ESAB Four Roll Drive "Uniform Pressure" Accessory Support Assembly Troubleshooting instruction

Brand: ESAB

Model: Four Roll Drive "Uniform Pressure" Accessory Support Assembly

Type: Troubleshooting instruction

F-12-821-D

February, 2001

FOUR ROLL DRIVE

UNIFORM PRESSURE

ACCESSORY SUPPORT

ASSEMBLY

Four Roll Drive Accessory Support

Assembly ........................ P/N 600216

INSTRUCTIONS for

FEATURE/BENEFITS

■ Not just another Four Roll Drive but, an exclusive

uni-pressure design that provides the uniform

equal feed roll pressure required to assure posi-

tive non-slip wire feeding.

■ By uniformly distributing the feed pressure be-

tween all four feed rolls, the uni-pressure design

reduces the amount of feed roll pressure required

to feed any soft, hard or flux-core wire consistently.

■ Because the uni-pressure design assures uniform

equal adjustment of feed roll pressure, wire diam-

eter deformation, surface galling, copper flaking

and wire pumping problems can be minimized, and

productively maintained under the most demand-

ing conditions.

■ For reducing wire change and pressure resetting

time - a quick release clapper with single adjust-

ment knob allows releasing and resetting the feed

rolls without disturbing the feed roll pressure set-

ting.

■ The uni-pressure accessory support can quickly

and easily be mounted on any EH-10A or EH-10AD

motor-gear units for feeding .030 through 1/8-in.

diameter wire.

■ Available with U groove, Vee hard or serrated V

feed rolls and utilizing standard inlet and outlet

guide accessories, this four roll drive is truly univer-

sal in application.

■ Ordering is simplified by the availability of feed roll

kits (see page 2) or mix-and-match a feed roll

combination for your own specific need.

F-12-821-D

Be sure this information reaches the operator.

You can get extra copies through your supplier.

These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of

operation and safe practices for electric welding and cutting 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 maintain 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.

I. INTRODUCTION

The Four Roll Drive Accessory Support Assembly (600216)

illustrated in Fig. 1 utilizes four feed rolls to provide force

necessary for positive nonslip wire feed. The four roll drive

assembly is designed to be used with EH-10 Motor-Gear

Units for feeding .030 through 1/8-in. diameter wire.

The four roll drive unit features a quick release clapper

assembly which allows releasing and resetting the feed

rolls without disturbing the pressure spring setting. Two

tension springs are available for the assembly. A silver

spring (182W55) is installed in the assembly at the factory

and a stiffer blue spring (182W54) is available as an

option. The stiffer spring is used with larger diameter hard

and cored wires, while the light spring is used with soft and

smaller diameter hard wires. The four roll drive assembly

also includes quick release turn-locking handles for mount-

ing the torch and wire conduits. The four roll drive assem-

bly does not include feed rolls or a center wire guide. Refer

to Table 1 for the appropriate feed roll kit.

II. INSTALLATION

A. FOUR ROLL DRIVE ASSEMBLY

To install the four roll drive assembly on an EH-10 Motor-

Gear Unit proceed as follows:

1. Remove the thumbscrew and washer from the output

shaft of the motor-gear unit.

2. Fit the Gear and Insulator Assembly (P/N 999179) onto

the motor-gear unit shaft and engage the Key (P/N

28N33).

3. Insert the 1/4-in.-20 x 1/2-in. panhead screw (P/N

61307087), 1/4-in. bell washer (P/N 950783), and 1/4-

in. flatwasher (P/N 64309431) in the motor-gear unit

shaft to secure the gear and insulator assembly.

4. Position the four roll drive assembly on the motor-gear

unit insulator ring (P/N 60N90) and secure by tightening

the 5/16-18 capscrew at the bottom of the assembly. Be

sure the gear and insulator assembly meshes cor-

rectly with the lower feed roll gears in the four roll

drive assembly.

