DESCRIPTION OF OPERATION
0740 800 186
- 33 -
© ESAB AB 2016
MMA normal welding mode
In the MMA normal welding mode, the welding current is briefly increased at the start of
welding. The peak current, phase 1 in the diagram above, is engaged for 150 milliseconds.
The peak current is twice the normal welding current up to 150 A (i.e. twice the set value),
subject to a maximum of 210 A for the Tig 1500i and 240 A for the Tig 2200i.
The hot start current, phase 2 above, is engaged for 1.5 seconds. It is set in per cent of the
set current, but does never exceed the peak current.
MMA drop welding mode
In the MMA drop welding mode, the peak current is three times the set value, but the
duration is shorter at only 50 ms.
The hot start current, phase 2 above, is engaged for 240 milliseconds. It is set in per cent of
the set current, but does never exceed the peak current.
20AP1:10 Cooling unit control
Starting the welding equipment:
1. The welding data unit senses whether the water lock microswitch, 5S2, is closed or not.
2. If it is closed, a command to start the pump is generated, and a relay in the cooler starts
the pump and the fan.
3. If welding does not start within 6.5 minutes, the pump is stopped.
The pump is stopped if the water lock microswitch opens.
Starting to weld:
1. The welder presses the welding torch trigger switch.
2. The water pump starts if the water lock microswitch is closed.
3. Welding starts.
Stopping welding:
Summary of Contents for Caddy Tig 1500i TA34
Page 10: ...WIRING DIAGRAM 0740 800 186 10 ESAB AB 2016 Tig 1500i with control panel TA34 ...
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Page 12: ...WIRING DIAGRAM 0740 800 186 12 ESAB AB 2016 Tig 2200i with control panels TA33 and TA34 ...
Page 13: ...WIRING DIAGRAM 0740 800 186 13 ESAB AB 2016 ...
Page 20: ...DESCRIPTION OF OPERATION 0740 800 186 20 ESAB AB 2016 ...
