Longevity WeldAll 160PI/200PI/250PI - Manual (Page 19)

160/200/250PI AC/DC Series IGBT Machine
www.LWELD.com
Knob Functions:
POWER SWITCH: Dual throw switch is located on the back of the unit. (NOTE: When finished welding or
cutting, always let the machine's fan run for a minute or two to cool the machine before turning the power
switch off.)
POWER LAMP: This light illuminates while the unit is powered on.
OVER CURRENT/OVER HEAT WARNING LAMP: (lightning bolt) Illuminates when the duty cycle has
been exceeded or the machine has overheated due to improper ventilation. Discontinue use until lamp goes out.
Allow the fan to continue to run. Once lamp goes out, you may resume using the unit.
DIGITAL DISPLAY: The display shows the approximate welding amps controlled by base current.
FUNCTION POSITION SWITCH: Selects Stick welding, plasma Cutting, or TIG welding.
AC/DC SWITCH: Use AC for Aluminum and Magnesium, DC for all other metals. Plasma cutting must be
performed in DC mode.
BASE CURRENT.: (Base Current 5-### amps welding, 20-### amps plasma cutting) This is the primary
amperage control for all functions. In TIG pulse mode, this knob sets the base current (low) amperage. For TIG
pulse adjustment, set the Pulse current knob full left, then set the desired base current (low amperage) using the
Base current knob. The digital display will show the amp setting. Next use the Pulse current control to set the
high amperage of the high pulse cycle. As you turn the Pulse current control to the right the digital display will
increase, showing your pulse peak amps.
FOOT CONTROL: The Foot Control overrides the Base Current knob. The Base Current knob does not
function when the Foot Control is plugged into the machine. When the Foot Control is depressed, the welding
current starts. Base Current will increase with pedal depression. In pulse mode, the Foot Control changes both
the base (low) amps and pulse (high) amps, just as turning the Base Current knob would. The Foot Control
Knob can be used to reduce the maximum current allowed by the Foot Control. Example for 200PI: Placing
the knob to the 5 position will limit the maximum amps to approximately 20 amps, the 6 position approximately
50 amps, 7 about 90 amps, 8 about 150, and the 9 position 200 amps. This allows the Foot Control to be less
sensitive.
PULSE ON/OFF SWITCH: Enables pulsed AC and DC TIG welding. Pulse welding is an advanced welding
technique that allows fine control over the welding process. Pulse Mode gives the same effect as quickly
moving the Base current knob back and forth between a low and high amp setting, at a rate that would be
impossible to do by hand. To set the high and low pulse currents, first set the Pulse current knob full left, then
set the desired base current (low amperage) using the Base current knob. The digital display will show the amp
setting. Next use the Pulse current control to set the high amperage of the high pulse cycle. As you turn the
Pulse current control to the right, the amperage on the digital display will increase, showing your pulse peak
amps.