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Command Torch THC

Command THC Torch Height Control System
  • Overview
  • Specifications

The CommandTHC is a microprocessor-based torch height control system which accurately sets the initial piercing height and controls the torch-to-work distance of a plasma torch during cutting operations.

    X-Y standard system components
  • X-Y THC lifter assembly
  • Interconnecting cables
  • THC control module
  • Operator control pendant (optional)
  • Plasma system interface module
  • Breakaway(optional)
X-Y torch lifter
Limit switches
Upper and lower inductive proximity sensors
Max. Z-axis speed
Max. Z-axis stroke
200 ipm (5.0 m/min)
8 inches (200 mm)
Total weight with
torch mounting block
18.25 pounds (8.4 kg)
Positioning resolution
0.001 inch (0.025 mm)
THC control function
Set point resolution
Set point range
0.5 volt
50-300 volts
Maximum control accuracy
±1 0.5 volts
Voltage feedback (divider)
1/40.95 of arc voltage
Initial piercing height control function
On/off signal provided by CNC
Initial piercing height mode
Set cutting height; pierce height is automatically computed
Set point resolution
Set point range
Pierce height factor
Work contact sensing
Work clear
Pierce delay range
Pierce delay resolution
Machine acceleration delay
Machine acceleration delay
0.010 inch (0.10 mm)
0.020–1.00 inch (0.5–25.4 mm)
1 to 3 times the cutting height
Ohmic contact and/or motor torque
Loss of Ohmic contact
0 to 5 sec
0.010 sec
0.00 to 1.00 sec
Resolution 0.010 sec
Initial piercing height stall force
1–10 Relative setting
Initial piercing height speed
1–10 Relative setting
Homing speed
1–10 Relative setting
Homing speed
Ability to be synchronized with parallel THC systems
Electrically floating interface

Machine safety interlock System fully complies with the following standards and directives:
CSA 22.2 #60
UL 551
EN 60974-1
EN 50199
EN 55011
Low voltage directive
EMC directive
* Information subject to change without notice.
** User supplied display and keyboard are required