Tweco PakMaster 75XL Plus (CE) - Manual (Page 25)

Manual 0-2782 3-9 INSTALLATION
Remote Pendant
Adapter Wire
Harness
A-03676
Pilot Lead
Torch Lead
Assembly
Negative/Plasma
Lead
Control Circuit
Connectors
Open
Open
Power Supply
Adapter
Bulkhead Connection Detail - Unshielded Machine
Torch with O2B Fittings and Remote Pendant
Adapter
10. Tighten the Strain Relief onto the Torch Leads or
ATC Adapter Leads Assembly.
11. Connect the remote pendant to the remote pen-
dant adapter.
12. Check the torch for proper consumable parts.
3.08 Ground Connections For
Mechanized Applications
A. Electromagnetic Interference (EMI)
Pilot arc initiation generates a certain amount of electro-
magnetic interference (EMI), commonly called RF noise.
This RF noise may interfere with other electronic equip-
ment such as CNC controllers, remote controls, height
controllers, etc. To minimize RF interference, follow these
grounding procedures when installing mechanized sys-
tems:
B. Grounding
1. The preferred grounding arrangement is a single point
or “Star” ground. The single point, usually on the
cutting table, is connected with 1/0 AWG (European
50 mm
2 ) or larger wire to a good earth ground (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 (6.1 m).
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 di-
ameter wire is better.
2. Grounding for components mounted on the cutting
table (CNC controllers, height controllers, plasma re-
mote controls, etc.) should follow the manufacturer’s
recommendations for wire size, type, and connection
point locations.
For Thermal Dynamics components it is recom-
mended 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 connection point must be 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 pro-
tection.
3. The cutting machine frame is then connected to the
“Star” point using 1/0 AWG (European 50 mm 2 ) or
larger wire.