Lincoln Electric DC-655 service manual

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

B-4 B-4

OPERATION

CONTROLS AND SETTINGS

All operator controls and adjustments are located on the case front of the DC-655. Refer to Figures B.1, and B.2 and corresponding explanations.

8	2	9
	3

1

DC-655

7 4 5 6

FIGURE B.1 CONTROL PANEL CONTROLS

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

1.INPUT POWER ON/OFF SWITCH - This tog- gle switch turns the machine on or off. Putting the

switch in the ON position energizes the

machine’s input contactor applying input power to the machine. Switching the switch to the OFF position de-energizes the input contactor. This switch is also used to reset a machine shutdown. (See Machine Shutdown section)

2.PILOT LIGHT - When the power switch is in the ON position the machine’s white pilot light will illu- minate. If the input contactor de-energizes the machine in a shutdown situation, the pilot will still illuminate. In this situation it will be necessary to reset the machine by switching the power switch to the OFF then ON position. (See Machine Shutdown section)

3.OUTPUT CONTROL - This control provides continuous control of the machine’s output from minimum to maximum as it is rotated clockwise. The CV mode voltage range of control is 13 to 44V. The CC mode current range of control is 50 to 815A.

4.OUTPUT TERMINALS ON/REMOTE - When this switch is in the REMOTE position, the DC-655’s output terminals will be electrically “cold” until a

remote device such as a wire feeder closes the #2 and #4 circuit in the MS-receptacle or terminal strip. When this switch is in the ON position the machine’s output terminals will be electrically energized all the time.

5.LOCAL/REMOTE CONTROL SWITCH - When

this switch is set to the LOCAL position, con- trol of the output voltage is via the output control

on the DC-655’s control panel. When this switch is

set to the remote position, control is through a remote source such as a wire feeder via the #75, #76, and #77 leads in the MS-receptacle or termi- nal strip.

6.CC STICK/CV SUBARC/CV MIG MODE SWITCH - This switch selects the proper welding characteris- tics for the process being used:

CCStick provides a constant current output characteristic through the 50 to 815 amp range. The current is adjusted within this range by the Output Control dial. The open circuit (no load) voltage will be about 68 volts in this mode.

This mode is used for stick welding (SMAW) and CC air carbon-arc gouging, and employs a “Hot Start” feature and an Arc Force Control.

IDEALARC DC-655