Gullco PK-500-LG-x - Manual (Page 50)

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20. When ready, press the Auto Cycle Start push button ( ), located on the Remote
pendant, for two (2) seconds or more. (The Automatic Weld Cycle sequence of events is
described in the next section).
21. To stop the Automatic Cycle, press either the Auto Cycle Stop push button ( ) located
on the Remote Pendant, or on the Carriage Control.
AUTOMATIC WELD CYCLE SEQUENCE OF EVENTS
1. After the Auto Cycle Start push button has been pressed for two (2) seconds, the Auto
Cycle Indicator L.E.D. is illuminated, and the relay of the operational Water Cooler
Power Interface Kit is energized (if installed). The auto cycle then proceeds as described
in the following section.
2. The Main Control looks to see if there is a signal from the optional Coolant Flow Switch
Kit indicating sufficient coolant flow through the welding torch. While waiting for this
signal, the warning buzzers will emit short tones. The cycle will remain in this state until
the cycle is either aborted, or the flow signal is received. Note: if the optional Coolant
Flow Switch Kit is not being used, a shunt (jumper) is placed across pins 1 & 2 of the
CN51 header, located on the I/O board (PK-200-307) located in the main control box to
simulate this signal. Once the signal is received the auto cycle then proceeds as
described in the following section.
3. Audible warning buzzers located in the Remote Pendant and on the PIPE KAT
®
will
activate for the time period set by the Warning Buzzer Duration (see page 36).
4. Upon completion of the Warning Buzzer Duration, the gas solenoid valve is energized
and the Shielding Gas Pre-Flow Duration timing cycle is initiated (see page 35).
5. Upon completion of the Shielding Gas Pre-Flow Duration, the wire feed motor starts
feeding the wire through at the Wire Feed Soft Start Speed (see page 35) and the
Remote Arc Start Relay is energized (closing the welding power source’s remote
contactor circuit). This will continue until the reed switch located on the carriage
recognizes the presence of welding current, or the cycle is aborted.
6. When the reed switch recognizes the presence of welding current the wire feed motor
starts to deliver the welding wire at the Actual Wire Feed Speed and the oscillator head
starts to oscillate as per the settings of the Oscillator Control. The Weld Travel Delay is
also initiated.
7. Upon completion of the Weld Travel Delay (see page 35) the PIPE KAT
®
carriage will
start to travel at the Actual Carriage Weld Speed. The cycle will continue in this state
until the cycle is aborted.
8. When the Auto Cycle Stop button is pressed for more than two (2) seconds the auto
cycle will start a controlled shut-down as described below.
9. The PIPE KAT
®
carriage will immediately stop, the oscillator head will stop at its
Oscillation Rest Location which is typically programmed for the centre of its oscillation
width (see page 25), and the Crater-Fill Duration timing cycle is initiated (see page 35).
10. Upon Completion of the Crater-Fill Duration the wire feed will stop and the Burn-Back
Duration timing cycle is initiated (see page 35).