General description, Control board, Theory of operation – Lincoln Electric SVM143-A User Manual
Page 42
E-2
THEORY OF OPERATION
DH-10
E-2
GENERAL DESCRIPTION
The DH-10 is a 42 VAC, dual head, 4-roll wire feeder.
A single control for each head is utilized, with dual
procedure presettablility of wire feed speed and arc
voltage. The DH-10 models have controls providing
keypad or remote selectability of wire drive head and
either one or two procedures for each head. Also
offered are four independently selectable gun trigger
modes for each head procedure; cold feed, 2-step and
4-step trigger, and spot weld. The user can also pre-
set timers for each head procedure: preflow, postflow,
burnback, and spot weld times. Five selectable wire
feed acceleration rates can be used to optimize arc
starting. Refer to Figure E.1.
FIGURE E.1 — GENERAL DESCRIPTION.
CONTROL BOARD
VOLTS
ENCODER
INPUT
CABLE
RECEPTACLE
RIGHT
WIRE DRIVE
RECEPTACLE
LEFT
WIRE DRIVE
RECEPTACLE
TO GUN TRIGGER
AND
DUAL PROCEDURE
TO GUN TRIGGER
AND
DUAL PROCEDURE
WIRE
DRIVE
MOTOR
WIRE
DRIVE
MOTOR
WFS
ENCODER
DISPLAY
BOARD
CURRENT SENSING
REED SWITCH
GROUND
LEAD
PROTECTOR
KEYPAD
SOLENOID
TACH FEEDBACK
42VDC
TACH FEEDBACK
SOLENOID