Completny_Plan.pdf

Version 1.4

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Table of Contents

Introduction .................................................................................................................................................. 6

What is a CNC Machine ? .......................................................................................................................... 6

What is a DIY Desktop CNC Machine ? ..................................................................................................... 7

Specifications ............................................................................................................................................ 8

Overall Dimensions ............................................................................................................................... 8

Working Area Dimensions (metal base version) ................................................................................... 9

Precision .............................................................................................................................................. 10

Speed .................................................................................................................................................. 10

Power Requirements .......................................................................................................................... 10

MyDIYCNC Standard Spindle Specifications........................................................................................ 10

Possibilities .............................................................................................................................................. 11

Limitations .............................................................................................................................................. 11

Build Tools Required ............................................................................................................................... 12

Chassis Build ........................................................................................................................................ 12

Electronics Build .................................................................................................................................. 12

Terms and Conditions ............................................................................................................................. 13

Products, Content and Specifications ................................................................................................. 13

Accuracy of Information ..................................................................................................................... 13

Use of this document .......................................................................................................................... 13

DISCLAIMERS ....................................................................................................................................... 14

Plans ........................................................................................................................................................ 15

Exploded Views ................................................................................................................................... 15

Chassis Frame ...................................................................................................................................... 16

Steel and Aluminum ............................................................................................................................ 17

Wood ................................................................................................................................................... 21

Uprights and Gantry Brace .................................................................................................................. 22

Bearings Sub Frames ........................................................................................................................... 25

Motors, Couplings, Rods and Screws .................................................................................................. 30

Anti-backlash Lead Nuts ...................................................................................................................... 33

X Table ................................................................................................................................................. 35

Y Carriage ............................................................................................................................................ 36

Z Carriage ............................................................................................................................................ 38

Z Motor Mount ................................................................................................................................... 39

Spindle Mount ..................................................................................................................................... 42

Wiring Diagrams .................................................................................................................................. 43

Hardware ............................................................................................................................................ 45

Electronics ........................................................................................................................................... 46

Stepper Controller Module ................................................................................................................. 46

Spindle Controller Module .................................................................................................................. 49

Creating your Parts ................................................................................................................................. 51

Notes on Precision Cutting and Drilling .............................................................................................. 51

Rods and Bearings. .............................................................................................................................. 51

Position of Axes in Relation to Each Other ......................................................................................... 53

Building your DIY Desktop CNC Machine .................................................................................................... 56

Chassis Frame.......................................................................................................................................... 57

Cutting and Preparing Rods and Lead Screws ........................................................................................ 60

Gantry Support Uprights and Brace ........................................................................................................ 60

X Rods, Bearings and Table ..................................................................................................................... 62

Gantry and Carriages .......................................................................................................................... 64

Y-Z Assembly ....................................................................................................................................... 64

Axes Drivetrains ...................................................................................................................................... 67

Motor Couplings ................................................................................................................................. 67

Drivetrain Assembly ............................................................................................................................ 68

Stepper Motor Mounting .................................................................................................................... 70

Test Your Axes ..................................................................................................................................... 71

Power Supply and Enclosure ................................................................................................................... 71

Modifying and Preparing your Power Supply ..................................................................................... 71

Mod for non-PC operation .................................................................................................................. 72

Selecting the Required Power Feeds .................................................................................................. 72

Attaching the Electronics Enclosure (optional) ................................................................................... 73

Wiring Motors and Limit Switches .......................................................................................................... 75

Stepper Motor Wiring ......................................................................................................................... 75

Limit Switches (optional)..................................................................................................................... 75

Electronics Wiring ................................................................................................................................... 78

Connecting a DB-25 male Connector .................................................................................................. 78

Wiring the PC Parallel Port Connector ................................................................................................ 79

Power Connections ................................................................................................................................. 80

Configuring your PC and CNC app ............................................................................................................... 81

General Setup ......................................................................................................................................... 82

DIY Desktop CNC Machine Software Configuration Parameters: ....................................................... 82

KCam (Windows XP/98) .......................................................................................................................... 83

EMC2 (Linux) ........................................................................................................................................... 89

Other CNC Applications (Mach3, TurboCNC, etc.) ................................................................................ 100

Expanding Your DIY Desktop CNC Machine .............................................................................................. 101

Workspace Dimensions ......................................................................................................................... 101

Table Travel Mod .............................................................................................................................. 101

Spindle Upgrades .................................................................................................................................. 102

Stepper Motor Upgrades ...................................................................................................................... 103

Larger Stepper Motors ...................................................................................................................... 103

Salvaged and Recycled Stepper Motors ............................................................................................ 104

Electronics Upgrades ............................................................................................................................ 107

The Spindle Control Module ............................................................................................................. 107

Alternate Stepper Motor Drivers ...................................................................................................... 109

Future MyDIYCNC Developments ..................................................................................................... 109

Getting Support ......................................................................................................................................... 110

Your MyDIYCNC account ....................................................................................................................... 110

The MyDIYCNC Online Forum ........................................................................................................... 110

Troubleshooting .................................................................................................................................... 110

Appendices ................................................................................................................................................ 121

DIY Desktop CNC Machine Master Bill of Materials ............................................................................. 121

MyDIYCNC Stepper Driver Module Bill of Materials ............................................................................. 125

MyDIYCNC Spindle Control Module Bill of Materials ........................................................................... 126

MyDIYCNC Stepper Motor Signal Exerciser .......................................................................................... 126

Wiring Diagram ..................................................................................................................................... 127

DIY Desktop CNC Machine Wiring Diagram color codes................................................................... 128

Stepper Motor Mount Holes (NEMA 17) .............................................................................................. 129

INDEX ........................................................................................................................................................ 130

NOTE : For those who purchased a kit, you may jump ahead to the section

Building Your DIY Desktop CNC Machine for instructions on assembly of your

DIY Desktop CNC Machine. Those instructions, along with the product-specific

instructions delivered with your kit, will guide you through building your DIY

Desktop CNC Machine.