Keeping track of precise measurements and the finest details just became a little easier, thanks to Sean Murphy’s updated vernier callipers on Thingiverse. He has come up with an interesting adaptation of a design that was originally intended to be cut from acrylic and then bolted together.
What did he do differently? Well, aside from tweaking the accuracy a little, Sean also laser cut the measuring device from paper and double-sided taped the two halves together.
“The result is a super thin set of callipers that can be slipped in a binder, folder, or book yet still give accuracy down to a few hundred microns.”
Very handy indeed… and because they are cheap, quick and easy to make, you could keep a set within reach at all times for refined accuracy wherever you happen to need them.
Teaching kids how to build their own mini making machines
Designed for a workshop series that introduces kids to building their own motor controllers, the Sphere-O-Bot is a simple 2 axis CNC machine that can draw on small spherical surfaces. Suggested target spheres include ping pong balls, eggs and even golf balls are apparently worth a try.
There is a thorough tutorial on Instructables that will take you through the thinking behind the laser cut wooden design, and show just how to put it all together. Files are included for the laser cut structure as well as specs for all the hardware required to get the Sphere-O-Bot up and running.
This fun project was uploaded by Juan, a Maker Corps intern at the Children’s Museum of Houston, who says:
“By building your Sphere-O-Bot using a laser cutter, you can achieve a clean look while also reducing the production time of your parts. This design also features an electronics bay for your wires, micro-controller and motor drivers.”
Using a laser cutter to make a speaker casing with style
When Chilean designer Francisco Sahli needed to take his tunes on the road, he decided the best way would be to make his own stylish bluetooth speaker.
Many makers turn to laser cutting to build enclosures for their electronic projects. What sets this example apart is the departure from the usual boxy laser cut forms, with the result looking much more like a manufactured product.
Rather than the usual slotted laser cut corners, Francisco achieved a smooth radius and angled faces by laser cutting timber profiles and then laminating them together.
The final assembly was then carefully sanded by hand, before three coats of paint were applied. You can read all about the construction process, see the laser cutting paths and find out what’s inside to make the bluetooth speaker work its magic on Francisco’s website.
Space saving portable design takes laser cutting on the road
Here is another interesting DIY laser cutter project, this time featuring a novel departure from the standard construction we are used to seeing.
Instead of running within a constrained space, the compact laser cutter has an arm that swings out in a format reminiscent of the RepRap 3D printer.
When the laser cutter is in use the arm opens up to 90 degrees perpendicular to the box and the laser head runs along it.
The main structural elements are made from aluminium extrusions, and there are a few custom CNC milled and 3D printed components to fill in the gaps and connect other off-the-shelf parts.
This looks to be a novel way to build a laser cutter that you can take on the road with you. No more heavy equipment fixed in place in the workshop… just be careful not to set it up on your grandma’s favourite coffee table!
For more info, including a thorough photo essay of the development process behind the fold-out laser cutter, click through to the source.
Running interesting laser cutter experiments is one of the things that Just Add Sharks does best. In this exploration, they have addressed the question of how to break away from the mortice and tenon joints that have become so familiar in laser cut projects.
By creating a laser cut jig that holds the material at a specific angle, they were able to cut edges that can fit together in a manner that is clean and precise. No more stepped blocks and slots! Here is what the jig looks like:
Much easier to achieve than modifying the axis of the laser cutter itself, this jig provides a firm support to a pre-cut panel, and does not require any other machine modifications. The angle of the cut can be controlled by altering the vertical supports.
“Manually changing the angles like this is tiresome so the next sensible upgrade would be to build an ‘any angle, any material thickness’ jig for the same purpose, but that is a job for another day.”
The Just Add Sharks blog has an overview by Martin Raynsford that talks through a few of the considerations that led to the first successful cut. Having proven that it can be done with standard perpendicular joints, they adjusted a few specs on the jig to produce a icosahedron, pictured below.
Giving 3D form to desktop cutting projects. Next stop, to the laser cutter!
Already well established as the gold standard for bringing super-simple 3D construction to the DIY masses, Autodesk 123D has announced an exciting partnership that goes one step further. They’ve teamed up with Cricut, the guys responsible for desktop electronic cutting machines that induce equal measures of desire and envy amongst Makers and Crafters.
