ESAB Two Roll Drive Accessory Support Assembly Troubleshooting instruction

INSTRUCTIONS for

F-15-632

September, 2000

TWO ROLL DRIVE

ACCESSORY SUPPORT

ASSEMBLY

P/N 49V51

FEATURE/BENEFITS

■ This is the most rugged, time proven wire feed­ing mechanism on the market.

■ The wedge action of the patented feed roll
transfers drive torque to the welding wire
smoothly and efficiently.

■ Feef rolls are case hardened for longest pos­sible life.

■ The uni-pressure accessory support can quickly
and easily be mounted on any EH-10A or EH­10AD motor-gear units for feeding .030 through
1/8-in. diameter wire.

These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation and
safe practices for arc welding equipment, we urge you to read our booklet, "Precautions and Safe Practices for Arc
Welding, Cutting, and Gouging", Form 52-529. Do NOT permit untrained persons to install, operate, or maint ain this
equipment. Do NOT attempt to install or operate this equipment until you have read and fully understand these
instructions. If you do not fully understand these instructions, contact your supplier for further information. Be sure
to read the Safety Precautions on page 2 before installing or operating this equipment.

■ For reducing wire change and pressure reset­ting time - a quick release clapper with single
adjustment knob allows releasing and resetting
the feed rolls without disturbing the feed roll
pressure setting.

■ Available with “U” groove, Vee hard or serrated
“V” feed rolls and utilizing standard inlet and
outlet guide accessories, this drive is truly uni­versal in application. combination for your own
specific need.

Be sure this information reaches the operator.
Y ou can get extra copies through your supplier.

INSTALLATION AND OPERATION

A. INSTALLING THE FEED ROLL

To install the feed roll, proceed as follows:

1. Release the clapper on the accessory support
assembly (Figure 1) by disengaging the retainer
from the clapper fork.

2. Remove thumbscrew, bell washer and flat washer
from the feed roll shaft.

3. Slip the feed roll on the shaft, engaging the key.
Be sure to observe the “THIS SIDE OUT” mark­ing on the feed roll.

4. Replace flat washer, bellwasher and thumb­screw, tightening screw sufficiently to eliminate
all end play from the feed roll.

B. INSTALLING INLET AND OUTLET WIRE

GUIDES

1. Inlet guide 29N13 and insert 05N58 are supplied
with the accessory support assembly 49V51
(see Figure 4). They are held in place by rotating
the locking handle on the accessory support.
Note that insert 05N58 should be removed if 7/
64-in. or 1/8-in. cored wire is to be used.

2. An outlet guide is supplied as part of the wire
feed accessories kits for the torch used. The
guide is first attached to the wire feed conduit,
then locked in place in the clamp at the outlet
side of the accessory support assembly.

C. ADJUSTING THE ACCESSORY SUPPORT AS-

SEMBLY

When a new wire size or type is to be used, set the
pressure roll adjusting as follows:

1. Round off the free end of the welding wire with a
file to remove sharp edges and burrs which
might damage the conduit liner.

2. Release the clapper and unscrew the pressure
adjusting knob until the pressure spring is free.

3. Thread the wire through the inlet and outlet
guides of the accessory support, and 3 or 4
inches into the torch conduit.

4. Engage the clapper making sure the wire is held
in the feel roll groove.

5. Tighten the pressure adjusting knob until the
wire is firmly against the feed roll -- do not
overtighten. The spring pressure applied should
be the minimum required to provide positive,
nonslip wire feed. Too little pressure will result in
wire slippage while excessive pressure will scar
and deform the wire. Further adjustment can be
made after the wire feed is put into operation.
Note that a light spring (182W55) is installed on
the accessory support for use with soft and small
diameter hard wire. For larger diameter hard
wire, replace this spring with a heavy spring
(182W54) supplied with the unit.

D. FEEDING WIRE AND ADJUSTMENTS

With wire engaged in the accessory support per
section IV-E, feed wire through torch conduit and
torch as follows:

1. Remove nozzle and contact tip from torch.

2. Operate remote INCH switch until “cold” wire
protrudes from torch front end. Release the
INCH switch.

3. Slide the contact tip over the end of the wire and
secure to torch. Replace the torch nozzle.

4. Reoperate the remote INCH switch and check
for wire feed slippage on the accessory support
assembly. Tighten (or loosen) the pressure ad­justing knob until the wire feeds smoothly.

5. Refer to the appropriate welding control instruc­tion booklet for remaining operating procedures.

2

Table 1. Feed Roll & Outlet Guide Selection

Notes

2

Flat pressure roll 28V52 recommended for all applications except 3/64 and 1/16 aluminum.

* “U” groove pressure roll, P/N 2075346, is recommended for better performance.

** “U” groove pressure roll, P/N 2075348, is recommended for better performance.

a

Includes replaceable sleeve P/N 995651

b

Includes replaceable sleeve P/N 995692

c

Includes replaceable sleeve P/N 995693

d

Requires outlet guide insert: .030/.035 yellow P/N 993902

3/64 red P/N 05N57
1/16 white P/N 12N75
3/32 blue P/N 05N58

3

KNOB - 60N68

OUTLET GUIDE

(See Table 1 Page 3)

CLAMP - 61N02

SHAFT - 60N65

SPRING - 182W54

RETAINER - 58N24

FORK - 49V43

INLET GUIDE

(See your Torch Instruction Book­let)

CAPSCREW - 5/16" - 18 X 1 3/4"
NUT - 5/16" - 18

SETSCREW
6-32 X 1/4”LG
61330849

CLAPPER ASSY.
60N98

ROLLPIN - 62350066

(1/4 X 1-3/4" LG)

SUPPLIED:

KEY - 29N33
THUMB SCREW - 61351087
WASHER - 64309431

PRESSURE ROLL - 28V52

FEEDROLL:

(See Table 1 Page 3.)

(2) LOCKING HANDLE ASSY. (49V44)
Includes: Bolt - 1/4 x 1 5/8”LG
Spacer - 60N79

Fig.1 - Two Roll Drive Accessory Support Assembly - P/N 49V51

F-15-632 9/2000