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Computer System - OVERVIEW

Reference: Giesecke et al. Chapter 2

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Parts of a Computer System

CPU Input Output Storage Devices Operating System Software

(latest processor)

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

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CPU – TimelineCPU – 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

Input Devices

Keyboard Mouse Digitizer Trackball Light Pen Touch Screen Voice

Keyboard

ESC – Escape key

CTRL – Control Key

ALT – Alt key CTRL – Control Key

Function Keys

Backspace – deletes anything to the left of the cursor

Forward Slash

Back Slash

Delete – deletes anything to the right of the cursor

Nums Lock – types numbers when using keypad

Nums Lock, Caps Lock, & Scroll Lock – green light means lock is on

Caps Lock –all letters will be typed as capital letters

Mouse

Right Button – sometimes works like the Enter key and sometimes displays a short cut menu

Middle Button –can be rolled or clicked, depending on the software

Left Button – select entity, menu selection, icon, etc.

Mouse Pad

Output Devices

Monitors Printers Plotters Machining Centers Rapid Prototyping Other Software

Packages, such as ANSYS and Mold Flow!

Output Devices cont’d. Printer

A size paper drawer (8-1/2” x 11”)

On/Off switch on side

B size paper drawer (11” x 17”)

Control Buttons and Prompt Window. To Cancel a job – press the Cancel button.If Offline – press the green button

10Source: http://www.moriseiki.com

Haas: VF-11/50 Vertical Machining Center (30 hp spindle w/ 120” x 40” x 20” travel)

Haas: Mini Mill(7.5 hp spindle w/ 16” x 12” x 10” travel)

Source: http://www.haascnc.com

Mori Seiki: SL-154 Turning Center

Mori Seiki: SL-603 Turning Center

CAD Model

Import into CAM package

Post Process

Download g-code into machine tool

Output Devices cont’d. Manufacturing

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Output Devices cont’d.

Rapid Prototyping w/ 3D Printer

Source: Z-Corp http://www.zcorp.com/

CAD Model

Import into 3D printer as STF file

Produce physical prototype (starch/plaster)

Full Scale Engine Block printed on the Z810 System (18"x19"x13")

Z-Corp, model Z810 System, Build Volume = 20” x 24” x 16”

Forsman’s METBD 410

Storage Devices

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 cont’d.

Floppy Drive

CD ROM Drive

Memory Stick in USB port

Access Storage Devices Start – Search – For Files or Folders… – Folders button

+ Means Collapsed

- Means Expanded

CD ROM Drive

Hard drive

Floppy 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.