Lincoln Electric SVM179-B service manual Wire Feed Speed, CC Operation See Figure B.2 or

B-5 OPERATION B-5

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Wire Feed Speed, CC Operation (See Figure B.2 or

See Table B.2)

When Across the Arc models are operated with CC power sources, the wire feed speed changes as the arc voltage changes. When the arc voltage increases, the wire feed speed will increase; and when the arc voltage decreases, the wire feed speed will decrease.

To preset the wire feed speed on CC power sources:

1.Set the Wire Feed Mode switch inside the LN-25™ PRO to "CC".

2.Refer to the Figure B.2 graph for the setting for the wire feed speed knob setting. Select the horizon- tal line representing the Desired Wire Feed Speed. (See Figure B.2 arrow for 375 in/min.)

3.Select the diagonal line representing the Arc Volts. (See Figure B.2 for 29 volts.)

4.Determine the vertical line representing the CC representing the CC Wire Feed Speed setting where the above two lines cross. (See Figure B.2 arrow line for 450.) Set the LN-25™ PRO wire feed speed knob to this value.

CCWFS dial setting = desired WFS x 35

	Arc Volts
Example:	375 in/min. (Horizontal Line) x 35
	29 Arc Volts (Diagonal Line)
	= 13125 = 452-5 (Vertical Line)
	29

Set the Wire Speed Control at 450”/min., and when welding at 29 volts the average actual speed should be approximately 375“/min.

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	FIGURE B.2
700	3533 V
650
	31
600	29
550	27
500	25
450	23
	21
400	19
350	17
300	15

250

200

150

100

50											600	650	700
50	100	150	200	250	300	350	400	450	500	550

CC

LN-25™ PRO