The Ins and Outs of Laser Cut Holes

How to get your design right for attachments to laser cut jewellery

from the Ponoko Showroom – left: madebydan, right: SuperVery

One of the most popular applications of the Ponoko Personal Factory is to make custom jewellery. This post covers advice on how to optimise your design for attachments that enable laser cut jewellery to actually be worn by someone.

Making jewellery is an excellent way to get a feel for laser cutting and try out a range of materials. Popular rigid materials include plywood, acrylic, veneer mdf, bamboo, metals; while leather and felt are commonly used soft materials.

Much of the jewellery is based on 2D shapes, so minimal prototyping is required to get the optimum result in final product. However, there are still a few problems that jewellery makers run into. Many of those are the result of not considering how other components or findings, such as jump rings, clasps, pins, etc will be attached. The other contributing factor is material durability. You have to use enough material to avoid breakage.


left: chromatophobic, right: taprobane

If you are wanting to attach a chain to your jewellery, you need to cut a hole somewhere in the shape for the jump ring that will hold the chain. But where should the hole be placed, and how big does it need to be? These details are determined by the combination of material thickness and overall design. Your design and material choice dictate the size of hole and size of jump ring to be used.

You need to leave enough material around the hole for it not to break, so it’s worthwhile checking Test Cuts photos in each of the Ponoko materials to get an idea of how finely you can cut the material. However, if the hole is too far inside the design it will not only compromise the aesthetic, but get in the way of the jump ring.

Material thickness Recommended hole diameter Recommended jump ring size
3.0mm / 0.118in 2mm / 0.079in 5mm / 0.197in
4.0mm / 0.157in 2.5mm / 0.098in 7mm / 0.280in
5.0mm / 0.197in 2.5mm / 0.098in 9mm / 0.354in
7.0mm / 0.280in 3mm / 0.118in 11mm / 0.433in

If you’re unsure whether your hole placement is functional, you can quickly draw a 1:1 cross-section of your material with different size holes and position your jump ring over the image to check the fit. The diagram below is an example.

Note how in this example, you can see that this figure illustrates how a 2mm hole in a 7mm thick material is too narrow for a jump ring to fit through.

Sometimes a circular hole just doesn’t work with the design, but don’t let it stop you. Instead, you can make the hole follow the contours of the design, which is more considered, or better yet, make it an integral design feature.


chromatophobic, Anna Corpron

This content originally appeared in a post on the Ponoko blog by Yana Skaler.

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Top Ten Ways to Reduce Laser Cutting Costs – Tip #1

Make a Digital Prototype Before You Spend Any Money

When you make something with Ponoko, there are 3 key costs to consider:

Making, Materials, and Shipping.

Making cost is all about labor — mostly machine labor and a little bit of human labor. Think of your design file as a work order; a set of instructions for the machine to follow. The simpler and more efficient your instructions are, the less time it takes the machine to follow them. And that means lower making costs.

Materials vary greatly in cost and your material choice will also have an impact on making time. The general rule is that thinner (and lighter) materials will cut faster, and the quicker your design gets cut the less it will cost you.

Shipping costs can have quite an impact on smaller projects, so see if you are able to combine several products onto a larger sheet size to reduce the per-unit price. For larger or more complex designs, it may be worthwhile taking advantage of Ponoko’s $100 free shipping threshold.

In this series of posts, we expand on each of these areas to give you the 10 best ways to keep your laser cutting costs down.


Tip #1: Digital Prototyping

Before spending any money, you can actually save a surprising amount just by tweaking the order process so that everything works in your favor.

Ponoko users may be familiar with the Product Recipe, a handy Ponoko walkthrough that new users are taken to as an introductory tour after creating an account.

A part of the process that is explained is the concept of Digital (or Zero Cost) Prototyping. How this works is that the Personal Factory is used to price many different design iterations instantly, revealing where the project can be optimised to save money on laser cutting, shipping and more. The best part is that you get all this valuable information without spending a single cent.

