My DIY CNC

My DIY CNC
www.MyDIYCNC.com
Builders Comprehensive Plans and Construction Manual
Desktop CNC Machine Plans & Operator’s Manual
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
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