26 Chapter
IV
Dex PM3000
Full-Digital Control CO
2
/MAG/MIG Multi-FunctionWelding Machine
1.
Enter into the internal function, and adjust the welder panel knob to F15.Press the "Fn" key, and the
right nixie tube flashes.
2.
Turn the knob on the right panel to adjust the F15 parameters (shownin table 4-9), press the "Fn" key
to confirm, and F15 parameter setting is completed.
Table4-9 Parameter Table of Inching Wire Feeding Speed
Function Code
Unit
Adjusting Range
Step Length
Default Value
F15
m/min.
1.4
～
8 m/min.
0.1 m/min.
Automatic Matching
Logicdiagram of DC welding parameters.
As shown in the figure4-12.
Welding Torch
Switch
Gas Delivery
Welding
Voltage
Wire Feeding
Speed
(Welding Current)
Preflow
Gas
No-Load
Voltage
Arcing
Process
Welding Process
DC
Burn-
Back
Time
OFF
ON
OFF
ON
OFF
Arc-
Retreating
Process
Soft-
Start
Time
Transition
Time of Wire
Feeding Speed
Slow
Wire
feeding
DC
Chopping
Time
Burn-Back
Voltage
Transition
Time of Wire
Feeding Speed
Lagging G a s
Delivery
Fig.4-12Logic Diagram of DC Welding Parameters
（
4T
）
DC Burn-Back Voltage
（
F20
）
1.
Enter into the internal function, and adjust the welder panel knob to F20.Press the "Fn" key, and the
right nixie tube flashes.
2.
Turn the knob on the right panel to adjust the F20 parameters (shownin table 4-10), press the "Fn" key
to confirm, and F20 parameter setting is completed.
Table4- 1ParameterTable of DC Burn-Back Voltage
Function Code
Unit
Adjusting Range
Step Length
Default Value
F20
V
12
～
30V
0.1V
12V
DC Burn-Back Time (F21)
1.
Enter into the internal function, and adjust the welder knob to F21.Press the "Fn" key, and the right
nixie tube flashes.
2.
Turn the knob on the right panel to adjust the F21 parameters (shownin table 4-11), press the “Fn" key
to confirm, and F21 parameter setting is completed.
Table4- 2Parameter Table of DC Burn-Back Time
Function Code
Unit
Adjusting Range
Step Length
Default Value
F21
s
0.00
～
1.00s
0.01s
Automatic Matching
DC ChoppingTime
（
F22
）
Step
Step
Step
