2500_Users_Manual- - 第165页

16 17 4 5 18 20 21 19 11 12 17 18 21 20 19 2387-1 BEAM AIR CYLINDER Preventive Maintenance Figure 5-3 Label Application Chip Blow-off Output Track Air When solenoid 3 is selected (see Figure 5-15), low pressure air is pa…

2054-2

MAIN PLATE (Underside)

BACK OF BASE

BOTTOM OF BASE

FRONT OF BASE

BLACK (HP)

GRAY (LP)

BLUE

RED

EXTERNAL INPUT

REGULATORS

GAUGES

REGULATORS

AIR CYLINDER (1 of 2)

BLOW REGULATOR

SOLENOID 8

TO BEAM

SOLENOIDS

2 AND 3

TO OUTPUT TUBE

PART BLOW IN

HIGH

LOW

Preventive

Maintenance

When

the

beam

lowers,

it

is

driven

down

by

low

pressure

air

routed

through

hole

12.

This

air

enters

the

hi/low

valve

assembly

through

hole

19

and

pushes

the

ball

bearing

up,

sealing

off

hole

21

and

creating

a

path

to

hole

20.

From

hole

20,

the

low

pressure

air

is

forced

to

hole

18,

pushing

down

on

the

fixed

piston

and

lowering

the

beam.

This

air

is

vented

through

exhaust

holes

on

the

bottom

of

the

beam

assembly.

Figure

5-2

High

and

Low

Pressure

Air

Lines

5-10

ProMaster

2500

User

Manual

16

17

4

5

18

20

21

19

11

12

17

18

21

20

19

2387-1

BEAM AIR

CYLINDER

Preventive

Maintenance

Figure

5-3

Label

Application

Chip

Blow-off

Output

Track

Air

When

solenoid

3

is

selected

(see

Figure

5-15),

low

pressure

air

is

passed

to

the

beam

assembly.

When

the

2500

prepares

to

apply

a

label

on

a

device,

the

beam

lowers

(with

low

air

pressure)

the

device

on

the

application

plate,

and

then

solenoid

3

is

turned

off

to

bleed

the

low

pressure

line.

To

prevent

the

device

from

being

skewed

during

label

application,

the

beam

rests

on

the

device

(with

its

own

weight

and

no

air

pressure)

as

it

is

moved

across

the

label.

Devices

are

released

from

the

chuck

tip

when

vacuum

is

turned

off

and

low

air

pressure

is

activated

to

ensure

a

smooth

separation.

Beam

solenoid

5

(blow

off)

is

activated,

allowing

low

pressure

air

into

the

vacuum

chamber.

The

low

pressure

air

does

not

go

through

the

vacuum

venturi

because

the

chamber

is

pressurized

to

30

to

40

PSI.

Instead,

the

air

is

forced

through

the

beam

and

chuck

shaft,

assisting

the

chip

to

separate

from

the

chuck

tip.

Low

pressure

air

is

used

on

the

output

tracks

to

help

devices

enter

the

output

tubes.

When

solenoid

2

is

selected,

low

pressure

air

is

switched

to

both

output

tracks.

An

in-line

valve,

called

the

track

air

adjustment,

is

located

on

the

main

plate

to

the

right

side

of

output

tube

holder

1.

The

air

level

can

be

adjusted

when

the

system

is

reconfigured

between

large

and

small

devices.

ProMaster

2500

User

Manual

5-11

Preventive

Maintenance

High

Air

Pressure

Beam

Programming

Module

Clamp

Assembly

High

pressure

air

is

routed

from

the

high

pressure

regulator

to

a

Y

connection

and

is

divided

into

beam

high

pressure

and

programming

module

clamp

assembly

air

pressure.

The

beam

high

pressure

air

is

routed

to

the

beam

by

a

black

air

line

that

passes

through

the

beam

and

into

a

straight-in

air

fitting

on

the

back

right

side

of

the

beam.

This

air

passes

two

milled-in

air

caps

(cavities),

which

dampen

air

spikes,

and

goes

to

solenoids

6

and

7,

mounted

to

the

left

center

of

the

beam.

Creating

the

Beam

Vacuum

The

beam

vacuum

required

to

hold

a

device

on

the

chuck

is

created

when

solenoid

7

(vacuum)

is

activated.

The

high

pressure

air

passes

through

the

beam

passes

through

the

top

hole

of

the

vacuum

venturi,

and

escapes

through

holes

in

the

bottom

of

the

beam.

As

this

rush

of

air

passes

the

venturi,

it

creates

a

vacuum

at

the

chuck

tip.

During

the

optics

test,

the

vacuum

value

should

fluctuate

between

about

26

(when

no

device

is

on

the

chuck)

and

172,

with

a

value

of

140

minimum

for

proper

vacuum.

The

vacuum

is

sensed

by

the

vacuum

sensor

(mounted

at

the

left

front

of

the

beam).

When

a

predefined

vacuum

level

is

detected

by

a

device

blocking

the

chuck

tip,

the

2500

assumes

that

the

beam

has

picked

up

a

device.

A

malfunction

of

the

vacuum

generator,

the

vacuum

sensor,

or

the

microswitch

can

cause

an

error

message

on

the

2500's

display

stating

that

the

beam

has

dropped

the

device

or

is

unable

to

pick

up

the

device.

Inserting

a

Device

into

the

Module

Low

pressure

air

lowers

the

beam

to

the

programming

module

contacts.

Additional

force

is

required

to

insert

the

device

into

the

programming

module.

Insertion

begins

when

the

high

pressure

air

present

at

hole

4

is

switched

to

hole

5

by

beam

solenoid

6

(high

pressure).

This

high

pressure

passes

to

hole

21,

pushing

the

ball

bearing

down

and

sealing

off

the

low

pressure

of

hole

19.

This

allows

high

pressure

to

pass

to

hole

20

and

enter

the

bottom

of

the

cylinder

at

hole

18.

Air

pushing

against

the

fixed

piston

pushes

the

beam

down

to

establish

the

required

continuity

between

the

devices

leads

and

the

module's

contacts.

Programming

module

clamp

assembly

air

is

switched

by

solenoid

8

to

either

open

the

clamps

(to

remove

a

module)

or

close

the

clamps

(to

hold

a

module

in

place).

Red

air

lines

carry

air

to

close

the

clamps;

blue

air

lines

carry

air

to

open

the

clamps.

In-line

valves

on

these

lines

control

the

amount

of

air

entering

the

air

cylinders

and

allow

ac^ustment

so

each

side

of

the

clamp

opens

and

closes

at

the

same

rate.

The

in-line

valves

for

the

red

lines

are

in

the

middle

of

the

air

lines,

while

the

valves

for

the

blue

lines

are

at

the

base

of

each

air

cylinder.

5-12

ProMaster

2500

User

Manual