Hypertherm HT4400 HySpeed Plasma Arc Cutting System - Manual (Page 67)

OPERATION
4-8 HT4400 Instruction Manual
Daily Startup
Prior to startup, ensure that your cutting environment and that your clothing meet the safety requirements outlined
in the Safety section of this manual. See Post-installation in Section 3 if you are switching the power supply on for
the first time.
WARNING
B efore operating this system, you must read the Safety section thoroughly! Turn main disconnect
switch to the power supply OFF before proceeding with the following steps.
Retaining Cap Torch Current Ring Electrode Swirl Ring Nozzle
1. Check Torch and Consumables
1. Remove the consumables from the torch and check for worn or damaged parts. See Changing
Consumable Parts later in this section. Always place the consumables on a clean, dry, oil-free
surface after removing. Dirty consumables can cause the torch to malfunction.
• Check the pit depth of the electrode. The electrode should be replaced when the depth exceeds
.040 inch (1 mm). A gauge for measuring electrode pit depth can be purchased through Hypertherm.
See Section 6 Parts List in this manual. See also Inspect Electrode Pit Depth later in this section.
• Wipe the current ring in the torch with a clean paper towel or cotton swab.
• Refer to the Cut Charts to choose the correct consumables for your cutting needs.
2. Replace consumable parts. Refer to Changing Consumable Parts later in this section for detailed
information on replacing consumables.
3. Ensure that the torch is perpendicular to the material. Refer to Section 3 for the torch alignment
procedure.