materials you can cut with the Foam cube hotwire system

CNC Hotwire foamcutting materials

With Foamcube you can process a large variety of  foam products ranging from Simple hardware store grade EPS to very dense and sturdy EPP blocks. Below are some of the materials you can work with. Any material that melts in a temperature range of 50 to 300 Celsius can technically be cut with Foamcube. By adjusting speed or wire temperature* you can tune in to a perfect cut with a narrow kerf and a smooth surface.

 EPS 60  | EPP 50 | XPS



EPS – expanded polystyrene

EPS foam typically ranges from EPS 60 to ESP 500. EPS 60 is the stuff you buy at the hardware store, it is very cheap and often used for insulation. When EPS-60 is cut it is smooth but still shows some of the open structure. The higher the EPS number, the more condensed and heavy the foam will be. EPS 300 and up are very dense and can be sanded and have some structural abilities. (furniture, floating things, stage props etc.)

EPS-60 typically cuts fast and needs relatively low temperatures to cut (approx. 25 mm/sec @ 220-240 Celsius). Higher numbers mean lower speeds or require higher wire temperatures.

Low grade EPS 60

EPS 100 demo

XPS – extruded polystyrene

xps a.k.a. styrofoam a.k.a. styrodur a.k.a. styrisol is much denser than EPS and has better insulating properties. It can be purchased at local hardware stores and typically has a yellow or blue color. XPS sheets often act as a composite material because the top and bottom of the sheet are more dense than the middle part. Because of this reason it requires a different setting on your Foamcube and it also matters if you cut sheets perpendicular or parallel. XPS cuts a bit slower than EPS and prefers higher temperatures but has a very smooth finish. (approx. 12 mm/sec @ 250-270 Celsius).

styrisol sheets (XPS) give smooth finishes but cut slower



EPP – Expanded polypropylene

Epp is an eco friendly foam that is typically very dense and has high structural integrity. When cut it makes tough parts that can handle a beating. E.p.p. is a bit harder to come by, but you should be able to find a few suppliers on the internet that are willing to cater. Due to it’s dense and rugged nature EPP cuts slow but it’s well worth the extra time. EPP wants a hot wire so be prepared for a beefy power supply or a short hotwire. (approx. 10 mm/sec @ 270-280 Celsius).

Rugged and dense EPP foam


 Foamcube uses a 0.22 mm. hotwire and has a very narrow kerf width.


PE – Poly Ethylene Foam

PE Foam is very easy to cut and is ideally suited for inlays, protective casings, molds, furniture, or to build large very lightweight decor pieces in very little time. Polyethylene foam edges are very clean when cut with a foamcutter / hotwire and the material is fairly cheap, comes in dozens of colors and all kinds of sizes.

Dozens more ….

While the materials above are most often used in our lab, there are naturally dozens of other materials you can cut and style with our CNC Foam cutter. Feel free to experiment and play. Foamcube can handle some abuse and loves new stuff to chew on ! Found a new material to play with ? Please let us know …..

a word about NiCr hotwire length for foamcutters

nicrFor Foamcube we use NiCr type hotwires. NiCr stands for Nickel Chromium.

The NiCr wires are strong, can handle high temperatures and do not expand too much when heated. They are also available in very small diameters so the kerf of our foam cuts can be nice and tight.

Since most Foamcube wires are either a maximum of 50 cm. or 100 cm. we use the same wire for both and simply vary the voltage running through the wires. Ideally we want a temperature range of about 220 – 300 Celcius, which can easily be achieved by using either 12 volts or 24 volts.

The wire we use has a resistance of 22 Ohms per meter and has a diameter of only 0.254 mm. It’s right in the sweet spot.

When we apply 12 Volts DC to a 50 cm. long wire, it’s temperature hovers around 250 Celcius. It draws approx 1.1 Amps from your power supply.

When we apply 24 Volts DC to a 100 cm. long wire, it’s temperature hovers around 250 Celcius. It draws approx 1.1 Amps from your power supply.

So by doubling the input voltage you can make the hotwire twice as long keeping the same temperature range. This also implies that by controlling the input voltage you can control the temperature of the hot wire.

When you build your own foam cutter it is recommended to keep your wire length at maximum 40 cm. (12 volts), 90 cm. (24 volts) 190 cm. (48 volts) etc. Power supplies in increments of 12 volts are easy to find and are a lot cheaper than having to acquire say a supply of 28 volts. By keeping the wire length a little shorter you will have a wider temperature range to cut denser type foams using off-the shelf power supplies like ATX supplies from an old computer, LED power supplies from China, or even your typical plug-in-the-wall power supply that delivers more than 1200 milli-amps.

We carry spools of Ni-Cr wire in our online store for your convenience. If you source your wire locally make sure it consists of Nickel and Chromium  (no iron, aluminium and other traces) and has a resistance of 22 Ohms/meter at room temp.

Foamcube safety sheet & quick start guide

Foamcube safety sheet

Foamcube d.i.y. Kits are distributed by :
Bijbibi / Fablab013
Groenstraat 139 Hal 553
5021 LL Tilburg
the Netherlands
+31 6 373 402 83

online manual :

With Foamcube comes your own personal online drive. It contains important documents, settings, manuals and instructions. Please take time to familiarize yourself with these documents first.

your personal online drive :


Do it yourself kit & limitations

Please note that all Foam-cube kits are delivered as a collection of loose parts that need to be assembled by the end-user into a usable machine. Although efforts were made to make these products as safe and easy as possible, the distributor can not make any guarantees towards the final product regarding safety or compliance to local rules that may apply in your country or region.

