Canon BJ-10E Service Manual - Page 88

Part

3:

TECHNICAL

REFERENCE

4.4

CARRIAGE

SECTION

4.4.1

CARRIAGE

SECTION

FUNCTIONS

a)

BJ

cartridge

mounting

function

The

carriage

fixes

the

BJ

cartridge

mechanically

and

connects

the

electrical

circuits

to

the

logic

card.

b)

Carriage

drive

function

The

carriage

is

moved

horizontally

over

the

print

paper

by

the

carriage

motor.

c)

Head

gap

adjustment

function

The

gap

between

the

head

and

print

paper

can

be

adjusted

with

the

head

gap

dial

to

suit

the

paper

thickness.

d)

Purge

unit

drive

function

The

carnage

motor

returns

the

carriage

to

its

home

position

and

drives

the

purge

unit.

4.4.2

CARRIAGE

SECTION

STRUCTURE

a)

BJ

cartridge

mounting

section

The

hook

that

is

moved

with

the

hooking

lever

fixes

the

BJ

cartridge

on

the

carriage.

When

the

BJ

cartridge

is

fixed

on

the

carriage,

the

contact

portion

of

the

ribbon

cable

connects

with

the

contact

portion

of

the

bubble

jet

head

unit

to

transfer

printing

signals

from

the

logic

card.

b)

Carriage

drive

section

The

DC

stepping

carriage

motor

rotates

the

lead

screw

via

the

drive

belt.

The

carriage

moves

horizontally

over

the

print

paper

driven

by

lead

pin,

which

engages

in

the

groove

of

the

lead

screw.

For

the

carriage

position,

the

photocoupler

home

position

sensor

under

the

carriage

detects

the

photointerrupter

(part

of

the

guide

shaft

holder)

at

the

left

of

the

carriage

guide

shaft,

and

logical

seeking

takes

place

using

a

stepping

pulse

transmitted

to

the

carriage

motor.

c)

Head

gap

adjustment

function

The

eccentric

carriage

guide

shaft

can

be

adjusted

with

the

head

gap

dial

on

the

bottom

of

the

printer

to

match

the

head

gap

to

the

print

paper

thickness.

The

head

gap

is

about

0.04

inch

(1

mm)

when

the

dial

is

turned

fully

in

the

direction

of

the

cut

sheet

mark.

and

about

0.075

inch

(1.9

mm)

when

turned

fully

in

the

direction

of

the

envelope

mark.

When

the

optional

auto

sheet

feeder

is

used,

set

the

dial

to

the

middle

point

between

the

cut

sheet

mark

and

envelope

mark

where

the

dial

clicks.

d)

Purge

unit

drive

section

When

the

lead

pin

enters

the

left

margin

groove,

the

carriage

pushes

the

clutch

gear

of

the

lead

screw

to

the

purge

unit,

and

transmits

the

carriage

motor

power

to

the

purge

unit

control

gear.

3-20

Canon BJ-10E Service Manual - Page 88

Technical, Reference, Carriage, Functions, Structure

Page 88 highlights