Wire Feed Shut Down Circuit; Changing The Gear Ratio - Lincoln Electric POWER FEED 10M SINGLE/DUAL SVM172-A Service Manual

A-10

WIRE FEED SHUT DOWN CIRCUIT

The wire feed shut down circuit is used to stop the wire
feed in the event of a fault. The most common use of
the circuit is with water cooled guns. A flow sensor is
connected to the circuit to protect the welding gun if the
water flow is interrupted.
The Power Feed 10M Single Wire Feeder has two
leads, 570A and 570B, located inside the wire drive
that are electrically common. If flow switch is used,
separate these leads and connect to normally closed
flow switch terminals when water is flowing. Connect
the flow sensor to these two leads.

CHANGING THE GEAR RATIO

The Power Feed 10M Single Wire Feeder wire drive
may be configured for either low speed or high speed,
depending upon the application. The wire feeders are
factory assembled for low speed operation and include
a gear for high speed operation.
Gear
Purpose:
Ratio
Best for most
GMAW and FCAW
welding. The low
speed gear ratio
Low Speed
provides the most
(1.27-20.3 m/m)
force for pushing
wires through long
guns or pulling
wire through con-
duits.
Suitable only for
High Speed
small diameter
(2.03-30.5 m/m)
wires operating at
high wire feed
speeds. Feeding
force is less.
INSTALLATION
Wire Size
Speed
Solid
Core
50-800 ipm
.025-3/32 in.
.035 - .120 in.
(0.6 - 2.4 mm)
(0.9 - 3.0
mm)
75-1200 ipm
.025-1/16 in
.(0.6 - 1.6 mm)
.035 - 5/64 in.
(0.9 - 2.0
mm)
POWER FEED 10M SINGLE/DUAL
FIGURE A.6
ITEM
1 Gear.
2 Screw holding feed plate to wire feeder.
3 Low speed position, screw holding feed
plate to wire feeder.
4 High speed position, screw holding feed
plate to wire feeder.
To change the gear ratio:
1. Turn off power at the welding power source.
2. Open the wire drive door.
3. Use a 3/16" Allen wrench to remove the screws
holding the feed plate to the wire feeder.
4. Use a Phillips screwdriver to remove the screw and
washers holding the gear to the shaft.
5. Remove the gear.
6. Lightly cover the shaft with engine oil or equivalent.
Install the desired gear onto the shaft.
7. Reassemble the screw and washers securing the
gear to the shaft.
8. Reassemble the screws in the appropriate position
for holding the feed plate to the wire feeder.
A-10
DESCRIPTION