As you’ll see in the following results, that’s time well spent.

The Product Recipe example features a laser cut coaster that goes from an initial quote of $5.40 per unit down to $1.64 per unit prior to anyone opening their wallet.

That is quite a saving. Exactly how this was achieved will make more sense as we work through our 10 rules for keeping laser cutting costs down. Stay tuned for Tip #2: Paper prototypes, and let us know in the comments below if digital prototypes have helped you save money with your own laser cutting.

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Comparing Stains on Laser Cut Wood

How to add a little something extra after all the cutting has been done

With all of the different material options available for laser cutting, it may seem like you are spoiled for choice. But sometimes it is nice to have a little more control over your finished outcome, and that’s were oils and wood stains can do wonders to transform the look of a material.

In this handy test-run and resulting visual comparison, Josh has taken a look at some of the popular Ponoko materials and how they perform with different finishes.

As well as putting together the table pictured above, he has noted down a few handy tips and material highlights that will help you make the right choice for your own laser cutting. Read on in the Ponoko Support Forums and learn how you can get the best possible outcome with stains and finishes on laser cut wood.

This content originally appeared in the Ponoko Support Forums.

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Ideas for Creative Agencies & Brands – #3

Laser cut & engraved stamp

The tactile satisfaction of a physical stamp can help give your brand a memorable impact. The example above includes a simple but cleverly designed laser cut ergonomic handle which also has several surfaces where further branding or information can be laser etched.

Whether a laser etched stamp is produced as a promotional item to be given away, or as a tool to apply branding onto media for prospective customers, there is a novel human element to it that can communicate at a deeper level than conventional printed materials.

Creative modern interpretations of seemingly superseded technologies are a great way to make use of the Ponoko Personal Factory. Don’t see laser-safe natural rubber in the Materials Catalog? Make a request here, and your wish is our command…

Let us know in the comments below if you’ve seen laser cutting used in this way for promotional products.

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Laser Cut Vertical Axis Wind Turbine

Capturing the breeze for DIY power generation

This work-in-progress from Auckland-based scientist Dr Chris Pook looks to be moving along quite nicely. The aerofoils are still being refined, but even in their current state they are able to catch enough breeze to begin generating power.

I’m really pleased with how much of this turned out. The frame, the spindle and the arms all look just like the CAD design.

To see the thorough walkthrough of Dr Chris’ design process, follow his thoughts and progress here. This is a great example of how laser cutting can be used to generate progressive iterations of a design, continually refining towards a highly optimised final outcome.

via Dr Chris Pook

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How to oven form laser cut acrylic

A handy tip for when flat isn’t all that

Today we are taking a look at one way to give your laser cutting a boost and take it beyond the constraints of two dimensions. Utilising the thermoplastic properties of acrylic, it can be surprisingly easy to apply heat and then carefully form laser cut objects into more complex shapes.

Back in her student days, Kiki Brown Bear fired up the oven in her kitchen to soften her laser cut flatware, and then made use of actual forks and spoons as molds to get the shape she wanted. Follow her process over at Instructables, where you can find step-by-step photos and a brief video of the technique in action.

If you like the sound of this and want to explore further, there are all kinds of objects around the home that can also be used to help shape softened acrylic. We have seen some people laser cut custom profiles in MDF or ply, and then laminate them to create a DIY acrylic mold. To get heat into the acrylic, it is possible to use hair dryers, heat guns and grills (as well as ovens) to soften the material and get it ready for molding into shape. Just be sure to ventilate the area as much as possible, because those acrylic fumes are not so pleasant.

via Instructables

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Hands-on with home 3D printing in 2015

Reflections after 16 hours with a new 3D printer

As a spectator, it may appear like 3D printers are getting closer than ever to being as easy to use as a desktop inkjet printer. For those who have purchased (or indeed built) their own 3D printer over the last few years, you’d know that this is not the case. There is a lot of tweaking, upgrading and also patience required to get this amazing technology up and running in your own home.

