Page 1
OM-1078 142 862L March 2005 Processes MIG (GMAW) Welding Description Weld Control For Spoolmatic Gun WC−115A Visit our website at www.MillerWelds.com...
Page 2
We know you don’t have time to do it any other way. That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality.
Page 3
TABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING ....... . . 1-1.
Page 5
SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som _8/03 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. This group of symbols means Warning! Watch Out! possible Y Marks a special safety message.
Page 6
ARC RAYS can burn eyes and skin. BUILDUP OF GAS can injure or kill. D Shut off shielding gas supply when not in use. Arc rays from the welding process produce intense visible and invisible (ultraviolet and infrared) rays D Always ventilate confined spaces or use that can burn eyes and skin.
Page 7
1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can cause injury. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables.
Page 8
1-5. Principal Safety Standards Safety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1, Boulevard, Rexdale, Ontario, Canada (phone: from American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126 800−463−6727 or in Toronto 416−747−4044, website: www.csa−in- (phone: 305-443-9353, website: www.aws.org). ternational.org).
Page 9
SECTION 2 − CONSIGNES DE SÉCURITÉ − À LIRE AVANT UTILISATION som_fre 8/03 2-1. Signification des symboles Signifie « Mise en garde. Faire preuve de vigilance. » Cette procédure présente des risques identifiés par les symboles adjacents aux directives. Ce groupe de symboles signifie « Mise en garde. Faire preuve de vigi- lance.
Page 10
LES RAYONS DE L’ARC peuvent cau- LES ACCUMULATIONS DE GAZ peu- ser des brûlures oculaires et cuta- vent causer des blessures ou même nées. la mort. Le rayonnement de l’arc génère des rayons visibles et D Couper l’alimentation en gaz protecteur en cas de invisibles intenses (ultraviolets et infrarouges) suscep- non utilisation.
Page 11
2-3. Autres symboles relatifs à l’installation, au fonctionnement et à l’entretien de l’appareil. Risque D’INCENDIE OU D’EXPLO- LES ORGANES MOBILES peuvent SION causer des blessures. D Ne pas placer l’appareil sur une surface inflam- D Se tenir à l’écart des organes mobiles comme les mable, ni au−dessus ou à...
Page 12
2-4. Principales normes de sécurité Safety in Welding, Cutting, and Allied Processes, norme ANSI Z49.1, Rexdale, Rexdale (Ontario) Canada M9W 1R3 (téléphone : (800) de l’American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126 463−6727 ou à Toronto : (416) 747−4044, site Web : www.csa−interna- (téléphone : (305) 443−9353, site Web : www.aws.org).
Page 13
SECTION 3 − INSTALLATION 3-1. Specifications DC Output For AC Input Power Welding Power Weld Circuit Control Overall Dimensions Weight 1-Phase Source Type Rating Circuit Length: 12-1/4 in Constant Current 100 Volts, 200 (311 mm) 115 Volts, (CC) Or Constant Amperes, 100% Width: 9-1/4 in 20 lb...
Page 14
3-4. Gun/Feeder Connections Gun Control Receptacle Weld Power Grommet Regulator/Flowmeter Gas Fitting Left Side Wrapper Off Tools Needed: 5/8, 3/4 in Ref. 149 966-C / Ref. 149 549-B / Ref. S-0621-C OM-1078 Page 10...
Page 15
3-5. Installing Voltage Sensing Lead And Motor Start Control Adjustment Center Baffle Circuit Board PC1 Jumper Plug Receptacle RC3 Internal (INT) and external (EXT) INT. EXT. are stamped on PC1 just above RC3. Unit is shipped with jumper plug in internal (INT) position. To install voltage sensing lead, proceed as follows: Front...
Page 16
3-6. Weld Cable Connections Grommet Positive (+) Weld Output Terminal On Welding Power Source Reed Switch Weld Cable (Customer Supplied) Weld Cable Terminal Weld Power Cable From Gun/Feeder Weld Power Grommet Route weld cable and weld power cable as shown. Be sure lug on weld cable terminal and lug on Front Panel Rear View...
Page 17
3-8. Optional Connections For Input Power From Welding Power Source Input Power Cord And Plug PLG4 Cut plug off. Individual Leads Strip a small amount of insulation from cord and from each of the three leads. Pins (Part No. 134 731, Not Supplied) Crimp a supplied pin to each of the three leads.
Page 18
3-9. Contact Closure Connections A. 14-Pin Plug Information For Standard Contact Closure Connections Pin* Pin Information Contact output signal. Input control to energize weld contactor. Contact closure to A completes 24 volts ac contactor control circuit. *The remaining pins are not used. B.
Page 19
C. Optional Contact Closure Connections For Welding Power Sources Requiring Contact Closure Contact Closure Interconnecting Cord 14-Pin Plug PLG5 Cut plug off. Twistlock Plug (Part No. 039618 Or Hubbell 7102-CM4 Or Equivalent) Install customer-supplied twistlock plug onto contact closure interconnecting cord. Polarity is not important.
Page 20
3-10. Typical MIG Connections And Settings Using Weld Control And Spoolgun Typical Settings For 4043 (.035) Tools Needed: Aluminum On 1/8 in Material: 3/4 in Note Coarse Range and Weld Process switch settings. Connect to unused Work contactor terminal. Plug and sensing lead not used in this application.
Page 21
SECTION 4 − OPERATION 4-1. 115 Volt Model Controls Run-In Speed Control Use control to select welding wire speed before arc initiation. After arc initiation, the wire feed speed is controlled by the Wire Speed control on the gun/feeder. Power Switch Use switch to turn unit On and Off.
Page 22
5-1. Overload Protection If fuse F1 opens, the weld control shuts down. To check or change F1, proceed as follows: Fuse Holder Cover Fuse (See Parts List For Fuse Size) Push And Turn Pull Out And Push And Turn Replace F1 Ref.
Page 24
SECTION 7 − PARTS LIST Hardware is common and not available unless listed. 143 328-K Figure 7-1. Complete Assembly Of WC-115A OM-1078 Page 20...
Page 25
Part Mkgs. Description Quantity Figure 7-1. Complete Assembly Of WC-115A ....126 415 Clamp, Saddle ..........
Page 27
Effective January 1, 2005 (Equipment with a serial number preface of “LF” or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other Warranty Questions? guarantees or warranties expressed or implied. Call LIMITED WARRANTY − Subject to the terms and conditions Induction Heating Coils and Blankets below, Miller Electric Mfg.