Tweco Merlin 6000 Master PS - Manual (Page 18)

INTRODUCTION & DESCRIPTION 2-4 Manual 0-2568
2. Gas Pressure Interlock
A pressure switch acts as an interlock for the plasma
gas supply. If the supply pressure falls below mini-
mum requirements the pressure switch will open,
shutting off the power to the contactors, and the GAS
indicator will go out. When adequate supply pres-
sure is available the pressure switch will close, al-
lowing power to be resumed for cutting.
3. Thermal Interlock
Thermal overload sensors are located in the trans-
former, pilot resistors, and main heatsink in the power
supply. If one of these components is overheated the
appropriate switch will open, causing the tempera-
ture light to turn from green to red and shutting off
power to the main contactor. When the overheated
component cools down the switch will close again
and allow operation of the system.
G. Plasma Torches
Plasma torches are similar in design to the common au-
tomotive spark plug. They consist of negative and posi-
tive sections which are separated by a center insulator.
Inside the torch, the pilot arc is initiated in the gap be-
tween the negatively charged electrode and the positively
charged tip. Once the pilot arc has ionized the plasma
gas, the superheated column of gas flows through the
small orifice in the torch tip, which is focused on the metal
to be cut.
The Maximizer 300 Torch uses an internal closed-loop
cooling system. Deionized coolant is distributed from a
reservoir in the Power Supply through the coolant sup-
ply lead. At the torch, the coolant is circulated through
the torch tip and electrode, where the extra cooling helps
to prolong parts life. Coolant then circles back to the
power supply through the return lead. The Maximizer
300 also can use secondary gases such as compressed air,
nitrogen (N2), water, and carbon dioxide (CO
2
).
2.05 Options And Accessories
These items can be used to customize a standard system
for a particular application or to further enhance perfor-
mance. Torch accessories are listed in the separate Torch
Instruction Manual.
NOTE
Refer to Section 6, Parts Lists, for ordering infor-
mation.
A. RC6010 Remote Control
For mechanized systems, this low profile unit pro-
vides full CNC capability and allows the operator to
control all system functions from a remote location.
B. SC-10 or SC11 Standoff Controls
For machine torch systems, the Standoff Control auto-
matically finds height and maintains torch standoff
with a high speed torch lifter motor.
NOTES
Standoff Control SC10 must be used with the Re-
mote Control RC6010.
Standoff Control SC11 can be used without Re-
mote Control RC6010.
C. Computer Control Cable Kits
For interfacing the power supply with a computer or
auxiliary control device. Available in various cable
lengths.
D. High Pressure Regulators
Available for air, oxygen, argon/hydrogen, nitrogen,
CO
2
, and water.
E. High Flow Water Shield (HFWS) Assembly
Reduces arc glare, noise, and fumes during the cut-
ting process.
F. Two Stage Air Line Filter
Removes damaging contaminants as small as 5 mi-
crons from the plasma stream when using com-
pressed air.
G. Hour/Counter Meters
Meter assembly containing two meters. One meter
indicates the total number of hours and minutes that
the main cutting arc has been on to a maximum of
99999-59 (hours-minutes). The second meter counts
the number of times that the cutting arc has been
started to a maximum of 99999999 starts. Both meters
can be reset to zero.
H. Plasma/Secondary Gas Control (GC 3000)
A remote control to select one of various plasma and
secondary gases that can be connected to the Power
Supply. This allows one-time plumbing connections
of various gas/water supplies. The operator has com-
plete flexibility to quickly select the best plasma and
secondary gas combinations for the metal to be cut.