Lincoln Electric POWER FEED 10M SINGLE/DUAL SVM172-A Service Manual page 102

E-2
TO POWER
SOURCE OR
SHUTDOWN
CONTROL BOX
INPUT
NETWORK
RECEPTACL
NETWORK
CONNECTOR
POWER FEED 10M FEED HEAD
The Power Feed 10M is a four roll, high performance,
digitally controlled, modular wire feeder that operates
on 40 VDC input power. It is designed to be a part of
a modular, multi-process welding system. Refer to
Figure E.2.
Network communications, intelligence, PC board
input power, and arc voltage feedback is received
and transmitted through the input network recepta-
cle. The internal network connector plug is utilized
when the Control Box is mounted directly to the wire
drive unit. See System Diagram A in this section.
The feed head drive control board processes the
information it receives from the various user operated
switches sch as the gun trigger, 2-step/4-step, and
cold inch switches and sends this information to
other system components. This information is evalu-
ated and the correct commands are transmitted to
the feed head drive. The feed head drive control
board then sends the signals to energize the active
compnents such as the solenoid and wire drive
motor. The tach feedback signal is processed on the
THEORY OF OPERATION
FIGURE E.2 – POWER FEED 10M FEED HEAD
LEAD #67A
CONTROL BOARD
DIP SWITCHES
GAS
COLD
SOLENOID
INCH/
GAS
PURGE
POWER FEED 10M SINGLE/DUAL
VOLTAGE
SENSE
LEAD #67
DRIVE
MOTOR
FEEDBACK
STATUS LED
GUN TRIGGER AND
DUAL PROCEDURE
RECEPTACLE
2-STEP/
4-STEP
NETWORK
OUTPUT
RECEPTACL
control board which regulates the motor armature
voltage so as to maintain the required wire feed
speed.
When the gun trigger is pulled, the voltage sense
board relays the electrode sense signal to the input
network receptacle for processing by the Control
Box.
The optional shutdown feature can be implemented
as a means of stopping the wire feeding in the event
that the water cooler (if used) is not turned on.
The STATUS LED is designed to blink a red and
green code if a fault should occur.
There is one DIP switch bank located on the wire
drive control board. It is labled S1 and is used to set
gear ratios, arc polarity, and for network indentifica-
tion purposes.
E-2
GEAR BOX
AND
CONDUCTOR
BLOCK
TACH