Easy CNC - A Beginners Guide to CNC

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Easy CNC is a great book for introducing beginners to CNC machines.


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CNC experimenters need to learn how to create drawings for their CNC projects using a computer, how to convert the information contained in the newly created drawing into toolpaths, and then how to turn toolpath information into the code that will control their CNC machine using a computer. "Easy CNC," covers these subjects in detail.

8-1/2 x 11" 200 Pages, Softcover.

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
  • Summary

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 - append
  • 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

  • Sources

Currency


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