Miller Electric Manufacturing Co. has introduced its new XR-S Control and XR-D Control wire feeders.
The XR-S (shown) provides the option of using or not using a 0.2 second pre-flow shielding gas coverage and 3.5 second post-flow coverage.
Weighing under 43 pounds, the XR-S and XR-D Controls provide a portable solution for working up to 135 feet from the welding power source. An A/C variable speed, high torque "push" motor responds in real time to the gun-mounted DC "pull" motor. This allows the welding wire to virtually "float" through the liner, overcoming bends and extreme angles when working in and around large weldments.
Both units also feature adjustable run-in control for better arc starts with less stubbing and longer consumables life, as well as jog/purge functions that allow the wire and gas to be run without making the gun live. A trigger hold feature, common to both the XR-S and XR-D, reduces operator fatigue on large weldments by allowing the operator to weld without having to hold the trigger. Both units are compatible with air- or water-cooled guns.
The XR-S Control provides a digital wire feed speed display. An adjustable run-in control function provides reliable arc starts with very little stubbing and popping by gradually ramping up the wire feed speed until it reaches the desired full speed.
The XR-S provides the option of using or not using a 0.2 second pre-flow shielding gas coverage and 3.5 second post-flow coverage, allowing the user to select whether or not initial atmospheric shielding and protection from crater cracking are needed. The unit comes preset with pre-flow turned on and post-flow turned off.
The XR-D Control provides digital programming capabilities for improved performance in more advanced applications. It features point-of-use remote voltage control, which allows welders to adjust voltage levels at the feeder rather than the power source.
Programmable pre- and post-flow settings allow increased control to accommodate a wider range of welding applications and materials. Manual start and crater control features allow the user to gradually ramp up and ramp down the weld parameters at the beginning and end of the weld, providing additional control for fine tuning the bead profile and reducing cold lap, crater cracking and consumables costs.
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