Scott Hanselman plunged into the world of 3D printing and has published an hour-by-hour account of his first two days (16 hours of ‘working’ time) with the Printrbot printer. It’s an engaging tale of triumphs and woes, with much useful advice for others who may be wondering whether to purchase a printer of their own in the near future.

I’ve been using this printer now for basically 16 total hours over a few days, so we’ll call it two days. I went through a number of emotions over this last two days an learned a TON, some about the Printrbot Simple Metal specifically, but also about 3D Printing in general.

Click through to read the full account and discover why Scott’s concluding thoughts are positive and optimistic about the future of home 3D printing.

via Scott Hanselman

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Ideas for Creative Agencies & Brands – #2

Pop-up record player keeps customers in the groove

For a promotional product to make a lasting impression it can help to find a clever way to surprise and delight the recipient. Take this example from Canadian ad agency Grey who created a memorable direct mail product that references the client’s historical association with vinyl records.

A very basic but fully functional record player folds out from a sleeve containing the 45rpm single. Manually operated, the hollow space in the folded card amplifies the sound. According to Geoff Dawson from Grey:

“It’s actually shocking how good the sound quality is, it took a long time of playing with different materials and designs to get the audio just right”.

For a little more on the Grey player, check out the brief review on Modular 4.

Here’s another take on the same concept, this time in the form of a rather charming wedding invitation featuring more refined graphics and a custom song for the recipient to spin. Have you seen something like this before? Let us know in the comments section below.

Taking inspiration from these examples, the Ponoko Personal Factory can be used to make simplified interpretations of other familiar domestic products. This is a great way to get your message across at high volume and low cost.

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How to transform an existing product

IKEA product hacking gets a facelift with some custom laser cutting

stairlight2.jpg

Mass produced commercial products can make a fantastic base for custom laser cut additions. This IKEA wall fixture hack by Josh Reuss was originally posted in the Ponoko Support forums Show & Tell section, and provides a nicely resolved example of how laser cutting can be used to transform an existing product.

There is more to this than simply cutting out a shape that slips over the manufactured fitting. Josh came up with some clever ways to create the full sized panel from several smaller components, while keeping all joints concealed and obscured by the pattern details.

Follow the link for a thorough walkthrough of the process that saw an off-the-shelf product become a unique, eye-catching designer item with surprising ease. (more…)

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Design tip: Ponoko Color Palettes

Keep these swatches handy to streamline your workflow

Here is a neat tip from the Ponoko Support Forums. Follow the links below to download Ponoko-friendly custom color palettes for your favorite drawing application. Each file contains the necessary cutting and engraving values that will make sense at our end, where the magic happens.

The original post has files for Illustrator, Corel Draw and Inkscape.

Here’s a quick look at the installation process using Illustrator CC.

1. Download the Ponoko color swatch file for Illustrator: ponokoswatch.ai.zip

2. Unzip and move the file to (for Mac systems) Applications > Adobe Illustrator > Presets > Swatches
(For Windows systems replace Applications with Program Files)

3. Import your Palette:

Open Illustrator and go to Window > Swatches to make your Swatches panel active in the sidebar.

Click on the small arrow at the top-right of the Color Palette and select ‘Open Swatch Library’ and then ‘Other Library’.

Browse to your ‘Swatches’ folder and select ‘Ponokoswatch’, then click ‘Open’.

To keep things nice and straightforward on your screen, it can be helpful to expand the color icons into a list.

Click on the small arrow at the top-right of the Ponokoswatch panel and select ‘List View’.

Now you’ll have all the info right there, making it even easier to create design files for laser cutting with Ponoko.

Here are the files for each application:

Illustrator: ponokoswatch.ai.zip
Inkscape: Ponoko.gpl.zip
Corel Draw: ponoko.cpl.zip

Adapted from a post on the Ponoko Support Forums.

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