I've been playing with different CNC designs and Stepper controllers for many years now. I started building CNC machines long ago. My first inspiration came from Bruce Shapiro’s eggbot. I tried a few variations of it and even the board from evil mad scientist. Recently a project named GRBL came along that caught my eye. It used an Arduino to do the G-Code Interpretation. It still outputs step and direction pulses so all my existing designs worked fine with it.

The latest generation controllers I have built all use the same simple and cheap IC's. A pic 12c508 as the basic stepper driver logic and some H-Bridge chips that were originally meant for mundane things like tray loading motors on dvd players. I got a couple of hundred of these on ebay. The pic micros were from a guy that used to do mod chips with them but sold out his stock of unused chips really cheap.

I've used the cheapest parts I could find and still got great results with modest fine tuning. I used a dial indicator to see how bad my table was and it only varied .008 inches in depth from end to end. If I had used a surface planed board or aluminum plate that would have been better. I could always just mill a huge squared spiral pattern into the table to make it perfect

Step 1: Single Board or Multiple Board Modules

I've tried both ways and each has its advantages. I always keep the 110V SSR board separate. When using the single board approach I like to use an Arduino nano clone. when using multiple boards I use and arduino prototype sheild wired with a bunch of headers for the individual boards.

<p>Great job! Can you upload an electrical schematic and arduino code? </p>
<p>your idea of making this cnc machine is awesome..!</p><p>But you haven't provided full circuit diagram with arduino and its code..!</p><p>in your other instructable you have provided circuit of stepper motor controller ,but not cnc controller circuit..!</p><p>please send me the full circuit with code &quot;maheshjshetty@gmail.com&quot;</p>
<p>Are you use stepper motor driver?<br>And I want blueprint of circuit board,Can you show?</p>
<p>I used H-bridge drivers because that's what I had on hand. I did another instructable about them here:</p><p><a href="http://www.instructables.com/id/Simple-Stepper-Motor-Driver-For-CNC-Projects/" rel="nofollow">http://www.instructables.com/id/Simple-Stepper-Mot...</a></p><p>I hand-wired the protoboard by following the hookup diagram in the GRBL wiki. I never bothered to document the board since I figured everyone would have a unique take on how to assemble a cnc and make it their own.</p><p>I have since moved on from GRBL in favor of a controller that does ARC's and has a few more options.<br></p>
<p>Where is the code for the arduino and the schematic of the electronics? Could you also tell me which programs you will need to get it working? And last I want to draw in AutoCAD the things I want to mill out. Could that work?</p>
<p>The code for the arduino is on the GRBL project github, its been updated a couple of times since this was published.</p><p>there is also a hookup diagram in their wiki that I followed. I did use a couple of custom pics to drive the H-bridge chips I had lying around. if you're interested in it that code is in this instructable</p><p><a href="http://www.instructables.com/id/Simple-Stepper-Motor-Driver-For-CNC-Projects/" rel="nofollow">http://www.instructables.com/id/Simple-Stepper-Mot...</a></p>
Inventables sells a aurduino g-sheild that fits right on top of the aurduino and will control a 3-axis cnc if that helps anyone. It is what I use.
<p>Yeah I looked at a lot of those but many use the little stepstick driver chips. they like to overheat. These big SIP's easily transfer heat out. I've run the thing for 7-8 hours straight and the heat sink barely got warm. I could leave my hand on it comfortably. I wanted to do some long jobs. I guess it a matter of your intended use. My next big job is a Gallifreyan plaque for my sister. it might be the longest one yet but I wont have to worry about overheating the controller. I added an Air jet to keep the bit cool too.</p>
<p>details missing, this no how to, few interesting tips just the g code part is somehow useful, </p>
Great job with the details and explanations. It's answers many questions and makes a terrific roadmap for anyone trying to learn.
<p>hi, nice post man</p><p>can you upload de schematics and de code for the pics and de arduino? pls, so thanks</p>
<p>hi, nice post man</p><p>can you upload de schematics and de code for the pics and de arduino? pls, so thanks</p>

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