10
Adjustment of tungsten with torch PT-8
Set switch
F
to mid position and operate torch switch or foot switch. HF will start. Check whether HF
sparks over to nozzle on all sides. If not, readjust tungsten electrode of torch. This adjustment is very im-
portant and should be repeated regularly.
The electrodes of all other torches are centred by the insulation tube inside the torches automatically.
B. TIG-Schweißen
1. Substitute the plasma-torch by an appropriate TIG-torch.
2. Open cylinder valve and adjust gas flow rate to the value desired.
3. Switch main switch
F
on. (Fan and water pump will start. Lamp
d
will light.
4. Set switch
i
to (4-stroke) or (2-stroke)
5. Set switch
k
to
6. Set switch
f
to
7. Turn potentiometer
c
counterclockwise to 0
8. Keep button
E
depressed and adjust welding current. Amperage is preset at potentiometer a and can
be read from ammeter
D
.
C. TIG-Pilot-Welding
Connection of the plasma torch and adjustment of power supply is done as described under paragraph A.
Only the plasma torch has to be modified as follows:
Redrill the aperture of the torch tip to a diameter of 5,5 - 6,0 mm and slide out the electrode until it protru-
des about 1,5 mm beyond the tip face. Potentiometer
c
must be turned to 0 during this welding procedure.
D. Switching off Plasma- and TIG-Pilot-Welding
To switch off the pilot arc, set switch
f
to mid position.
Wait about 15 sec. until the post flow time for the pilot gas has passed, before switching off the machine
with the main switch. During this time the electrode can cool down protected against oxidation by the pilot
gas.
Even in case of an emergency stop command by a automatic control the post flow process will be initia-
ted.
Installation
Summary of Contents for PLASMAWELD 202
Page 24: ...24 Wiring diagram...
