Lincoln Electric IM812-A manual Making a Weld, Figure B.4 Vvcc Wire Speed Setting

B-5 OPERATION B-5

				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

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.

WARNING

The electrode is electrically “hot” when the power source is on. The gun trigger controls wire feed only.

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LN-35