B. FEED ROLLS

To install the desired feed roll kit (see Table l) proceed as

follows:

1. Position the feed rolls over the four gear assembly hubs

aligning the feed roll holes with the gear assembly

holes.

2. Secure the feed rolls to the gear assemblies using the

No. 8-32 x 5/8-in. screws and lockwashers supplied.

C. CENTER WIRE GUIDE

To install the proper center wire guide (see Table l)

proceed as follows:

1. Remove the two No. 8-32 x 5/8-in. panhead screws

which attach the Center Guide Clamping Plate (P/N

2075495) to the Center Guide Block (P/N 2075496).

Remove the plate.

2. Insert the center wire guide in the groove of the guide

block.

3. Replace the clamping plate, using the screws removed

in step 1 above.

III. OPERATION

A. THREADING WIRE TO TORCH CONDUIT

1. Round off the free end of the welding wire with a file.

2. Raise the clapper assembly to relieve pressure on the

feed rolls.

3. Thread wire as follows: (a) through the inlet guide; (b)

over the groove in the lower left hand feed roll; (c)

through the center wire guide; (d) over the groove in the

lower right hand feed roll and; (e) into the outlet guide.

4. Lower the clapper assembly.

5. Thread wire through the torch conduit using the torch

switch or inch switch.

IMPORTANT: When replacing a two-roll drive with a four-

roll drive it will be necessary to reverse the

motor-gear unit rotation to ensure correct

direction of wire feed. Switch the motor

armature leads at the control so that rota-

tion (as viewed from shaft end of motor-

gear unit) will be in a counterclockwise

direction.

B. ADJUSTING THE PRESSURE SPRING SETTING

When a new wire size or type is to be used, set the

pressure spring adjustment as follows:

1. Release the Clapper Assembly (P/N 2075500) and

unscrew the Pressure Adjusting Knob (P/N 60N68)

until the pressure spring is free.

2. Thread the wire through the four roll drive assembly as

described in Section III-A above.

3. Engage the clapper making sure the wire is held in the

feed roll grooves.

4. Energize the motor-gear unit while slowly tightening the

pressure adjusting knob until the wire begins to feed

without slipping. 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.

Notes

4-roll kit includes center wire guide and 2 upper and 2 lower feed rolls and mounting hardware for them.

* Outlet Guides must be ordered separately from Feed Roll Kit.

Table 1. Feed Roll & Outlet Guide Selection

F-12-821-D 2/2001 Printed in U.S.A.

FORK - 49V43

ROLLPIN - 62350066

(3/16 X 1-3/4")

(2) LOCKING HANDLE

(49V44)

(4) FLATWASHER - 2075524

SCREW - 1/4 X 20 X 1/2"

(61307087)

BELL WASHER - 1/4"

(950783

FLATWASHER - 1/4"

(64309431)

GEAR & INSULATOR ASSY. - 999179

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

(61340166)

NUT - 5/16" - 18 (63350121)

CLAMPING PLATE - 2075495

CLAPPER ASSY. - 2075500

ROLLPIN - 2075523

KNOB - 60N68

SPRING - 182W55

RETAINER - 58N24

(4) FEED ROLL

( Optional Selections)

Feed Roll Mounting Hardware:

(17) SCREW - No. 8-32 x 5/8"

(61307881)

(17) LOCKWASHER - No. 8

(63402887)

Fig.6 - Four Roll Drive Uniform Pressure Accessory Support Assembly - P/N 600216

(4) GEAR ASSY.

(2075492)

INLET GUIDE (29N13)

INSERT (05N58)

(Included with Assembly)

OUTLET GUIDE

(See Table 1, Page 3)

PIVOT BLOCK - 2975494

ESAB Four Roll Drive "Uniform Pressure" Accessory Support Assembly Troubleshooting instruction

ESAB Four Roll Drive "Uniform Pressure" Accessory Support Assembly Troubleshooting instruction

ESAB Four Roll Drive "Uniform Pressure" Accessory Support Assembly Troubleshooting instruction

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