Tweco Thermal Arc TA 500 - Manual (Page 27)

Manual No 0-0470 3-1 Operation
SECTION 3: OPERATION
3.1 Operating Controls
AC POWER
START
3
4
5 6
7
8
9
10 1
2
STOP
D.C. AMPERES
0 200 400 600 800 1000
3
9
5
4
1
2
6
7
8
SET
RUN
PURGE ON
OFF
READY
NORMAL
PIERCE
SOFT
START
CURRENT CONTROL
Figure 3-A Operator Control Panel
1. Ammeter (AM)
Indicates amperage supplied to torch.
2. AC POWER Indicator (LT3)
Red light indicates that Primary AC power is be-
ing supplied to the system.
NOTE: Fan is on when light is on.
3. “Ready” Indicator (LT4)
Amber light indicates that the ON/OFF switch is
in the ON position and that all system requirements
are met.
4. ON/OFF Switch (SW1)
Move up to ON position to turn on HE 200 and
activate control circuits. Move down to OFF posi-
tion to deactivate control circuits.
5. CURRENT CONTROL Knob
Adjust knob while cutting until desired current is
read on Ammeter.
6. STOP Switch (SW3)
Red STOP button is pressed to stop the cutting cycle
and turn off the power to the torch.
7. RUN/PURGE/SET Switch (SW6)
Move to the PURGE (center) position to purge the
plasma gas in the torch. SET (down) position is
used to set the plasma and secondary flow rates.
The Power Supply cannot be actuated in either the
PURGE or SET position but will operate normally
in the RUN (up) position.
8. NORMAL/SOFT START/PIERCE Switch (SW2)
This three-way switch is used to set the mode of
operation of the Power Supply. Most cutting will
be done in the NORMAL (up) position. For rapid
piercing the PIERCE (down) position gives a cur-
rent surge when the torch is first started. The SOFT
START (center) position is a low power start which
is useful in prolonging the orifice life of small tips.
9. START Switch (SW2)
Green START button is pushed to initiate the cut-
ting cycle.