Lincoln Electric 10473, 10476, 10475, 10474 manual Limitations, Controls and Settings

B-4 OPERATION B-4

LIMITATIONS

Do not exceed output current and duty cycle rating of machine. Do not use the PRO-CUT 55 for pipe thaw- ing.

CONTROLS AND SETTINGS

Status	Reset	Gas
		Purge	Gas
Board
	Button	Button
Indicators			Regulator
			Gauge

kerf (cut) width, heat affected zone or travel speed as required.

• Push-in and hold the Purge button to check or set
the gas pressure. Pull the pressure regulator cap
out and turn it to set the pressure.
-	Adjust the gas regulator for 70 PSI for 25’ torch-
	es or 75 PSI for 50’ torches.
-	Release the Purge button.
-	The gas will immediately turn off. The pressure
	gage may show an increase in pressure after the
	air turns off but this is normal. Do NOT reset the
	pressure while the air is NOT flowing.
• When ready to cut, place the torch near the work,

Output

Control

Knob

Consumable Storage (behind door)

Torch

Connector

XXXX XXXX XXXX XXXX

Gas

Regulator

Knob

PRO-CUT 55

OFF

Input

Power

Switch

Work

Cable

make certain all safety precautions have been taken
and pull the trigger.
-	The air will flow for a preflow time of 2 seconds
	and the pilot arc will start. (This is true unless
	the machine is in postflow, then the preflow time
	is skipped and the pilot arc will start immediate-
	ly.)
-	The pilot arc will run for 3.0 seconds and shut off
	unless the arc is brought in contact with the work
	and the arc is transferred. Avoid excessive pilot
	arc time by transferring the arc to the workpiece
	quickly to improve parts life.
- When the arc is brought within 1/4" from the
	work piece: the arc will transfer, the current will
	ramp up to the setting on the control panel, and

When preparing to cut or gouge, position the machine as close to the work as possible. Make sure you have all materials needed to complete the job and have taken all safety precautions. It is important to follow these operating steps each time you use the machine.

•Turn the machine's ON/OFF POWER SWITCH to OFF position.

•Connect the air supply to the machine.

•Turn the main power and the machine power switch on.

-The fan should start.

-The pre-charge circuit will operate for 3 seconds, then the green "Power" LED should turn on.

-If the "SAFETY" LED is lit, push the "Reset" but- ton. If there is no problem, the LED will go off. If there is a problem, refer to Step "SAFETY LED" in this section.

•Be sure that the work lead is clamped to the work- piece before cutting.

•Set the output current control knob at maximum position for high cutting speed and less dross forma- tion. Reduce the current, if desired to reduce the

the cut can last indefinitely (or until the duty

cycle of the Pro-Cut is exceeded). Do not touch

the nozzle to the work when cutting with the

control panel setting above mid range or dam-

age to the consumables will result.

• Pierce the work piece by slowly lowering the torch

onto the metal at a 300 angle away from the opera-

tor. This will blow the dross away from the torch tip.

Slowly rotate the torch to vertical position as the arc

becomes deeper.

	TORCH AT 300 ANGLE
	TO PIERCE
	ROTATE TO
300	900 ANGLE TO CUT
	900
	VERTICAL ANGLE
	FOR CUTTING
	CUT

PRO-CUT 55