66
-
Make a ground (earth) connection to the workpiece
Important!
Make sure that the contact between the grounding (earthing) clamp and the
workpiece is on a cleaned section of the workpiece.
-
Plug in the machine to the mains
-
Shift the mains switch to the “I” position
-
Select set-up parameter “r”
-
See: “The set-up menu: Level 2”, either sub-section “TIG set-up parameters” or
sub-section “Rod electrode set-up parameters”, depending on which process is
being used
-
Place the electrode down firmly on the surface of the workpiece
Important!
Make sure that the contact between the electrode and the workpiece is on
a cleaned section of the workpiece. While the measurement is being performed, the
cooling unit and the cold-wire feeder are deactivated.
-
Make sure that set-up parameter “r” has been selected, then briefly press the “gas-
test” button (14)
The welding circuit resistance is now calculated; during the measurement, the right-
hand display reads “run”.
-
The measurement is finished when the welding circuit resistance is shown on the
right-hand display (e.g. 11.4 milliohms)
General remarks
Indicating the welding circuit resistance “r”
Measuring the welding circuit resistance “r” provides information on the overall
resistance of the torch hosepack, welding torch, workpiece and earthing (grounding)
cable.
If an increased welding circuit resistance is detected, e.g. after changing the torch, this
may mean that one or more of the following components is/are faulty:
-
torch hosepack
-
welding torch
-
earth (ground) connection to the workpiece
-
earthing (grounding) cable
After it has been measured, the welding circuit resistance is indicated on the right-hand
display.
r
.......... Welding circuit resistance ... x milliohms (e.g. 11.4 milliohms)
Measuring the
welding circuit
resistance “r”
Available set-up
parameters
(continued)
Uco
....
U
(voltage)
c
ut-
o
ff
... Welding-voltage limitation ... OFF / 20 - 90 V
Factory setting: OFF
The arc-length is basically dependent upon the welding voltage. In order to end the
welding operation, it is usually necessary to make a pronounced lifting motion of the rod
electrode away from the workpiece. With the “Uco” parameter, the welding voltage can
be limited to a value which makes it possible to end the welding operation simply by
only slightly lifting the rod electrode.
Note!
If, during welding, you often find that the welding operation is ended
unintentionally, set the “Uco” parameter to a higher value.
Содержание MagicWave 1700
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