Charmilles E110-D10 - 12.14 ANGULAR SETTING OF THE MAGNETIC CHUCK

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61

-

12.14

ANGULAR

SETTING

OF

THE.

MAGNETIC

CHUCK

(fig.

20)

When

making

this

adjustment,

the

piston

must

not

be

in

contact

with

either

the

upper

or

the

lower

end-stop.

The

reference

plane,

as

determined

by

the

flat

surface

of

the

keeper

block

on

the

chuck,

must

be

parallel

to

the

longitudinal

travel

of

the

table.

To

check

and,

if

necessary,

to

correct

the

angular

setting

of

the

magnetic

chuck,

proceed

as

indicated

below

:

Fasten,

by

magnetic

attraction,

a

rectilinear

rectangu-

lar

rule

of

approximately

6"

(150

mm)

length,

to

the

magnetic

chuck~

make

sure

that

the

rule

and

the

keeper

block

are

in

perfect

contact.

Fasten

an

indicator

on

the

table

in

such

manner

that

its

tip

touches

the

free

edge

of

the

rule.

Set

the

indicator

dial

to

·zero.

Move

the

X

and

Y

table

longitudinally

while

watching

the

hand

of

the

indicator.

If

the

hand

remains

still

opposite

the

zero

on

the

scale

of

the

indicator,

the

angle

set

of

the

electrode

holder

is

correct.

If

the

hand

deviates

from

the

zero

mark,

the

angular

setting

of

the

magnetic

chuck

calls

for

readjustment

which

should

be

carried

out

as

follows

:

Rough

adjustment

:

Loosen

the

screws

that

fasten

the

magnetic

chuck

and,

within

the

limits

of

play

afforded

by

the

screws,

make

the

best

possible

compensation

for

the

error.

Fine

adjustment

:

Carry

out

this

adjustment

by

means

of

the

two

screws

(126).

After

adjustment,

firmly

tighten

the

screws.

Check

for

parallelism

and,

if

necessary,

repeat

the

above

operations

until

the

hand

of

the

indicator

remains

still

at

zero

for

the

full

travel

of

the

table.

12.15

ALIGNMENTS

The

objective

of

these

alignment

adjustments

is

to

assure

not

only

the

accuracy

of

machining

with

the

electrodes,

but

also

the

checking

operations

carried

with

the

accessories.

It

is

again

brought

to

your

attention

that

all

the

adjustments

described

later

are

to

be

made

without

the

piston

being

in

contact

with

either

the

upper

or

the

lower

end-stop.

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