How to use the cut charts

The cut chart provides Hypertherm® recommended settings for cutting mild steel with the retrofit machine and robotic torches.

The cut chart contains the following information:

Material thickness

Thickness of the workpiece (metal plate being cut).

Cut height

Distance between the shield and the workpiece during the cut.

Initial pierce height

Distance between the shield and the workpiece when the torch is triggered, before it moves to the cut height.

Pierce delay

Length of time the triggered torch remains stationary at the pierce height before the torch starts the cutting motion.

Best quality settings (cut speed and voltage)

Provides a starting point for finding the best cut quality (best angle, least dross, best cut-surface finish). Adjust the speed for your application and table to obtain the desired result.

Highest production settings (cut speed and voltage)

Are 70% to 80% of the maximum speed ratings. These speeds result in the greatest number of cut parts, but not necessarily the best possible cut quality.

The arc voltage increases as the consumables wear, so you may need to increase the voltage setting to maintain the correct torch-to-work distance. Some Computer Numerical Control (CNC) systems monitor the arc voltage and adjust the torch height automatically.

Kerf width

The width of the cut. Hypertherm obtained the kerf width data using the Best Quality settings. Differences in installation conditions and material composition can change your actual results.