MDF Laptop Stand
Instructions
Import the model
The model I'm using came from this project on Thingiverse: http://www.thingiverse.com/thing:49812 by user MatthewOwen. I used the STL file which he made to generate my own custom sized slices using 123D Make.
Set the manufacturing settings
The default settings are for laser cutters, but we can easily adjust them for the Shapeoko or other CNC mills. Just enter the bed size as the width and height, enter the material thickness (measure with calipers first!) and enter the bit size you'll be cutting with.
Set the "Construction Technique"
There are many options under the "Construction Technique" dropdown. They refer to different ways to slice up the 3D model into 2D panels. The one that works best for this model is "Interlocking Slices", but play around with the others too!
Set the relief type
Because I'm using a 0.125" bit to cut out the design, I have to make sure that the inside corners of the interlocking slots are "dogboned" to make sure the pieces can fully slot together. Luckily, 123D Make had a built in option for this!
Adjust the slice configuration
Now the sliced model still looks a little crazy (and physically impossible), so lets wrangle that by adjusting the slice number and slice axes. The slice axes can be adjusted using the blue and orange handles. It is a bit hard to manipulate them at first, but the trick is to use the subtle snapping that happens at the 90 degree points. With a quick flip of the axes, the model looked like I wanted it to (and became physically possible to stand up).
Export the design
I planned on using VCarve to create the toolpaths so I exported the design as a DXF.
CAM the design
I imported the DXF file into VCarve and adjusted their positions to make it easy as possible to cut the parts. I made two separate plates using the "Layers" functionality in VCarve. I set the paths to all be outside profiles, with a depth equal to the material thickness and set the bit size I was using (0.125"). Then I exported the g-code
Or use Easel to cut the design
I imported the SVGs into Easel, set the cut type to "Outline - Outside" and set the material thickness to the thickness of the MDF. Since it needs two plates of 12"x12" material, I made two separate Easel projects: "plate1":http://app.easel.com/projects/Y0IQHujCyvCFiZolHTjkNw and "plate2":http://app.easel.com/projects/irhG-1zLYWhiZjYcPx3fHA
Comments
wow. this is what i want it for a long time.. thanks for sharing.
Abdurakhman Smazov · August 08, 2014
I'm glad you like it!
Paul Kaplan · August 08, 2014
I notice in your photos you are using tiny shims. Was this because the drawing dimensions the tolerances of the shapeoko? Just curious if 123D is purposely making the slots larger. The dog bone feature is great!
Kurtis Saiyo · August 09, 2014
...dimentions *or* the tolerances... Apologies.
Kurtis Saiyo · August 09, 2014
I meant to make a note on that, thanks for reminding me. I made this design assuming the MDF was exactly 3/8"... bad idea. I had to shim it quite a bit. I recommend going through the steps once you have the exact material you are planning on using measured with calipers.
Paul Kaplan · August 09, 2014