Tweco 300 XT Ultra-Cut Plasma Cutting System - Manual (Page 67)

ULTRA-CUT 300 XT
Manual 0-5274 OPERATION 4-3
POWER
ON
OFF O
I
OFF
O
Art # A-11542
OFF
O
OFF
O
3. Set Gas Pressure GCM 2010
a. Place Mode switch in SET PREFLOW mode. Adjust Preflow pressure as required for the cutting process.
b. Set Mode Switch in SET PLASMA & SHIELD position. Adjust plasma and shield pressure regulators to
correct pressure.
c. Set plasma and shield ( if process calls for setting shield flow) flow meters to correct flow.
d. Return Mode Switch to RUN position.
4. Set cutting current.
a. Set cutting current using the AMPERAGE SET_UP knob and LCD display on the GCM 2010.
5. Prepare to cut.
a. Protect your eyes and ears.
b. Position the Torch to the proper transfer distance above the work piece.
6. Apply START.
• Gas indicator lights; Gas pre-flow starts.
• During gas pre-flow power supply is enabled. DC lamp turns ON.
7. Pilot Arc
• At the end of pre-flow, ignition occurs (arcstarter fires) and the Pilot Arc is established.
8. Transfer
• Almost immediately, if the torch is positioned correctly, the pilot arc transfers to the work and becomes
a cutting (transferred) arc.
• Current quickly ramps up to the level set by the Current Control and the arc pierces through the metal.
• OK to Move signal becomes active and the torch is moved to perform the cut.
9. End of Cut
• START signal is removed; current ramps down and goes out.
• Gases continue to flow for the selected Post-flow time then stops.
• Pump and fan will run for 4 minutes then shut off.
10. To make another cut repeat steps 5-9. A second cut can be started anytime after completing the first cut.
11. Shut off the system.
a. Set the ON/OFF power switch on the front panel of the unit to OFF.