MZ-800
3-2. Pen exchange
method
To remove pen, press the pen exchange button, when the
slider
is
at the right handside, push the pen release lever.
Motor
Push
the
pen
release lever
To
install the pen, push the tip
of
the pen through the
ring
of
the return spring in the fIrst place, then push into
the holder.
Upon completion, ensure that the tip
of
the
pen
is
engaged with the hole
of
the pen return spring.
If
colour change
is
done when the pen
is
disengaged from
the hole, it may cause improper rotation
of
the rotary
holder
as
the slider makes contact with the pen. Do not
try to rotate the rotary holder by hand when installing
the pen during replacement
of
the pens.
3-3. Stepping
motor
driving
Signal
• The
X-axis
stepping motor and the Y-axis stepping
motor are driven by the two-phase magnet.
Stepping motor driving signal
Basic drive pulse
Phase A
Phase B
Phase
C
Phase 0
n n n I I " :
~,
~WW~
~il";
I
' I ' ,
i ! i :
, I '
I
---[[Jr-!
-+--+--+-+-
I ,
Motor
clock
Hold
period
f-----i
i--tMH
--1
39
It
is
more effective to
save
power to shut off current
while the X and
Y axis motors
are
at a halt. But, there
may be a possible malfuction because
of
unsuppressed
vibration, if the current
is
turned off with a normal
pulse width. In order to
prevent this, current
is
applied
excessively for more than the
given
hold time (tMH =
lms or more).
3-4.
Colour
position
detector
The colour pOsition detector consists
of
a reed switch
and a permanent magnet and it may cause malfunction
owing to external vibration, and magnetic influence.
Especially, when deposit
of
alien matter or paper
frag-
ments
is
between the left end
of
the carriage and the
frame this may result in a failure
of
the colour detect
performance.
3-5. Character
set
Input
of
an undefmed code up to $20
is
ignored. Other
undefmed codes are represented in hexadecimal notation
using the pen in a next color position.
Pin configuration (top view)
TO
Vcc
XTAL1
T1
XTAL2
P27
RESET
P26
SS
P25
INT
P24
EA
P17
RD
P16
PSEN
P15
WR
P14
ALE
P13
DBo
P12
DB,
P11
DB,
P10
DB3
Voo
DB.
PROG
DBs
P23
DB,
P22
DB,
P21
Vss
P20
Pin Configuration
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