The collaboration features a new series of easy-to-assemble 3D DIY projects including dinosaurs, rocket ships, creatures and homewares that are all geared towards owners of the Cricut machines.
Now, while this is a clearly targeted partnership that brings the clever slicing technology of 123D Make to users in the Cricut community, it is also a welcome reminder of the resources that are readily available and can be easily incorporated into your laser cutting workflow. (more…)
L-CHEAPO conversion kit brings laser cutting to the masses
Imagine turning a desktop 3D printer into a laser cutter without compromising its printing capabilities. That’s what Matteo Borri from Robots Everywhere has done, and the L-CHEAPO laser cutter attachment is now the focus of a wildly successful Indiegogo campaign.
Capable of cutting 3/16″ wood and 1/4″ acrylic on any hobby grade 3D printer or CNC mill, this clever little attachment runs off the existing machine’s power supply and software environment. Once the attachment is set up and configured, in a matter of minutes you can swap back and forth from laser cutter to 3D printer functionality.
“you can switch from laser to printer mode and vice versa in less than two minutes, with no tools”
Why would you want to do this? For one thing, laser cut parts tend to be much tougher than the thermoplastics used in 3D printers. This means the scope of making possibilities is significantly widened, all from the one machine.
Matteo is looking out for the little guys with this project, with the goal of making laser cutting accessible to those who might otherwise be hindered by the substantial initial investment that is traditionally associated with purchasing a laser cutter.
“I hope that this allows high school shop classes, small universities and local hackerspaces to be able to work with a wider variety of materials and techniques”
He also promises that there are larger, more powerful lasers in the works. It will be interesting to see what the big brother to L-CHEAPO is capable of.
The 3D printed component is available to download fromThingiverseand you can head toIndiegogofor further info and project updates.
Here’s a little extra, just for fun. Proving that he is serious about his DIY laser cutting prowess, Matteo uploaded this geekily amusing clip of the Tetris theme song, as played by an L-CHEAPO laser cutter in action.
When Jens Clarholm built his impressive DIY laser cutter, he was well aware of the limitations imposed by the low powered laser. While it may not cut through wood or steel, it does do a very neat job of cutting paper.
One great way he has explored this is by having a play with StippleGen2, a nifty program from Evil Mad Scientists. The program uses a special algorithm to convert an image into tiny dots. There are a number of ways to manipulate how it does this, as the calculations are repeated over and over again and the final graphic is refined. StippleGen2 is easy to use and a lot of fun.
For this experiment, Jens chose an iconic image of Louis Armstrong playing the trumpet.
After letting StippleGen2 crunch the numbers for a while I imported the resulting vector graphic file into inkscape and generated the G-code so that I could use my laser cutter to cut the image into black paper.
The cutting process took a little over 2 hours, which isn’t too bad when you consider that there are over 1000 holes in this particular image.
There is a lot more that StippleGen2 can do, so if you are intrigued by Jens’ experiment you can have a go with StippleGen2 yourself or learn more about Jens’ DIY laser cutter here.
Providing the magical ability to scan not only the surface, but also to reveal details of the insides of an object, the CT (computed tomography) scanner has quite literally changed the way we see ourselves.
Modern CT scanners are frightfully expensive and are usually found in hospitals but Canadian-born Peter Jansen has built one himself out of laser cut wood.
“After seeing the cost for my CT scan, I decided it was time to try to build an open source desktop CT scanner for small objects, and to do it for much less than the cost of a single scan.”
With a design quite similar to the early commercial CT scanners, Peter’s device began as a quarter-scale laser cut acrylic version that he whipped up in a single day.
He then used this mockup to help refine the design, under the watchful gaze of a friendly house cat. (more…)
Imagine controlling a serious laser cutter with the dynamic ease of an Etch A Sketch. Having first toyed with the idea years ago, Just Add Sharks have finally followed through and attached a fully functional Etch A Sketch controller to their laser cutter. Talk about dreams coming true!
Complete with authentic twiddly knobs and retro-Etch styling (all laser cut, of course) the modification uses an Arduino Pro Mini to bypass the machine’s existing wiring.
Click through for a video of the controller in action, where you can see the different functionality of either Etch or Cut being demonstrated.