Spotmatic - EWM Tetrix 352 Synergic Operating Instructions Manual

Design and function
TIG welding

5.2.19 spotmatic

In contrast to the spotArc operating mode, the arc is not ignited by pressing the torch trigger as is usual,
but by briefly touching the tungsten electrode against the workpiece. The torch trigger is used for welding
process activation. Activation is indicated by flashing of the spotArc/spotmatic signal light. The process
can be activated separately for each spot or also on a permanent basis. The setting is controlled using
the process activation parameter in the configuration menu > see 5.9 chapter:
•
Separate process activation (
The welding process has to be reactivated for every arc ignition by pressing the torch trigger. Process
activation is automatically terminated after 30 s of inactivity.
•
Permanent process activation (
The welding process is activated by pressing the torch trigger once. The following arc ignitions are
initiated by shortly touching the tungsten electrode against the workpiece. Process activation is
terminated either by pressing the torch trigger again or automatically after 30 s of inactivity.
For spotmatic the separate process activation and the short spot time setting range are enabled by
default.
Ignition by touching the tungsten electrode against the workpiece can be disabled in the machine
configuration menu with parameter
setting range can be selected in the machine configuration menu.
The duration is set in the machine configuration menu using parameter
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible,
however > see 5.2.17 chapter.
Selecting the process activation type for the welding process > see 5.9 chapter.
Up-slope and down-slope times possible for long spot time setting range (0.01–20.0 s) only.
 Press and release torch trigger (tap) to activate the welding process.
 Touch the torch gas nozzle and tungsten electrode tip carefully against the workpiece.
 Incline the welding torch over the torch gas nozzle until there is a gap of approx. 2–3 mm between the
electrode tip and the workpiece. Shielding gas flows during the set gas pre-flow time
ignites and the previously set ignition current
 The main current phase
 For long-time spot welding only (parameter
The welding current decreases to the end-crater current
 The gas post-flow time
Press and release the torch trigger (tap) to reactivate the welding process (only for separate
process activation). Touching the welding torch with the tungsten electrode tip against the
workpiece again will initiate the next welding processes.
40
> ):
> ):
. In this case the function works as with spotArc, but the spot time
Figure 5-22
flows.
ends when the set spot time elapses.
=
elapses and the welding process ends.
> see 5.9 chapter
):
within the set down-slope time
. The arc
.
099-000141-EW501
20.11.2017