Valley FABRICATOR 251, Руководство по обслуживанию

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4-4 August 22, 2008
FABRICATOR 251 SERVICE MANUAL
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25 50 75 100 125 150 175 200 225 250 275 300 325
Cu rr ent (Amps)
Wi
r
e Speed (IPM)
(.030 - AL)(.035 - AL)
(.047 - AL)
Art # A-07453
ALUMINUM
Figu r e 4-5: Aluminum - AMP to IPM Conve r sion
Thermal Overload
The c r itical components fo r the r mal p r otection a r e the r ectifie r stack and the t r ansfo r me r , which a r e fitted with
the r mal ove r load cut out devices. If the ove r load is activated then the machine should be left to cool fo r app r oximately
15 minutes befo r e r esuming welding. If the Powe r Sou r ce is ope r ated within its duty cycle, the the r mal ove r load
will not activate. Refe r to section 2.09 fo r an explanation of duty cycle and section 2.10 fo r the powe r supply
specifications.
Wirespeed Control
The Wi r espeed Cont r ol knob cont r ols the welding cu rr ent via the elect r ode wi r e feed r ate, i.e. the speed of the wi r e
feed moto r .
Coarse Voltage Control Switch
The Coa r se Voltage Cont r ol sets the voltage level to the welding te r minals as it is r otated in eithe r di r ection. Clock
wise to inc r ease.
Fine Voltage Control Switch
The Fine Voltage Cont r ol switch inc r eases the voltage (in smalle r inc r ements than the Coa r se switch) as it is
r otated in eithe r di r ection. Clock wise to inc r ease.
CAUTION
The Coa r se & Fine Voltage Cont r ol switches MUST NOT BE SWITCHED du r ing the welding p r ocess.