Wire Feeder Setup; Electrode And Work Leads - Electrode Negative Applications; Voltage Sensing At The Workpiece; Wire Drive Gear Ratio (High Or Low Speed - Lincoln Electric POWER WAVE SVM135-B Service Manual

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ELECTRODE AND WORK LEADS —
ELECTRODE NEGATIVE APPLICATIONS
When negative electrode polarity is required, such as
in some Innershield™ applications, install as above,
except reverse the output connections at the power
source (electrode cable to the negative (-) stud, and
work cable to the positive (+) stud). See Figure A.4.
VOLTAGE SENSING AT THE WORK-
PIECE
A four-pin voltage sense lead connector is located
beneath the output stud cover. In certain installa-
tions, where the work connection is poor, arc perfor-
mance may be improved by the use of an external
voltage sensing lead. Contact the factory for informa-
tion on connecting and using this feature.
FIGURE A.4 — ELECTRODE NEGATIVE
APPLICATION.
POWER WAVE
TO WORK

WIRE FEEDER SETUP

WIRE DRIVE GEAR RATIO (HIGH OR
LOW SPEED)
The speed range capability and drive torque of the
Power Feed 10 wire drive can be easily and quickly
changed by changing the external drive gear. The
Power Feed 10 is shipped with both a high speed
and a low speed gear. As shipped from the factory,
the low speed (high torque) gear is installed on the
feeder. If this is the desired gear ratio, no changes
need to be made.
INSTALLATION
SELECTING THE PROPER GEAR RATIO
See the Technical Specifications at the front of this
section for feed speed and wire size capabilities with
high and low speed gear ratios. To determine
whether you should be using the high or low speed
ratio, use the following guidelines:
- If you need to operate at wire feed speeds greater
than 800 IPM (20 m/m), you will need to install the
high speed gear (large, 30 tooth, 1.6 inch diameter
gear).
- If you need to operate at wire feed speeds less than
800 IPM (20 m/m), you should use the low speed
gear (small, 20 tooth, 1.1 inch diameter gear).
Using the low speed ratio will provide the maximum
available wire driving force. Note: If you are feeding
only small diameter wires you may, at your option,
install the high speed ratio.
CHANGING THE WIRE DRIVE RATIO
Changing the ratio requires a gear change and a
switch position change located on the feed head PC
Board. The Power Feed 10 is shipped with both a
high speed and a low speed gear. As shipped from
the factory, the low speed (high torque) gear is
WIRE
installed on the feeder. For identification purposes,
FEEDER
the low speed (high torque) gear has 20 teeth and is
1.1 inches in diameter. The high speed gear has 30
teeth and is 1.6 inches in diameter. See Figure A.5.
FIGURE A.5 — CHANGING WIRE DRIVE RATIO.
POWER WAVE 455/POWER FEED 10
PHILLIPS DRIVE
HEAD SCREW GEAR
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WIRE
FEEDER