3.
OPERATION
3-1. Block diagram
H
\
\
Intelligent
H
j
,
Con-
nector
Buffer
interfacing
I---
J
r--
LSI
1\
,...
Control switches
{paper
feed
Reset
Pen exchange
3-1-1.
At
power on
At
power
on, more than
5V
of
pen up current
is
applied
for
a period
of
lOrns,
plus 5 and minus
Orns,
to
move the
carriage
556
steps backward on the X-axis in order to
initialize the colour position.
As
the carriage
is
held at the
left
margin
after disengagement
of
the motor, it
is
then
moved
30 steps forward on the X-axis, then stepped back
30 steps
again
to check
if
the colour position detector
has
been
made.
If
not, it continues to move the carriage
30
steps forward on the X-axis, then return 30 steps to
ensure
the made condition.
3-1-2.
Colour
change_
operation
To
change
colour, the slider makes three reciprocating
movements
of
6mm
(30
steps) at the left end
of
the X-axis
to
move
the pen position one step. When the desired pen
position
is
attained, it then returns to the home position.
Since
the pen rotor makes a unidirectional rotation at
the
left end of the
X-axis,
and
is
locked within printable
range,
care
must
be
exerted not to touch the rotor and
the
slider.
38
MZ-800
,---
-
\
I--
~
V-axis
,
I--
stepping
motor
J
Drive array
I
~
.
I--
X-axis
stepping
I--
motor
,
~
Pen
up!
~
........
Magnet
down
,
drive circu it
,.
magnet
,
L_
I
_J
Printer mechan
ism
3-1-3. Pen exchange operation
A pen needs to be exchanged with a fresh one when it
runs
out
of
ink. In such an event, the pen
is
moved 485
steps forward on the X-axis from the home position with
the used pen located on the top
of
the rotor, then take
out the used pen, by pressing the pen release lever and
exchange it with a fresh one.
3-1-4. Motor phase and rotating direction
The arrow head indicates the forward direction for both the
X-axis and Y-axis.
~
c
BC
AD
BD
To Next Page
Loading...
Need help?
General
