Owner manual

ULTRA-CUT 100 XT
Manual 0-5272 INSTALLATION 3-7
3.08 Ground Connections
0 - 10 ft (0 - 3 m) Ideal
20 ft (6 m) Maximum
1/0
Ground Cable
Power Supply
‘Star’
Ground
Earth Ground
Rod
See
Manufacturer
CNC
Device
Torch
Cutting Table
Cutting Machine / Gantry
3/0 Work Cable
Remote Arc
Starter (RAS-1000)
Star Ground on Cutting Table
Note: The gas control module can
be mounted on top of the power
supply.
If it is, it should be grounded
directly to the power supply with
#4 AWG ground, (F).
Any location requires grounding
the power supply to the
‘Star’ ground with the 1/0
Ground Cable (F1).
Gas Control Module
Primary location
#4 AWG
Ground
(F)
Customer supplied
1/0
Ground Cable
(F1)
Art # A-11875
1/0 Ground Cable
A. Electromagnetic Interference (EMI)
Pilotarcstartinggeneratesacertainamountofelectromagneticinterference(EMI),commonlycalledRFnoise.This
RFnoisemayinterferewithotherelectronicequipmentsuchasCNCcontrollers,remotecontrols,heightcontrol-
lers,etc.TominimizeRFinterference,followthesegroundingprocedureswheninstallingmechanizedsystems:
B. Grounding
1. The preferred grounding arrangement is a single point or “Star” ground. The single point, usually on the cut-
tingtable,isconnectedwith1/0AWG(European50mm
2
) or larger wire to a good earth ground (measuring less
than3ohms;anidealgroundmeasures1ohmorless.Refertoparagraph‘C’,CreatingAnEarthGround.The
ground rod must be placed as close as possible to the cutting table, ideally less than 10 ft (3.0 m), but no more
than 20 ft (�.1 m) from the cutting table.
NOTE
All ground wires should be as short as possible. Long wires will have increased resistance to RF frequencies. Smaller
diameter wire has increased resistance to RF frequencies, so using a larger diameter wire is beer.
2. Grounding for components mounted on the cutting table (CNC controllers, height controllers, plasma remote
controls,etc.)shouldfollowthemanufacturer’srecommendationsforwiresize,type,andconnectionpoint
locations.
 ForThermalDynamicscomponents(exceptRemoteArcStarterandGasControlModule)itisrecommended
touseaminimumof10AWG(European6mm
2
) wire or flat copper braid with cross section equal to or greater
than10AWGconnectedtothecuttingtableframe.TheRemoteArcStarteruses1/0earthgroundwireandthe
GasControlModuleshoulduseminimum#4AWGwire.Theconnectionpointmustbetocleanbaremetal;
rustandpaintmakepoorconnections.Forallcomponents,wireslargerthantherecommendedminimumcan
be used and may improve noise protection.
3. Thecuttingmachineframeisthenconnectedtothe“Star”pointusing1/0AWG(European50mm
2
) or larger
wire.
4. Theplasmapowersupplyworkcable(seeNOTE)isconnectedtothecuttingtableatthesinglepoint“Star”
ground.