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4. CONTROL SYSTEM BY MICRO-COMPUTER
The micro-computer being used in Compal Galaxie is 8-bit computer fabricated on a single chip using N-MOS (N
channel silicon gate MOS process) in 40 pins dual-in-line package with built in 4 K byte mask ROM. 96 byte RAM.
oscillator. timer and 1/0 port. Moreover 1 28K bit mask ROM and 1 6 K bit RAM are expanded on external CPU. All
function of this machine are fully controlled by this micro-computer.
tPotenhOi'l'letet)
<CONTROL SYSTEM CHART>
CPU
(Other switches)
(Other sensors)
Star!/ stop sw•tch.
S•de·cutter
R e v erse S WitCh.
detecr.ng swuch.
Needle pos•tton
Bobbin
Winder switch
SWitCh.
Presser loot pos•t•on
Panern select•on
detecung sw•tch.
button.
Feed dog pOSit•on
Manual st•tch length
c
detecting S Witch.
control sw•tch.
Buttonhole le v er
Manual s tit
h w1dth
pos•flon detecttng
control sw•tch,
SWitCh.
Ten �eys.
Buttonhole S Witch.
Program star! key.
�ev
Pattern d•splay
Program end key.
change sw•tch
Joint
Foot conrroller
tack SWitCh
(4K
(96 byte)
ROM
byte)
RAM
(Dtsplay de v •cel
Pattern dtsplay
Manual d•splay
LED.
4
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