Hypertherm XPR460 - Gas-Change Purges for Optimix or VWI Cutting Systems; Process-Setup Purges for All Plasma Cutting Systems

■
The process that was selected before
■
The type of gas connect console:
□
OptiMix and VWI cutting systems do both gas-change purges and process-setup purges.
□
CorePlus and Core cutting systems do only process-setup purges.
The system uses these conditions to calculate the length of time that is necessary to complete a purge:
■
The type of operator-selected process
■
If the active process is the first process that was sent after the Power-up state
Gas-change purges for OptiMix or VWI cutting systems
If your cutting system has an OptiMix or VWI gas connect console, a plasma-gas purge can occur
automatically.
A plasma-gas purge can occur automatically when the cutting system changes from:
■
A non-mixed-fuel gas process to a mixed-fuel gas (H
2
-mix)
■
A mixed-fuel gas (H
2
-mix) or F5 to a non-mixed-fuel gas process
The type of plasma gas used for the purge is different for different cutting system configurations:
■
OptiMix cutting systems use a two-phase gas-change purge that includes N
2
.
■
VWI cutting systems use a two-phase gas-change purge that includes air.
The following steps occur automatically for a plasma-gas purge:
1 The mixed-fuel gas (H
2
-mix) or F5 drains from the plasma cutting system through the torch.
2 For an OptiMix cutting system, N
2
removes residual mixed-fuel gas.
3 For a VWI cutting system, air removes residual F5 gas from the torch lead.
A shield purge can be necessary in some conditions:
■
If a process changes from a wet process to a dry process, a shield-fluid purge is used.
■
During a shield-fluid purge, N
2
removes residual water from the shield gas/fluid hose.
■
A wet process uses water as a shield fluid. A dry process does not use water as a shield fluid.
Core and CorePlus cutting systems use only process-setup purges. They
do not use gas-change purges.
Process-setup purges for all plasma cutting systems
Process-setup purges are different for an OptiMix or VWI gas connect console than they are for a
CorePlus or Core gas connect console.
Operation
6
230
811530 Instruction Manual XPR460