air-gap!)
47
on the power source and the
on the spot-welding remote-control unit electrically
to "1"
should be turned as