Tweco 400 Ultra-Cut(May 2014) - Manual (Page 69)

ULTRA-CUT 100 XT/200 XT/300 XT/400 XT
Manual 0-5302 INSTALLATION 3-45
30 - 100 Amp Parts Assembly
Cartridge Covers
O-Ring
on Torch Tip
Shield Cap Protrudes
0.063-0.083" (1.6 - 2.1 mm)
Electrode
Plasma Gas
Distributor
Tip
Shield Gas
Distributor
Shield Cap
O-Ring
on Tip
1: Stack Parts 2: Press Cartridge onto Stacked Parts
4: Check Shield Cap Protrusion
Art # A-04873
No Gaps
Between Parts
3: Thread Shield Cup onto Cartridge
Shield Cap
Shield Cup
Installing Assembled Cartridge Onto Torch Head
3.26 Voltage Divider for iHC Torch Height Control
For best plasma cutting performance it is necessary to maintain a constant height (standoff) above the metal while cutting. Cutting
tables use a Torch Height Control (THC), also called a Z axis control, most of which use feedback from the arc voltage to control
the height. Several of these, including the iHC, part of the Victor Technologies XT CNC Controller, come with a Voltage Divider
Printed Circuit Board that has to be installed inside the plasma power supply to divide the high arc voltage down to lower levels
for use with control circuits.
There is a space for mounting the V-D Board located on the upper portion of an internal vertical panel near the rear of the power
supply. Predrilled holes for mounting the iHT V-D board as well as another popular height control are provided.
CAUTION
If using another board that doesn’t align with the existing holes, remove the panel if possible before drilling. If not
possible then every precaution must be taken to keep metal filings from being deposited inside the power supply.