Lincoln Electric IM637-A 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

XXXX XXXX XXXX XXXX

Output	Gas
Control	Regulator
Knob	Knob
Consumable	PRO-CUT 55
Storage
(behind
door)	OFF
	Input
Torch	Power
	Switch
Connector
	Work
	Cable

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.

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

-The fan should start.

-The pre-charge circuit will operate for 4 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.

-If any of the other LED’s remain lit and steady, refer to the troubleshooting section of the manu- al.

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

2. GAS PRESSURE SETTINGS

•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.

3. PREPARING TO CUT

•When ready to cut, place the torch near the work, 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 immediately.)

-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 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 45 amps or damage 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