Fitting all of your laser cut parts so that they squish into the least possible area on your laser cutting template can be tricky. Most of us will approach this by trial-and-error, manually shifting objects around until it ‘looks about right’. While this will save a bit of laser time, with complex designs the process can be laborious and you can’t really know whether the layout you have chosen is the best possible solution.
That’s where clever software such as Jack Qiao’s SVG Nest can really come in handy.
What is SVG Nest?
Rivalling powerful (and expensive) commercial options, the freely available SVG Nest uses all the computing muscle your browser can throw at it to come up with the optimal layout for your laser cutting. By grouping all of the elements within a defined area, the geometry-driven genetic algorithm is able to find the best fit by first setting the largest shapes, and then working in the smaller objects around them. It gets really interesting when there are many many design elements, and also when the objects to be sorted are all of a similar size.
Here’s an example using laser cut lettering:
Why is this useful for laser cutting?
As we’ve previously outlined in the Top Ten Ways To Reduce Laser Cutting Costs, how you position your designs on the Ponoko template can really make a difference to your laser cutting pricing. One of the reasons for this is that the laser head has less distance to travel between each part, and as you are paying for laser time, minimising travel is an immediate cost saving. Another consideration is the material cost itself – minimising material wastage will also save you money. As an added bonus, being thrifty with your resources can make you feel good too!
For more information about SVG Nest head to Jack’s GIT repository, where you can also see a demo of the software in action. Just be warned, it is seriously CPU intensive so those on mobile devices might want to wait until they’re sitting in front of a harder hitting machine before trying it out.
Virtual reality from Google, with laser cut parts from Ponoko
Google Cardboard is a virtual reality kit that starts with a simple viewer anyone can build or buy. It works by turning your phone into a virtual reality headset using a sheet of cardboard, two plastic lenses, a magnet and a bit of velcro.
Using laser cut parts from Ponoko, you can get started with Cardboard for less than $10.
So far there have been a ton of apps released for the platform including test drives, roller coaster rides, and mountain climbs. But it’s not just games and rides- People are finding new ways to use the kit – from campus tours to marriage proposals to vacation planning.
Anyone can build their own Google Cardboard – there are no official manufacturers and the whole kit is open source. Want to engrave a VR code that opens up your app? Go for it. Want to add custom branding? No problem. Want to design a shiny gold mirror headset? The sky’s the limit.
Since the kit is made up of inexpensive cardboard, it’s perfect for experimenting and creating your own version using laser cut parts from Ponoko.
Miniature alphabet that you can squeeze just about anywhere
When adding small text to a laser etched design, you want to make sure the font you choose will be legible.
This tiny stroke-only alphabet is available to download from the Ponoko Showroom.The free file contains the entire alphabet plus punctuations, brackets and a few other randoms. Characters are only 1mm tall. Any smaller and you will start to loose the inside of characters like ‘A’ and ‘B’ using the heavy vector setting.
On a light wood like the bamboo the light vector setting seems to work well; while the heavy setting on plastics allow you to paint fill to improve readability.
This character set was based on the free pixel font “Wendy” which you can find on dafont. Wendy was used by Stroke-Only Font creator Josh as an initial guide when laying out the line segments. Unlike the pixel font, for this example, as many line segments as possible are joined to allow easy scaling up to larger sizes.
It is worth noting that these are only grouped lines, so you’ll need to manually place letters onto your design one by one.
Using a mini font like this is worth a try if you want to inexpensively add tiny part numbers or a website/email address to your designs.
If laser engraved fonts are your thing, the Evil Mad Scientists have a great Inkscape extension that is enables even more versatility.
iPad app makes it even easier to design for laser cutting
When we first heard about the iPad app Sketch It Make It, we were pretty excited. Now that developers Blank Slate Systems have released their clever drawing app to the public, our fingers are really twitching!
Sketch It Make It is able to rapidly transform even the wobbliest scribbles into neat geometric forms, and have them ready to export for digital manufacturing almost instantly. Whether you are laser cutting, using CNC milling or 3D printing there has quite possibly never been a faster way to turn ideas into tangible objects.
Here at Ponoko, we are very serious about bringing laser cutting to the masses. So you can well imagine that our fingers are twitching with excitement at the potential of Sketch It Make It.
Developed by Blank Slate Systems, this clever little iPad app is all about quickly and easily generating files for digital manufacturing – particularly CNC, laser cutting and 3D printing. All it takes is an iPad, a finger to poke at the screen and an idea that is bursting to get out.
As is shown in the teaser clip above, your wobbly scribbles are magically transposed into neat geometric forms almost instantaneously. There are also a number of clever ways that the accuracy can be further refined down to a precision that will have a file ready for the laser cutter in no time.
Sketch It Make It hasn’t been made available to the public yet, but if you like what you see, sign up at the source to be notified when the app is released.
DIY Kerf measuring tool refines your laser cutting precision
Although it isn’t critical on all laser cut projects, for anything with parts that fit or slot together, kerf is something that is worth paying attention to.
It may sound like a Jim Henson creation – but kerf is in fact a very real technical term. Kerf refers to the gap that is left by the cutting device – in our case, the laser beam in a laser cutter. It’s usually more of an issue when laser cutting in wood, but will also come into play when laser cutting acrylic and other materials.
Open source enthusiast Dave Chamberlin has come up with a nifty device that can be used to accurately measure the kerf of a laser cutter. The simple cutting pattern has been uploaded to Thingiverse, and includes instructions on how to measure your kerf etched right onto the device itself. Here is what it looks like:
Follow the source link below to download the file and try it out on your own laser cutter. You can also discover what else Dave is up to in his open source maker crusade over at Takeaway 3d Tech.
“Meticulously illustrated tools celebrating the tinkerers and the doers: those who build, repair and create.”
Whether it’s the finely tuned measuring devices that ensure every dimension is just so, or the brute force of over 20 different hammers and mallets, somewhere on this illustrated panel will be the tools that enable you to realise your creativity.
Vintage technical publication still grooving after all those years
Before we had those nifty little electronic transistors to build nicknacks and devices out of, machines and the designers behind them relied on mechanical precision to perform tasks. Bringing to light the 1868 publication by Henry T Brown, 507 Movements reveals just how ingenious some of those mechanisms can be… and how relevant they are for today.
Even better than simply a trip down memory lane, this magical repository is just itching to be applied in some 21st century laser cutting projects.
In previous posts, we have taken a look at online 3D mechanical resources and the very handy Gear Template Generator that help to de-mystify mechanical devices. Both of these tools help to get gears working right, but what if you need a little help figuring out which gears or mechanisms to use? That’s where 507 Movements shines.
The movements are represented in both static and selected animated drawings that are kind of hypnotic yet educational at the same time.
To demonstrate how nifty geared mechanisms can be, we’ve included an impressive video after the break (assuming gears are what gets you groovin’) of some creative cogs in action. (more…)
As wonderful as CNC milling machines are, they aren’t exactly portable. Material has to transported to and from the location of the machine, and it has to fit within the work area. The Handibot is small enough to bring with you to a work site, and it can be placed wherever it’s needed on material of almost any size.
The Handibot is something between a traditional power tool and a CNC mill. It’s a power tool made smarter with a lot of help from apps and digital fabrication techniques. Learn more about it and get one for yourself on the (already) fully-funded kickstarter campaign. (more…)