OPERATION
CommandTHC for X-Y Table Instruction Manual 4-11
5
Determining pierce height factor
Typical pierce height factor
See Figure 4-4 for sequence of events.
The Pierce Height Factor is a percentage of the cut height. The factor is entered into the THC pendant and the system
calculates the required pierce height. The Cut Height will be maintained until the Machine Acceleration Delay time has
elapsed, then Automatic Voltage Control will control torch height.
The default pierce height factor is 150%. Typically, this value is left at 150%.
EXAMPLE: Cut Height = 0.100 inch
Pierce Height Factor = 150%
0.100 inch X 150% = 0.150 inch*
Pierce Height = 0.150 inch
*THC system performs this calculation.
Sets the lifter retract (homing) speed. This value is a compromise between
machine speed and the amount of weight on the lifter. At lower speeds, the
lifter is capable of lifting heavier loads.
Setpoint range: Relative value between
1 (minimum) and 10 (maximum)
Homing Speed
Units can be set for inches or millimeters.
Inch or Metric Units
Sets a retract delay to allow time for the arc to ramp down and extinguish.
This time delay will start when the CNC removes the "Cycle Start" signal and
the plasma system is commanded to shutdown. After this programmed delay,
the torch will retract. Set this delay as short as possible, so that the
torch does not retract when the plasma arc is still active.
Retract Delay should be used on Hypertherm LongLife plasma systems.
Retract Delay
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