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Easy
CNC A Beginner's Guide to CNC by David Benson
Square
1 Electronics announces its new book by David Benson, "Easy CNC", A Beginner's
Guide to CNC" The complete table of contents follows:
Please
note: This book is available only from us or from select machine shop suppliers.
It is not available in bookstores.
This
book was written by David Benson (8-1/2 x 11", 200 pages, $34.95).
EASY
CNC
Table
of Contents
INTRODUCTION
For experimenter
(hobbyist) or student
Overview
of topics covered in book
Examples
are 3-axis but ....
DIY, retrofitted,
or factory-built machines
USING
A COMPUTER
The basics
Copy or
cut and paste
Software
use instructions
ummary
CNC CONCEPTS
Toolpath
G-code
Axes,
origin, and coordinates
Toolpath
vs. cutter
Which
direction relative to what?
Conventional
vs. climb milling
Methodology
SOFTWARE
Overview
CNC software
Bit map
draw programs
Vector
draw programs
CAD programs
Converters
CAM
G-code
interpreters
CNC MACHINE
OPERATION
Generic
CNC machine and G-code interpreter
On-screen
user interface
Jogging
Rapid
Height
Tool library
Running
G-code files
E-Stop
and Limit Switches
G-CODE
G-code
commands and concepts
Rapid
travel at maximum feed rate = jog
Current
feed rate
Modal
commands
Interpolation
Absolute
coordinates
Driving
the tip of the tool
Creating
G-code using a text editor
Firing
up a G-code interpreter to execute a G-code file
G-code
examples
Setting
up for experiments
Rapid
travel at maximum feed rate = jog
Linear
interpolation
Straight
Right
angle
Diagonal
Circular
interpolation
Circle,
larger circle in XY plane
Arc in
XY plane
Add Z
axis
Arc
Circle
Arc using
"r" value
Toolpath
Cut and
paste
Programming
style
Instruction
placement
Comments
More complex
moves
Upper/Lower
case
Use of
tabs
Line numbers
G-code
generated by CAM programs
Complete
command set
SCANNING
AN IMAGE
Creating
a bit map file
CREATING
DRAWINGS
Basic
concepts
Pencil
Sketch
Draw programs
Vector
vs bit map
CorelDraw
Essentials
CAD programs
AutoSketch
File formats
Machining
and woodworking
Art
Sign making
Printed
circuit boards
USING
A BIT MAP DRAW PROGRAM
CorelDRAW
Essentials
Tools
Rectangle
tool
Delete
- procedure
Outline
tool
Fill tool
Freehand
tool
Shape
tool
Text tool
Zoom tool
Moving
the scales - procedure
Kidney
example
Adots
example
USING
A BIT MAP IMAGE CONVERTER PROGRAM - BIT MAP TO G-CODE
Image
file to G-code for engraving
Image
manipulation
How images
are converted by DeskCNC
Kidney
- engrave using outline image
Engraving
- using DeskCNC G-code interpreter
Kidney
- engrave using filled image
Kidney
- contour using filled image
Contouring
- using DeskCNC G-code interpreter
Kidney
- pocket using filled image
Pocketing
- using DeskCNC G-code interpreter
Adots
examples
Adots
- engrave
Adots
- pocket the objects
Adots
- pocket around the objects
Adots
- carve
USING
A CAD PROGRAM
CAD concepts
AutoSketch
Getting
started with AutoSketch
Drawing
size
Origin
Precision
Grid settings
Toolbar
locations
All-In-One
toolbar simplified
Snap modes
toolbar simplified
Snap modes
Draw a
straight line
How to
delete an entity
Edit>Undo
Line width
Zoom tool
Moving
the scales - procedure
Draw a
rectangle
Draw a
circle
Draw an
arc
Trim options
Edge
Round
(or fillet)
Bevel
(or chamfer)
Trimming
by defining a channel (object trim)
Offset
and parallel entities
Angles
- polar coordinates snap
Drawing
off the grid
Picking
off coordinates using the Inquire tool
Explode
function
DXF file
format
Examples
Link
Picking
off link example coordinates
Rotor
Pulley
Routing
curves
Vertex
- based editing
Summary
USING
A CAM PROGRAM - DXF TO G-CODE
DXF partial
part drawing file to toolpaths and G-code
using DeskCNC
DeskCNC
CAM features, definitions and use rules
Definitions
Rules
and guidelines
Direction
Effect
of direction on pocketing a single closed
region
Compensation
for contouring operations
Conventional
vs. climb milling
Tool size
and X Y step over selections for
pocketing
operations
Pocketing
out to in vs. in to out
Select>Select
Single
Two different
directions - same part
Combining
chunks of code - apend
Rules
demonstration examples
Open region
such as a straight line or an arc
One closed
region such as a circle
Two closed
regions, one inside the other
Three
closed regions inside a fourth closed region
Four closed
regions - floating
Three
regions "concentric"
Practical
Examples
Straight
line
Milling
Plasma
cutting
Arc
Circle
Contour
- follow line, cut outside, cut inside
Pocket
Rough
only, integral number of passes
Rough
plus finishing pass
Square
- contour outside
Single
pass
Rough
plus finish pass
Circle
within a square - follow the lines
Circle
within a square - contour inside the circle and
outside the square
Two directions
Circle
within a square - pocket between
As is
Add finishing
pass to pocket operation
Add contour
pass around square to remove
corner
projections
Drill
four holes
Link -
contour
Contour
Z-step roughing vs. side of end mill
roughing.
Rotor
- pocket
Pulley
- cutouts
APPENDIX
A - DeskCNC
DeskCNC
modes
DeskCNC
view controls
Art mode
Machine,
Edit, and DXF modes
DeskCNC
- viewing DXF file information on-screen
View -
show directions
View -
information tags
DeskCNC
Tool Library
DeskCNC
make a part procedure
DeskCNC
view and edit G-code
APPENDIX
B - OTHER BOOKS FROM SQUARE 1 ELECTRONICS
Easy Step'n
Future
CNC Books
PIC?
Microcontroller Books
APPENDIX
C - SOURCES
Author:
David Benson: sqone AT pacific.net
http://www.sq-1.com/
Post
Office Box 501
Kelseyville,
CA 95451 U.S.A.
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