Before you build your machine you should be aware of any regulations that may apply to you when implementing such a machine in a private or (semi)public setting. Note that as the constructor of the machine you take on sole responsibility for safety and compliance and indemnify the distributor against any claims or damages.


Potential safety hazards you may encounter

  • Foam cutting machines like Foamcube have electrical parts that may overheat, melt or catch fire. Never leave your machine unattended when it is plugged in.
  • Foamcube uses a hotwire to cut foam. Wire temperatures can run as high a 1000 degrees celsius ! hotwires, when touched, may cause severe and painful 3rd degree burns.
  • Hotwires can easily ignite other sources and start fires.
  • When cutting material with hotwires you may generate noxious or poisonous fumes. Take proper precautions.



  NEVER connect or disconnect electrical connections when your Foamcube is powered on, plugged into mains, or connected to the USB port.

This WILL destroy the stepper drivers inside your controller.

Welcome to your online drive for Foamcube support. In this google drive folder you will find various documents that will help you get the most out of your Foamcube CNC hotwire foam cutter.

Installing software

As of Jan. 2018 all Foamcubes will be powered by Arduino microprocessors. The software is already pre-loaded onto your arduino controller. To install upgrades or newer versions of the controller software you can use the “XLOADER” software to upload a new “HEX” file into your controller. Both xloader and the HEX files can be found in your online drive in the “software” folder.

HEX files are pre-compiled software packages that can be uploaded to your controller without hassle or difficult settings. Foamcube HEX files all have names with the build-date in them so it’s easy to find newer software for your Foamcube controller.  Name formatting for HEX files : YEAR-MONTH-foamcube…….hex (e.g. 2018-01-foamcube.hex)


building your foamcube

If you have not yet started assembly of your cube you can find a standard online assembly manual here :  Please see the “assembly” menus on the top of the page. Note that your cube may look different so use the guides loosely as Foamcube is always under development to improve user experience.

Need more help ?

While most people have no problems building and running their cube we understand if you have more questions. Please post general questions in our forum and we will do our best to get you an answer within 24 hours :

Demo files

In your online drive you can find a folder called “demo files”. It contains some .DXF and gcode files to get you started quickly.

Simple 2D  shapes

Flame : load the .dxf file into the usbcnc software and cut it out of a small sheet of foam.

3D shape out of a 2D file

candle 2 : cut it out of a small piece of foam. Then turn 90 degrees and cut it again.

3D shape

candle 1 : cut it out of a sheet that is at minimum 10 cm thick. after it was cut, turn it 90 degrees and load “candle 2”. Now cut candle 2 through candle 1 to get a 3-armed candelabra.


Load bal72.txt as a gcode file. Set rotation platform to 5 degrees. Start the cut and see the bal take shape in 72 cuts. (This is probably the most inefficient way to create a shape like this. Using ping-pong mode in our online gcode builder will be far more efficient.)

online gcode builder – ROTATIONCUTS

Once you are familiar with all the options and settings on your Foamcube you may want to play with our online gcode manipulator a bit. It helps you transform simple 2D outlines into 3D shapes. The gcode it generates can be loaded into usbcnc directly. Don’t be fooled by it’s simplistic appearance. When you put in more complex shapes, you get very complex 3D shapes as results. Experiment !

you can find the online gcode builder at :

French lilly – cnc foam examples

We can imagine that by now you are curious to see some products made with the foam cube. While engineering focus was first and foremost on machine design we did create some simple products to test and demonstrate the machine.

The french lilly’s very recognizable shape was imported as a .DXF file into the CNC cube software and then copied front-to-back to make both sides of the machine mirror eachother.

french lilly’s in the foamstyler software


As a matter of testing the machine we decided to put a full pack of styrofoam panels into the machine and turned it on.  The pack was held in place purely by it’s own weight as the hotwire never pulls or pushes on the product.

thick or thin material ... the hotwire sees no difference
thick or thin material … the hotwire sees no difference

As you can see on the pictures this is a very easy way to create a lot of similar products in a very short time. The hotwire is only 0.3 mm. in diameter, and with the correct speedsettings it’s easy to have it make a very narrow kerf and tight corners.




Learn about our CNC Foamcube

We’re happy you came here to learn more about our CNC cube !

Foamcube came to life in 2013 . Since then it developed into a 5-axis computer controlled foam cutter that will allow you to create very complex foam shapes within minutes. It can be used to cut huge letters, wings, tables, chairs, columns, ornaments, stage props, art and more.

The CNC foam cube was invented and developed in-house at Fablab013 (Tilburg – the Netherlands) by Pete Scheepens. On March 25th 2015, the Foamcube project successfully got funded through a kickstarter campaign that went well beyond it’s initial goal. This allowed the Foamcube team to jump-start production and engineering and it has helped to make Foamcube available to everyone worldwide. You can now find Foam cubes on every continent at Universities, tech-shops, museums, High Schools, workshops and in your neighbors garage.

Foamcube is open source where possible and you can build the project from scratch yourself if you want to using our online assembly guide. You can also order pre-built kits directly from this website.If you don’t want to tinker with it, you can also order a custom made pre-built and pre-tested machines per your specifications here.

Our foamcutter is still actively being maintained and developed ! Exciting new features are being added all the time. Check back regularly.

Foamcube V 4.0 – Februari 2017


Foamcube V4.2 May 2017