Functional characteristics
MIG/MAG welding
Item No.: 099-004833-EWM01 67
5.2.11 MIG/MAG Push/Pull welding torch
The most important requirement for the greatest degree of efficiency and weld seam quality is the smooth
conveyance of the wire electrode. This is particularly problematic when:
• Longer tube packages are used,
• Wire electrodes have poor sliding properties,
• Wire electrodes have poor bending strength and
• An especially even wire outlet speed is required.
In this process, additional conveying aids in the torch produce significant improvements in comparison
with pure feed wire conveyors. In addition to a pushing wire feed (PUSH) in the power source / wire feed
case, a pulling wire feed (PULL) is used in the torch.
The two feed motors are synchronised by a current regulator.
Welding torches without potentiometers
Operating elements Functions
1 torch trigger Welding On/Off
Push/Pull torch with one potentiometer
Infinitely adjustable setting of welding performance (Up/Down function)
Changeover switch in WF unit to "Up / Down" (see "Internal operating elements" chapter)
Operating elements Functions
1 torch trigger Welding On/Off
1 rotary dial Infinite adjustment of the wire speed
5.2.11.1 Pin assignments
No potentiometers
With potentiometer for wire
feeding speed
With potentiometers for wire feeding
speed and arc length correction
Figure 5-29
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