Hypertherm HT4100 Plasma Arc Cutting System Operating - Manual (Page 21)

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INTRODUCTION & SPECIFICATIONS
HT4100 Instruction Manual: Operation
Remote Voltage/Current (V/C) Control
This unit provides accurate operator control of the arc voltage and current. It in-
cludes high intensity LED displays which indicate the setpoints for volts and amperes
prior to starting the arc. After the arc is initiated, the displays automatically switch to
show the actual values of the voltage and current reached. This unit interfaces with
the Master power supply. Three different types of remote V/C controls are
available:
Switch Remote - Includes the voltage and current displays and two potentiometers
used to select the desired values. Also included are start and stop switches for the
power supply, switches for activating the torch height control (THC), and initial height
sensing (IHS) circuits. This unit is for use on guidance machinery that does not
include switches to control the initial height sensing and torch height functions.
Digital Remote - Includes the voltage and current displays and two potentiometers
used to select the desired values. It is used with guidance machinery that already
includes plasma control switches.
Programmable Remote - Includes the voltage and current displays. No switches or
potentiometers are included. All functions are controlled by the guidance machinery
computer. This unit also interconnects with the computer interface.
Gas Console
This unit houses solenoid valves for plasma and shield gas flow control as well as
flowmeters for plasma and shield gas flow, metering valves for plasma and shield gas
preflow, metering valves for shield gas operating flow, and three switches: one to
choose between oxygen or nitrogen, another to select either test preflow, test operate
flow, or run modes, and a third to adjust plasma operate flows during operate mode.
The gas console interfaces with the gas supplies, the motor valve console and the
Master power supply.
Motor Valve Console
This unit houses a motor-driven plasma gas metering valve as well as solenoid
valves to switch the plasma gas and shield gas from preflow to operate modes.
Plasma preflow and operate gas lines as well as shield preflow and operate
lines and interface cable connect the motor valve console to the gas console. The
motor valve console also interfaces with the torch via a lead set consisting of a
plasma gas hose, shield gas hose and a plasma-off valve control cable.
Note: The motor valve console must be mounted 10 feet (3 m) from the torch.
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