Hypertherm THC2 Torch Height Control - Manual (Page 8)

THC-2 Torch Height Control
DESCRIPTION AND SPECIFICATIONS
Page v
DESCRIPTION
T
he THC-2 Torch Height Control automatically controls torch height while plasma cutting. After
setting the arc voltage with the thumbwheel on the front panel, the THC-2 controls the torch
suspension motor by comparing this reference voltage with the voltage between the torch and
the workpiece. If the torch is too high from the workpiece, the actual arc voltage will be greater than
the reference voltage. The Arc Voltage Control will then activate the torch suspension motor to move
the torch downward. If the torch is too close to the workpiece, the arc voltage will be less than the
reference voltage. In this case, the Arc Voltage Control will activate the torch suspension motor to
move the torch upward.
The THC-2 comes with a voltage divider that mounts in the MAX100 , MAX100 D and MAX200 power
supplies, or in the PAC-500/500L Plasma Control Console. The voltage divider reduces the arc
voltage by a ratio of 25:1.
Section 1 of this manual - Installation - describes mounting the THC-2 module and connecting it to
the cutting machine computer and the torch lifter. Sub-sections 1a, 1b etc. describe hooking the
THC-2 to Hypertherm products that utilize this type of torch-height control. Section 2 is a brief
operation section, and Section 3 is a parts list. A wiring diagram follows the parts list.
SPECIFICATIONS
THC-2 Control Module - #053005*
Power Input ......................................................... 115 VAC, 50/60 Hz
Operating Environment ....................................... 32
°
F (0
°
C) to 122
°
F (50
°
C)
Height .................................................................. 6 inches (152 mm)
Width ................................................................... 8 inches (203 mm)
Depth ................................................................... 17 inches (432 mm)
Weight ................................................................. 15 pounds (6.8 kg)
Arc Voltage Setting Range .................................. 100-250 V
Control Accuracy ................................................. +/- 2 V
* For a parts list breakdown of the THC-2 systems see Section 3 - Parts List