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Computer System - OVERVIEW
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Reference: Giesecke et al. Chapter 2
1
Parts of a Computer System
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(latest processor)
CPU
Input
Output
Storage Devices
Operating System
Software
CPU
Central Processing Unit
receives data and manages
and controls the functions
of the CAD system.
It is analogous to a
human’s brain, which
interprets data and controls
motor functions.
2000: Pentium® 4 Processor
CPU – Timeline

’48 –Transistor (Bell Labs)

70’s – CPU (Intel) Birth of PC

70’s – Present –Dramatic increase
in processor speed (Moore’s Law):
Ted Hoff Inventor
4
Input Devices
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Keyboard
Mouse
Digitizer
Trackball
Light Pen
Touch Screen
Voice
Keyboard
Backspace –
deletes anything to
the left of the cursor
ESC –
Escape key
Function
Keys
Back
Slash
Delete – deletes
anything to the
right of the cursor
Nums Lock, Caps
Lock, & Scroll
Lock – green light
means lock is on
Caps
Lock –all
letters
will be
typed as
capital
letters
CTRL –
Control Key
ALT – Alt key
Forward
Slash
CTRL –
Control Key
Nums Lock –
types numbers
when using
keypad
Mouse
Middle Button –
can be rolled or
clicked, depending
on the software
Left Button –
select entity, menu
selection, icon, etc.
Mouse Pad
Right Button –
sometimes works
like the Enter key
and sometimes
displays a short
cut menu
Output Devices
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Monitors
Printers
Plotters
Machining Centers
Rapid Prototyping
Other Software
Packages, such as
ANSYS and Mold Flow!
Output Devices
cont’d.
Printer
Control Buttons and Prompt Window.
To Cancel a job – press the Cancel button.
If Offline – press the green button
B size paper drawer
(11” x 17”)
A size paper drawer
(8-1/2” x 11”)
On/Off switch
on side
Output Devices
Manufacturing
cont’d.
CAD Model
Import into
CAM package
Haas: Mini Mill
(7.5 hp spindle w/ 16” x 12”
x 10” travel)
Haas: VF-11/50 Vertical Machining
Center (30 hp spindle w/ 120” x 40”
x 20” travel)
Source: http://www.haascnc.com
Post Process
Download gcode into
machine tool
Mori Seiki: SL-154 Turning
Center
Mori Seiki: SL-603 Turning
Center
Source: http://www.moriseiki.com
10
Output Devices
Rapid Prototyping w/ 3D Printer
cont’d.
CAD Model
Import into 3D
printer as STF file
Z-Corp, model Z810
System, Build Volume =
20” x 24” x 16”
Full Scale Engine Block printed
on the Z810 System (18"x19"x13")
Produce physical
prototype
(starch/plaster)
Forsman’s METBD 410
Source: Z-Corp http://www.zcorp.com/
11
Storage Devices
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Fixed disk drive or hard
drive (up to 120 GB+)
Floppy disk drive (1.44
MB)
USB (64 MB – 512 MB)
CD-ROM drives (800 MB)
Server (P: drive)
Optical drives (1 GB)
Magnetic tape (1+ GB)
Zip drives (100 MB)
Super Disk (120 MB)
Storage Devices
CD ROM
Drive
Floppy
Drive
cont’d.
Memory Stick
in USB port
Access Storage Devices
Start – Search – For Files or Folders… – Folders button
+ Means
Collapsed
- Means
Expanded
Hard drive
Floppy Drive
CD ROM Drive
P: drive –
your personal
space
V: drive –
courseware
Data Disk
Operating System
An operating system is a set of instructions that
control the operation of the computer and its
peripheral devices.
Operating systems control the execution of
specific program.
Operating systems provide support for activities
like input and output (I/O)
Examples: Windows XP, 2000 or NT, UNIX, OS2,
Linex
Stand Alone vs Networked
Stand Alone
Networked
Stand Alone

A self sufficient
computer
– All software must
be loaded onto
hard drive or run
off a floppy.
– Printer, scanner,
etc., connected
directly to
computer.
Networked

Behrend Computer Labs
– Multiple computers connected to one central
location by cables, routers, etc.
» One copy of the software on the server.

Site license controls number of copies that may be
downloaded at one time.

Initial software downloads times may take up to 40
minutes – depending on the software
» May connect to a printer in any computer center
lab
» Store data (your files) on computer center server,
i.e., your P: drive. Freshman allocated 10 MB.