Cut with the Machine Torch
11 0 809240 Operator Manual Powermax45 XP
Pierce a workpiece using the machine torch
You can start a cut with the machine torch at the edge of the workpiece or by piercing the
workpiece. Refer to the cut charts on page 121 and the piercing guidelines below.
Piercing may result in shorter consumable life than with edge starts.
Pierce delay
The pierce delay is the length of time the triggered torch remains stationary at the pierce height
before the torch starts the cutting motion. The pierce delay must be long enough that the arc can
pierce the material before the torch moves, but not so long that the pierce hole enlarges and causes
the arc to “wander” or extinguish before the torch starts to move. As consumables wear, this delay
time may need to be increased.
Pierce delay times given in the cut charts are based on average delay times throughout the life of the
consumables.
Pierce height
For this system, the pierce height is generally between 1.5 and 4 times the cut height. Refer to the
cut charts starting on page 121 for specific values.
Pierce maximum thickness
When piercing materials close to the maximum thickness for a specific process, consider the
following important factors:
Allow a lead-in distance approximately equal to the thickness of the material being pierced.
For example, 12 mm (1/2 inch) material requires a 12 mm lead-in.
To avoid damage to the shield from the buildup of molten material created by the pierce, do
not allow the torch to descend to cut height until it has cleared the puddle of molten
material.
Different material chemistries can have an adverse effect on the pierce capability of the
system. In particular, high-strength steel with a high manganese or silicon content can
reduce the maximum pierce capability. Hypertherm derives mild steel parameters on
thicknesses of 12 mm (1/2 inch) or less using certified A572 Grade 50 plate.
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