Ransburg REA User manual

TECHNICAL MANUAL

IL-246-BIL-246-B

IL-246-B

(Replaces IL-246-A)

January - 2008

IMPORIMPOR

IMPORTT

TANTANT

ANTANT

ANT: Before using this equipment,: Before using this equipment,

: Before using this equipment,: Before using this equipment,

: Before using this equipment,

carefully read SAFETY PRECAUTIONS,carefully read SAFETY PRECAUTIONS,

carefully read SAFETY PRECAUTIONS,

starting on page 1, and all instructions instarting on page 1, and all instructions in

starting on page 1, and all instructions in

this manual. Keep this Tthis manual. Keep this T

this manual. Keep this Technical Manualechnical Manual

echnical Manualechnical Manual

echnical Manual

for future reference.for future reference.

for future reference.

ITW RANSBURGITW RANSBURG

ITW RANSBURG

REA™ AND VECTREA™ AND VECT

REA™ AND VECTOR™OR™

OR™OR™

OR™

APPLICAAPPLICA

APPLICATT

TORSORS

ORSORS

ORS

ELECTROSTELECTROST

ELECTROSTAA

ATICTIC

TICTIC

TIC

SPRASPRA

SPRAYY

TECHNIQUESTECHNIQUES

TECHNIQUES

Technical Manual Price:echnical Manual Price:

echnical Manual Price:echnical Manual Price:

echnical Manual Price: €15.00 Euro)15.00 Euro)

15.00 Euro)15.00 Euro)

15.00 Euro)

$20.00 (U.S.)$20.00 (U.S.)

$20.00 (U.S.)

IL-246-B

NOTE:NOTE:

NOTE: This manual has been changed from IL-246-AIL-246-A

IL-246-AIL-246-A

IL-246-A to revision IL-246-B.IL-246-B.

IL-246-B.IL-246-B.

IL-246-B. Reasons for this

change are noted under “Manual Change Summary” inside the back cover of this manual.

IL-246-B

REA AND VECTOR APPLICATOR SPRAY TECHNIQUES:REA AND VECTOR APPLICATOR SPRAY TECHNIQUES:

REA AND VECTOR APPLICATOR SPRAY TECHNIQUES:

USE THE RIGHT TECHNIQUE.................................................................................................

FAN CONTROL..........................................................................................................................

PATTERN....................................................................................................................................

FLAT SURFACES.......................................................................................................................

HORIZONTAL PASSES.............................................................................................................

VERTICAL PASSES...................................................................................................................

APPLICATOR TO TARGET DISTANCE...................................................................................

OVERLAP....................................................................................................................................

TRIGGERING.............................................................................................................................

LARGE OBJECTS......................................................................................................................

TUBULAR WORK.......................................................................................................................

RECESSED AREAS...................................................................................................................

SUMMARY..................................................................................................................................

SAFETY REQUIREMENTS........................................................................................................

PAGEPAGE

PAGE

CONTENTSCONTENTS

CONTENTS

1-111-11

1-11

9-10

REA/Vector Applicators Spray Techniques

IL-246-B

REA/Vector Applicators Spray Techniques

Before operating, maintaining, or servicing any ITW Ransburg electrostatic coating system, read and

understand all of the technical and safety literature provided with ITW Ransburg products. If you do not

have the manuals and safety literature for your ITW Ransburg system, contact your ITW Ransburg

representative.

USE THE RIGHT TECHNIQUESUSE THE RIGHT TECHNIQUES

USE THE RIGHT TECHNIQUES

REA/VREA/V

REA/Vector (Electrostatic) Applicatorsector (Electrostatic) Applicators

ector (Electrostatic) Applicatorsector (Electrostatic) Applicators

ector (Electrostatic) Applicators

Savings of 25% to 50% in paint is possible when you replace conventional air spray with ITW Ransburg

Electrostatic Applicators. You finish curved and recessed surfaces uniformly in fewer passes, because

combined air and electrostatic forces literally follow the shape of the work surface. Bounce losses from

work are reduced by the electrostatic attraction, when proper techniques are used.

The following describes basic electrostatic spray techniques. Depending on the type of work being

sprayed, it may be necessary to change the technique slightly.

IL-246-B

REA/Vector Applicators Spray Techniques

FAN CONTROLAN CONTROL

AN CONTROLAN CONTROL

AN CONTROL

The size of the object being coated is the determining factor in adjusting the fan pattern; the larger the

object, the larger the required fan pattern. Fan control of the ITW Ransburg REA/Vector applicators is

accomplished by rotating the adjusting knob located at the rear of the applicator. Fan width can be set

for approximately a 3-inch width (minimum) to approximately a 14-inch (maximum). Fan widths and

overall pattern appearances are illustrated.

Minimum

Maximum

PAA

ATTERNTTERN

TTERNTTERN

TTERN

POOR PATTERNPOOR PATTERN

POOR PATTERN

Dirty, worn, or

damaged nozzle.

Clean or replace.

SPLIT PATTERNSPLIT PATTERN

SPLIT PATTERN

Fan too wide - narrow

adjustment slightly.

GOODGOOD

GOOD

PATTERNPATTERN

PATTERN

ABB

BCC

> The degree of atomization is dependent

on the viscosity of the paint formulation, the

applied air pressure, and nozzle selection.

NOTENOTE

NOTE

IL-246-B

REA/Vector Applicators Spray Techniques

HORIZONTHORIZONT

HORIZONTALAL

ALAL

AL PASSESPASSES

PASSESPASSES

PASSES

The spray applicator should be maintained in a

position at right angles to the object and should be

moved in a path parallel to the object.

