Miller VL-M4 Manuale d'uso - Pagina 26

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C. Description Of Controls (Use With Sections A And B)

Power Switch

Turn this switch ON to energize the VL-M4

Controller. For this unit to operate, 115 vac

must be supplied to this controller on pins G

and I of the 14-pin receptacle or on terminals

31 and 32 of terminal strip TE2. Turn switch

OFF to shut down the controller.

Wire Speed Control

This control adjusts the rate or speed at

which welding wire is fed into the weld.

Inch Up/ Inch Down Switches

These Inch or Jog switches are momentary

push buttons which energize only the drive

motor allowing for a cold wire jog. The weld-

ing wire jogs at the rate set by the Run-In

Speed Control. To advance the wire out of

the gun, press the Inch Down switch. To re-

OM-189 530 Page 22

tract the wire into the gun, press the Inch Up

switch.

Stop Switch

Press the Stop button to end the weld cycle.

Pressing this button initiates the Burnback

delay timer and the Burnback portion of the

weld cycle.

Start Switch

After pressing the Start button, flux valve

relay CR5 energizes immediately and sup-

plies 115 VAC to an external flux valve via

terminal 52 on terminal strip TE1 and termi-

nal 32 on TE2. Preflux time can be adjusted

by the knob on CR6. After this timer times

out, the flux valve relay remains energized

and the weld cycle begins. The weld contin-

ues until the stop button is pressed.

Output Control

This control adjusts the output of the welding

power source. If using a CV (Constant Volt-

age) machine, this control adjusts voltage. If

using a CC (Constant Current) machine, this

control adjusts current.

Weld Meters

The meters are provided to monitor the weld-

ing operation (either AC or DC). They are not

intended for exact voltage or amperage

measurements. The Voltage Sense lead

must be properly connected for the voltme-

ter to receive a signal and function correctly.