Lincoln Electric IM318-B manual Recommended SET-UP Procedures for NA-3/DC-1500, NA-5/DC-1500

OPERATING INSTRUCTIONS

General Set-Up Procedures When Using DC-1500 and Lincoln Automatic Head NA-5

(See chart below.)

1.Install the NA-5 per the information in the NA-5 op- erating manual (IM-305). Connect the NA-5 to the DC-1500 as described on the connection diagram.

2.Place the DC-1500 mode switch in the proper position according to the process and procedure to be used.

3.Place the machine/remote switch in remote.

4.Connect the work lead to the work or a suitable piece of scrap. Clip the end of the electrode to a sharp point.

5.Preset the Start (if used), Weld and Crater (if used) Controls to the wire speed and voltage specified in the procedure.

6.Make several test welds, readjusting the starting and stopping controls in the following order:

a.Set the Arc Striking Wire Speed and Volts Controls for optimum arc striking. For initial test welds, set the NA-5 arc striking wire speed control to 1/2 the weld wire feed speed and the arc striking voltage control 4 volts above the weld voltage.

b.If striking is still not satisfactory, see the NA-5 op- erating manual for information on the feed motor acceleration.

c.If installed, adjust the “Start Controls” to set the welding procedures for the time set on the timer to provide the bead size, penetration, or other factor as needed for the application. If not used, this board should be disconnected and the jumper plug re- placed.

d.If installed, adjust the “Crater Controls” to set the welding procedures for the set time after the stop button is pressed to provide the bead size or fill the crater as needed for the application. If not used, this board should be disconnected and the jumper plug replaced.

e.Set the “Burnback Time” to provide the stopping characteristics needed.

RECOMMENDED SET-UP PROCEDURES FOR NA-3/DC-1500, NA-5/DC-1500

			INNERSHIELD								SUBMERGED ARC
	Single			Single
	Innershield			Innershield											High Current
Equipment and	Stickout			Stickout		Twinarc		Single					Tiny Twin		Very Large
Control Settings	under 13/4”			over 13/4”		Innershield		Solid Wire		Tiny Twin 1/16(1)			Over 1/16		Puddle
Wire Feed Type	NA-3S			NA-3S		NA-3S
Control	or	NA-5		or	NA-5	or	NA-5	NA-3S	NA-5	NA-3S		NA-5	NA-3S	NA-5	NA-3S	NA-5
	NA-3N			NA-3N		NA-3N
NA-3S VV Board	CV	—		CV	—	CV	—	CV	—	CV		—	CV	—	VV	—
Mode Switch
NA-3 Inch Speed	2	—		2	—	2	—	2	—	2		—	2	—	2	—
Dial Setting (5)
NA-5 Arc Striking	—	(4)		—	(4)	—	(4)	—	(4)	—		(4)	—	(4)	—	(4)
Wire Speed(5)
NA-3 OCV Control(5)	(6)	—		(6)	—	(6)	—	(6)	—	(6)		—	(6)	—	6.5 - 7.0	—
NA-5 Arc Striking		(4)			(4)		(4)		(4)			(4)		(4)		(4)
Volts Control	—			—		—		—		—			—		—
NA-3 Start Board	(2)	—		Req’d (2)	—	Req’d (2)	—	(2)	—	(2)		—	(2)	—	(2)	—
DC-1500 Output
Control Switch —	Remote			Remote		Remote		Remote		Remote			Remote		Remote
Machine or Remote
DC-1500	CV			CV		CV		CV Submerged		CV			CV Submerged		NA-3S	NA-5
Mode	Innershield			Innershield		Innershield		Arc (3)		Innershield			Arc (3)
															CC	CVS
Switch
DC-1500 Output	Inoperative			Inoperative		Inoperative		Inoperative		Inoperative			Inoperative		Inoperative
Control

(1)Starting is best with “hot” starting. Start button is pressed with wire above the work.

(2)If an Na-3 start board is called for, refer to page 7 for details on how to set the controls. If an NA-3 start board is not required, it should be electrically disconnected and the jumper plug replaced.

(3)Some high speed welding procedures may perform better on the CV Innershield mode. Merely change the switch between CV Innershield and CV Submerged arc position and select the best welding.

(4)The NA-5 arc striking wire speed should initially be set at 1/2 the welding wire feed speed, and the NA-5 arc striking volts control 4 volts above the welding voltage. These controls can be adjusted as required for optimum arc striking.

(5)Exact dial setting depends on cable size and length, carbon size, etc.

(6)Set the OCV control to the same dial setting as the NA-3 voltage control. For initial test welds, choose the setting based on the table on page 7.

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