VERTICAL PASSESVERTICAL PASSES

VERTICAL PASSES

There may be instances where it is more practical

to coat an object using vertical passes rather than

horizontal. First, rotate the nozzle to shift the fan

pattern, then holding the applicator at right angles

to the object, move the applicator in a straight

vertical path as illustrated.

FLAFLA

FLATT

TSURFSURF

SURFSURF

SURFACESACES

ACESACES

ACES

One of the most prevalent of "bad" spray painting

habits is the one where the operator holds his arm

steady and swings his wrist back and forth. This

is a hard habit to break, it gives the illusion of

adding speed to the coating operation, when in

reality, it is slower and much more inefficient.

Spray painting in this fashion results in light films

on both sides, excessive film at center, and

increased overspray with excessive "bounce-

back."

IL-246-B

REA/Vector Applicators Spray Techniques

>The object being coated is maintained at

groundpotential,thesprayapplicator operator

is also grounded, therefore, the operator has

as much attraction for the electrostatic paint

as the object. To prevent "wrapback" always

keep the applicator closer to the target than it

is to you.

C A U T I O NC A U T I O N

C A U T I O N

APPLICAAPPLICA

APPLICATT

TOR TOR T

OR TOR T

OR TOO

TARGETARGET

ARGETARGET

ARGET DISTDIST

DISTDIST

DISTANCEANCE

ANCEANCE

ANCE

The distance between the applicator and the target

influences the appearance of the final finish coating

of the object. If the applicator is held too close

(under 4-inches), runs and sags with the

excessive bounce-back can occur. If the

applicator is held too far from the object, the

electrostatic attraction is decreased. Normally,

the best spacingbest spacing

best spacingbest spacing

best spacing between applicator and target

is in the 4 to 12-inch area.4 to 12-inch area.

4 to 12-inch area.4 to 12-inch area.

4 to 12-inch area. However, this

distance can vary with extremely high delivery

systems. Maximum target distance should not

exceed 12-inches.

Too FarToo Far

Too Far

4" to 6"4" to 6"

4" to 6"

Under 2"Under 2"

Under 2"

IL-246-B

REA/Vector Applicators Spray Techniques

> If front and back are both sprayed, there

may be enough wrap using Technique B or

C to coat a small edge or flange. If wide

flanges are to be coated, this may require

individual coating of edges before the flat

surfaces are sprayed.

NOTENOTE

NOTE

OVERLAPOVERLAP

OVERLAP

For best hiding and uniformity of film thickness, stroke overlap should be approximately 50%. There

should be some overlap at the top and bottom of the part to increase edge coverage. Overlap

requirements can vary widely with different paint formulations and different compositions of objects

being coated. Individual spray coating operational experience should provide the guidelines for

efficiency in this instance.

TRIGGERINGTRIGGERING

TRIGGERING

Applicator triggering (ON/OFF) depends largely on the desired results; the amount of wraparound

required, edge coating, etc. If front and back of the object are being coated, proper applicator technique

can effect edge coating (in some instances) without making a specific pass for this purpose. Examples

of different trigger times and the results that can be expected are illustrated.

A. Little or no wrap - incomplete coverage

B. Fair - some wrap

C. Good wrap (Triggered 2" to 3" past edge)

D. Too much overstroke may produce heavy

edges and produce more overspray.

DCC

CBB

BAA

(Trigger Off)

TOP VIEW

IL-246-B

REA/Vector Applicators Spray Techniques

LARGE OBJECTSLARGE OBJECTS

LARGE OBJECTS

BlendingBlending

Blending

If the size of the object is greater than the spray

applicator operator can reach, it should be coated

in segments, the size of each segment being the

length the spray applicator operator can

comfortably span. Each segment should be

blended with the adjacent segment using

"feathering" or "over-lapping" strokes. A slight

angle of the applicator improves the results of the

"blending" pass.

TOP VIEW TOP VIEW

>Too much overlap can result in runs and

sags or excessive film, where segments

blend together.

C A U T I O NC A U T I O N

C A U T I O N

IL-246-B

REA/Vector Applicators Spray Techniques

> Avoid applicator to targe distances of

over 12-inches, excessive applicator to tar-

get distances will result in wrapback.

NOTENOTE

NOTE

TUBULAR WORKTUBULAR WORK

TUBULAR WORK

Tubular parts or objects up to approximately 2-1/2" diameter can be coated successfully from one side,

utilizing wraparound characteristics and proper techniques.

A. Wrong fan position - little wrap. Heavy film on front surface,

possible sags.

B. Correct fan position - better wrap. More accurately con-

trolled film. Normally fan pattern should be slightly wider

than parts being sprayed.

C. Correct fan position but excessively wide fan may produce

more overspray if used in this position.

D. A wide fan tilted at an angle may also work well. (Wide fans

have slower forward velocity.)

SUGGESTION:SUGGESTION:

SUGGESTION: Small tubes may be racked in groups to simulate larger targets. This allows the use

of wider fans and may help improve efficiency.

↑↑

↑

↓↓

↓

FAN POSITION

(Example 1"

Diameter Part)

MOTION

Adjust the fan for a pattern

width slightly wider than the

object. This allows some

coating material to start

around the sides of the

object.

Increase the applicator to target

distance to approximately 10-

12-inches. This will decrease

the speed of the paint particles

in the vicinity of the target.

Hold the applicator at an angle

of 30o to 45oto the object. This

will direct paint more to target

area.

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