CHAPTER 3: OPERATING INSTRUCTIONS
PHASEMASTER™ 6 DIRECT ENERGY WELDING CONTROL
990-083
3-11
Section III. Adjusting Weld Heads
Refer to the appropriate weld head manual for instructions on how to install the welding electrodes.
Set the Force Indicator on all Unitek Peco Weld Heads to “3”. For more detailed information on setting up each
specific weld head, refer to their respective manual.
Adjusting Air Actuated Weld Heads
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Select [NO WELD] and set SQUEEZE and HOLD TO 0 cycles. Set WELD to 0.5 cycles.
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Set the Air Regulator(s) for 10 psig. Fully open both Flow Controls. Remove the workpiece from between or
beneath the electrodes.
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The sequence with an air head is as follows: the first level of a 2-Level Footswitch actuates the weld head,
moving the electrodes together. The Weld Period can not begin until the Second Level of the Footswitch AND
the Force Firing Switch in the Weld Head close. If neither of these conditions is met within 10 seconds, the
PM6 will issue an Alarm. When the Firing Force is reached, the Weld Period will start. Assuming that an alarm
does not occur, the welding sequence will continue to completion and the weld head will rise at the end of the
hold period. If Footswitch Weld Abort is ON, releasing the Footswitch at any time during the welding
sequence will terminate the sequence.
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If the regulator assembly has two regulators, adjust the regulator that controls the air pressure on the bottom of
the cylinder so that the head rests against its Upstop.
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Adjust Upspeed Flow Control, on the top of the cylinder, so that the upper arm of the weld head moves at a
reasonable rate but does not slam against the upstop. This adjustment is made by pressing and then quickly
releasing the Footswitch. If the cylinder does not lower the weld head, increase the regulator that controls the
air pressure on the top of the cylinder. See Chapter 2, figure 2-4.
•
Place the workpiece in position between the electrodes. Close the Downspeed Flow Control, which is located
on the bottom of the cylinder. Press the Footswitch. Adjust the Downspeed Flow Control, so that the upper
electrode moves at a reasonable rate and does not impact the workpiece hard enough to damage either the
electrode or the workpiece. If the Flow Controls interact, re-adjust both flow controls, as necessary.
•
Place a Force Gauge on the lower electrode holder or work plate, as illustrated in figure 3-1.
