Operation, Warning, B-5 making a weld – Lincoln Electric IM812-A User Manual

Page 16

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B-5

OPERATION

B-5

MAKING A WELD

SETUP

a. Connect work cable to metal to be welded. Work

cable must make good electrical contact to the
work. The work must also be grounded as stated
in “Arc Welding Safety Precautions.”

b. Check that the LN-35 is properly connected to the

power source for the polarity and process to be
used, and appropriate power source settings are
made for the procedure to be used. (Refer to
power source operating and connection
instructions.)

c. Place the LN-35 conveniently near the work area

in a location to minimize exposure to weld spatter
and to avoid sharp bends in the gun cable.

d. Connect the LN-35 Clamp Lead to work and set

Polarity Switch to same polarity as electrode.

e. Set WIRE FEED MODE switch to CV or CC, as

appropriate for the power source, then set the
proper DIAL RANGE and WIRE SPEED dial set-
ting for the proper wire feed speed per the
welding procedure:

For CV:

Set dial to the calibrated IN/MIN desired.

(Refer to Setting Constant Wire Feed Speed
Section.)

For CC:

Set dial to value determined from the CC

Wire Speed Graph for the DESIRED IN/ MIN
and ARC VOLTS to be used. (Refer to Setting
Arc Sensing Wire Feed Speed Section.)

NOTE:

If procedure permits a range of acceptable

arc voltage, use the middle of the range to
determine proper WIRE SPEED setting.

f. Be sure the proper contact tip for the wire size

being used is in the gun, and the gun is safe
from work contact.

g. Turn on the welding power source.

The electrode is electrically

hot

when the power

source is on. The gun trigger controls wire feed
only.

---------------------------------------------------------------------

LN-35

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

100

219

194

175

159 146 135 125 117 109 103

110

241

214

193

175 160 148 138 128 120 113

120

263

233

210

191 175 162 150 140 131 124

130

284

253

228

207 190 175 163 152 142 134

140

306

272

245

223 204 188 175 163 153 144

150

328

292

263

239 219 202 188 175 164 154

160

350

311

280

255 233 215 200 187 175 165

170

372

331

298

270 248 229 213 198 186 175

180

394

350

315

286 263 242 225 210 197 185

190

416

369

333

302 277 256 238 222 208 196

200

438

389

350

318 292 269 250 233 219 206

210

459

408

368

334 306 283 263 245 230 216

220

481

428

385

350 321 296 275 257 241 226

230

503

447

403

366 335 310 288 268 252 237

240

525

467

420

382 350 323 300 280 263 247

250

547

486

438

398 365 337 313 292 273 257

260

569

506

455

414 379 350 325 303 284 268

270

591

525

473

430 394 365 338 315 295 278

280

613

544

490

445 408 377 350 327 306 288

290

634

564

508

461 423 390 363 338 317 299

300

656

583

525

477 438 404 375 350 328 309

310

678

603

543

493 452 417 388 362 339 319

320

700

622

560

509 467 431 400 373 350 329

330

642

578

525 481 444 413 385 361 340

340

661

595

541 496 458 425 397 372 350

350

681

613

557 510 471 438 408 383 360

360

700

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

VV (CC) Speed Setting =

Desired IPM

X 35

Arc Volts

FIGURE B.4 VV(CC) WIRE SPEED SETTING

WARNING

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