Design and function
MIG/MAG welding
099-004846-EW501
8.01.2014
49
5.7.14.2
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
NOTE
Changeover switch in WF unit to "Up / Down" (see "Internal operating elements" chapter)
Infinitely adjustable setting of welding performance (Up/Down function)
Operating elements
Functions
1 torch trigger
Welding On/Off
1 rotary dial
Infinite adjustment of the wire speed
5.7.14.3
Pin assignment
No potentiometers
With potentiometer for wire
feeding speed
With potentiometers for wire
feeding speed and arc length
correction
Figure 5-15
Summary of Contents for Phoenix Expert drive 4L M3.70
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