Lincoln Electric IM910 manual Figure B.4 CC Wire Speed Setting

B-9 OPERATION B-9

S E T T I N G A R C S E N S I N G W I R E F E E D S P E E D FOR CONSTANT CURRENT OPERATION

When using a constant current (formerly variable voltage) power source, welding performance is improved using arc sensing wire feed speed (CC operation). In this wire feed mode the wire speed increases if arc voltage increases, and decreases if arc voltage decreases, but remains con- stant at any specific voltage level.

The LN-15 permits accurate presetting of the desired wire feed speed, for the desired arc voltage to be used, by setting the Wire Feed Speed in the following manner before welding:

a.Activate press and spin during power up and change to the CC mode. See “Changing the CV/CC mode or WFS units” in this Operation Section.

FIGURE B.4 CC WIRE SPEED SETTING

b. Referring to the graph located above the Mode switch (also shown in Figure B.4):

1.Select the horizontal line representing the DE- SIRED IN/MIN. for the welding procedure. (See example arrow line for 375 in/min.)

2.Select the diagonal line representing the ARC VOLTS to be used for the welding procedure. (See example arrow line for 29 volts.)

3.Determine the vertical line representing the CC WIRE SPEED SETTING where the above two lines cross. (See example arrow line for 450.)

c.Adjust the WFS display to the value determined in Step (3) above (450 for example used).

The wire will feed at the DESIRED IN/MIN speed when the welding power source is set to the arc voltage to be used for the weld procedure (375 in/min. at 29V for example used).

The CC wire speed setting graph is shown in TABLE B.1, giving the Wire Speed dial setting required for the DESIRED IN/MIN and ARC VOLTS used for the welding procedures:

TABLE B.1 CC WIRE SPEED SETTING

				Arc Volts Used
Desired
In/Min	16	18	20	22	24	26	28	30	32	34
50	109	97	88	80	73	67	63	58	55	51
60	131	117	105	95	88	81	75	70	66	62
70	153	136	123	111	102	94	88	82	77	72
80	175	156	140	127	117	108	100	93	88	82
90	197	175	158	143	131	121	113	105	98	93

100219 194 175 159 146 135 125 117 109 103

110241 214 193 175 160 148 138 128 120 113

120263 233 210 191 175 162 150 140 131 124

130284 253 228 207 190 175 163 152 142 134

140306 272 245 223 204 188 175 163 153 144

150328 292 263 239 219 202 188 175 164 154

160350 311 280 255 233 215 200 187 175 165

170372 331 298 270 248 229 213 198 186 175

180394 350 315 286 263 242 225 210 197 185

190416 369 333 302 277 256 238 222 208 196

200438 389 350 318 292 269 250 233 219 206

210459 408 368 334 306 283 263 245 230 216

220481 428 385 350 321 296 275 257 241 226

230503 447 403 366 335 310 288 268 252 237

240525 467 420 382 350 323 300 280 263 247

250547 486 438 398 365 337 313 292 273 257

260569 506 455 414 379 350 325 303 284 268

270591 525 473 430 394 365 338 315 295 278

280613 544 490 445 408 377 350 327 306 288

290634 564 508 461 423 390 363 338 317 299

300656 583 525 477 438 404 375 350 328 309

310678 603 543 493 452 417 388 362 339 319

320700 622 560 509 467 431 400 373 350 329

330642 578 525 481 444 413 385 361 340

340661 595 541 496 458 425 397 372 350

350681 613 557 510 471 438 408 383 360

360700 630 572 526 484 450 420 394 370

380	666	604	554	512	472	444	416	392
400	700	636	584	538	500	466	438	412
420		668	612	566	526	490	460	432
440		700	642	592	550	514	482	452
460			670	620	576	536	504	472
480			700	646	600	560	526	494
500				674	626	584	546	514
520				700	650	606	568	536
540					676	630	590	556
560					700	654	612	576
580						676	634	598
600						700	656	618
620							678	638
640							700	658
660								680
680								700
700

CCSpeed Setting = Desired IPM X 35 Arc Volts

LN-15 CONTROL CABLE MODEL (CE)