Wire Drive Speed Range Selection; Connecting Wire Drive Unit To Control Box; Electrode Routing; Control Speed Range Setting - Lincoln Electric SVM143-A Operator's Manual

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Connecting Wire Drive Unit to Control Box

One head to control cable assembly is required for each
head being used; however, only one electrode cable is
required if an electrode cable jumper (provided) is con-
nected between the two heads. The Head to Control
cable assemblies are available in two types:
K1498-"L" - Includes a control cable with 14-pin ms-style
connectors on each end, and a 3/0 weld
cable (rated 600 amps, 60% duty cycle) to
route between the wire drive and the control
box. Available in lengths "L" of 16 ft (4.9 m)
and 25 ft (7.6 m).
K681-"L" - Same as K1498, but does not include weld
cable. Available in lengths "L" of 12 ft (3.6
m), 16 ft (4.9 m) and 25 ft (7.6 m).
1. Making certain the cables are protected from any
sharp corners which may damage their jackets,
mount the cable assembly along the boom so the
end with the female amphenol connector pins is at
the wire feed unit.
2. Connect the 14-socket cable connectors to the mat-
ing receptacles on the back of the wire feed unit
connection box. Feeder Head 1 uses the left recep-
tacle and Feeder Head 2 uses the right receptacle,
when facing the front of the wire drive.
3. At the same end, connect the electrode lead to the
1/2 in. connection bolt on the rear of the left wire
drive head feed plate. If only one electrode cable is
being used, comparable size electrode cable
jumper (provided) must be connected between the
two heads.
4. At the control box end, connect the 14-pin connec-
tors of the cables to the mating receptacles on the
bottom of the control box. Feeder Head 1 should
be connected to the left receptacle and Feeder
Head 2 should be connected to the right receptacle,
when facing the front of the control box.
5. At the control box current sensor, slip the cover box
up off the sensor and connect the electrode cable(s)
to the top bolt connection.

Electrode Routing

The electrode supply may be either from reels, Readi-
Reels, spools, or bulk packaged drums or reels.
Observe the following precautions:
1. The electrode must be routed to the wire drive
unit so that the bends in the wire are at a mini-
INSTALLATION
mum, and also that the force required to pull the
wire from the reel into the wire drive unit is kept
at a minimum.
2. The electrode is "hot" when the gun trigger is
pressed and must be insulated from the boom
and structure.
3. If more than one wire feed unit shares the same
boom and are not sharing the some power
source output stud, their wire and reels must be
insulated from each other as well as insulated
from their mounting structure.
WIRE DRIVE SPEED RANGE
SELECTION
The rated speed and wire size range for each wire
drive head is shown in Specifications in the front of
this section.

Control Speed Range Setting

The speed range is set up to match each wire feed
head connected to the DH-10 control by properly set-
ting the switch (S2) code on the control board inside
the control box. See Operation, Setting the DIP
Switches for setting instructions.
Double Header (DH) Wire Drive Ratio
Selection
The Double Head type drives include two external
gear sizes; a 1 in. diameter gear and a 1-1/2 in.
diameter gear. The smaller gear provides the low
speed range ratio, and the larger gear provides the
high speed range ratio per Specifications in the front
of this section.
The following procedure is for changing ratio of the
DH drive:
1. Pull open the Pressure Door.
2. Remove the Phillips head screw retaining the pin-
ion gear to be changed and remove the gear. If
the gear is not easily accessible or difficult to
remove, remove the feedplate from the gear box.
DH-10
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