Tweco Merlin 6000 Master PS - Manual (Page 24)

INSTALLATION PROCEDURES 3-6 Manual 0-2568
A-02971
+
_
Meter set to
VAC setting
Machine
Earth Ground
Neutral
Line (Hot)
100W
Light Bulb
115 or 230VAC
WARNING
Use extreme caution. This
test uses live voltage.
115VAC: 3.0 VAC
230VAC: 1.5 VAC
V ~
V
~
VR COM A
Ground Testing
2. Increasing the ground rod length beyond 20 - 30 ft
(6.1 – 9.1 m) does not generally increase the effective-
ness of the ground rod. A larger diameter rod which
has more surface area may help. Sometimes keeping
the soil around the ground rod moist by continuously
running a small amount of water into it will work.
Adding salt to the soil by soaking it in salt water may
also reduce its resistance. When these methods are
used, periodic checking of the ground resistance is re-
quired to make sure the ground is still good.
D. Routing Of Torch Leads
1. To minimize RF interference, position torch leads as
far as possible from any CNC components, drive mo-
tors, control cables, or primary power lines. If cables
have to pass over torch leads, do so at an angle. Do
not run the plasma control or other control cables in
parallel with the torch leads in power tracts.
2. Keep torch leads clean. Dirt and metal particles bleed
off energy, which causes difficult starting and in-
creased chance of RF interference.
3.10 Plasma And Secondary Gas
Connections
The Master Power Supply provides the liquid cooling and
gases to support operation of the Liquid Cooled Maxi-
mizer 300 Torch.
NOTE
Refer to the Liquid Cooled Maximizer 300 Torch
Instruction Manual (Cat. No. 0-2573 for informa-
tion on plasma and secondary gas selection and
requirements.
The following are available gases that can be used with
the Liquid Cooled Maximizer 300 Torch:
Plasma Gases: Compressed Air, Oxygen (O
2
), Nitro-
gen (N2), or Argon/Hydrogen (Ar/H2)
Secondary Gases: Compressed Air, Nitrogen (N2),
Carbon Dioxide (CO
2
), or Tap Water (refer to follow-
ing note)
Plasma and secondary requirements vary depending on
the application. The plasma and secondary gases are
connected to the rear panel connections of the power sup-
ply. Depending on the options installed and the source
of the gases will determine the installation of filters and
regulators.
This sub-section includes information for connecting the
gas supplies to the Power Supply. The information is
grouped in paragraphs for different types of gases and
options per the following:
A. Using Shop Air
B. Using High-Pressure Gas Cylinders
C. Using Water Secondary
D. Plasma and Secondary Gases With Gas Control
Option
Refer to the appropriate paragraph(s) for the desired ap-
plication to be used.
A. Using Shop Air
An inline pneumatic dryer/evaporator type air filter, ca-
pable of filtering particulates to at least 5 microns with a
dew point of 35°F (1.7°C), is required when using air from
a compressor. This type filter will insure that moisture,
oil, dirt, chips, rust particles, and other contminants from
the supply hose do not enter the torch. For highly auto-
mated applications, a refrigerated drier plus a particu-
late filter may be used to chill the air to remove all mois-
ture.