IndyMill is a project started by Nikodem Bartnik as an upgrade of Dremel CNC machine. The basic idea behind this project is to create easy to build CNC machine that anyone around the world can reproduce. Using popular, easily available components is only one of many challenges on the road. Great documentation is just as important as good design, those two have to come together to create an outstanding project and that’s the goal. Below You can see up to date list of videos and some pictures of this project, together with files and parts list. Also, subscribe to the newsletter to stay up to date:
Parts list
Below you can find tables with all the parts that I used to build IndyMill. I even counted every single screw for you (but make sure to buy some more just in case). The table is divided into mechanics and electronics if you prefer an excel sheet that you can easily print, export and open on your computer you can find it here:
https://docs.google.com/spreadsheets/d/12oHk9QJb_xA03L3f4UTsMpm9c1XGWciNTpjuxPadvEA/edit?usp=sharing
To make it easier for you to build IndyMill I am slowly adding more products to my store so that you can easily buy and build your machine if you want. I just recently added a set of screws and bearings:
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IndyMill Screws & Bearings$49,00
Mechanics
Electronics
| Name | Quantity | Banggood | Aliexpress |
| Nema23 Stepper Motor | 4 | https://bit.ly/2Y0BnrI | https://bit.ly/2xpnVTR |
| IndyShield | 1 | – | – |
| TB6600 Stepper Drivers | 4 | https://bit.ly/33VQFSs | https://bit.ly/2PSt2lG |
| Arduino UNO | 1 | https://bit.ly/3gVqtLs | https://bit.ly/3gVqtLs |
| Power Supply 12V 30A | 1 | https://bit.ly/30RaqZA | https://bit.ly/3kJOtDu |
| AC Socket | 1 | https://bit.ly/30Tk2mr | https://bit.ly/30REsfK |
| Cables | – | https://bit.ly/2PQ2qlc | https://bit.ly/3kH9TBh |
| 4 pin Connectors | 4 | https://bit.ly/30UUpSi | https://bit.ly/3am7dUU |
| 500W Spindle | 1 | https://bit.ly/3gVpcnx | https://bit.ly/3iCR4NJ |
| 1.5kW Spindle | 1 | https://bit.ly/3kGN4O7 | https://bit.ly/2PMiLHE |
| Inverter for 1.5kW Spindle | 1 | https://bit.ly/2E0aHQO | https://bit.ly/2PMiLHE |
Build instruction
Above parts list and files down below is everything that you need to build the IndyMill. It’s open-source so you don’t have to pay anything for the files or design. But I thought that I will make a detailed instruction so that it will be easier for some of you to assemble this project and at the same time support my work. It’s 40 pages long, there are over 60 drawings and a lot of useful information on the assembly process. It’s a PDF file so you can put it on your computer, smartphone, tablet or even print. And it’s only $10. Let me say it again, you don’t need it to build this project, but if you want to simplify the assembly process and support my work at the same time, you can get the instruction here:
You can also buy the instruction in my store:
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IndyMill Build Instruction$10,00
Files
Below you can download DXF files, you can use those files to order laser cutting of the parts. Those should be cut out of 6 or 8mm steel or aluminum.
If you are going to order or manufacture that on your own just simply send those files to a company with a laser cutter that is able to cut steel. Make sure that they can cut all of the holes. You need every file cut only once. There shouldn’t be any problems with making all plates out of 6 mm steel or aluminum but my advice is to cut rail support 1 and rail support 2 out of 8 mm thick material (some extra space for lead screw nut is always helpful). All DXF files are in mm.
I am also selling kit of steel plates for IndyMill The kit is powder coated with RAL5019 and I manually tap all the holes so the kit is ready for assembly out of the box. If you have any questions regarding the kit please let me know!
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IndyMill Bare Steel Plates Kit$119,00 -
IndyMill Steel Plates Kit$159,00
| Name | Quantity | Material Thickness |
| 500W Spindle Plate.dxf | 1 | 6 mm |
| Motor Support Left.dxf | 1 | 6 mm |
| Motor Support Right.dxf | 1 | 6 mm |
| Screw Support Left.dxf | 1 | 6 mm |
| Screw Support Right.dxf | 1 | 6 mm |
| X Axis.dxf | 1 | 6 mm |
| Y Axis Left.dxf | 1 | 6 mm |
| Y Axis Right.dxf | 1 | 6 mm |
| Z Axis Motor Support.dxf | 1 | 6 mm |
| Z Axis Rail Support1.dxf | 1 | 8 mm |
| Z Axis Rail Support2.dxf | 1 | 8 mm |
You will also need some 3D printed parts, you can find all STL files in the ZIP archive below. Make sure to print all of them with infill above 40%. I know it’s not ideal to use 3D printed parts, soon I will try to upgrade that with something made out of aluminum on IndyMill. Below you can also find the table with quantities of each component that you need.
| Part Name | Quantity |
| 6000 holder.stl | 3 |
| X axis ball screw holder.stl | 1 |
| X axis nut holder.stl | 1 |
| Y axis ball screw holder.stl | 2 |
| Y axis nut holder left.stl | 1 |
| Y axis nut holder right.stl | 1 |
| Z axis nut holder.stl | 1 |
| Z axis bearing holder.stl | 1 |
Videos
Here are all the videos that I made about IndyMill (plus updates below). I highly advise watching all of them before starting building one. There is a lot of useful information in each one of them and step by step assembly process showed. Also, you can take a closer look at fails, design process, and some problem-solving 🙂
IndyShield
IndyShield is an Arduino UNO based shield with screw terminals to simplify electronics connection in your CNC router. It’s designed to work with GRBL so you can easily use it not only for IndyMill but actually for any other CNC machine that you want to build. You can download PCB design below and if you want to buy it check out my store:
Of course, because my project is open source below you can find ZIP archive with all the design files of IndyShield (designed in Eagle). Feel free to modify it and share with others just remember to put a link to my project 🙂
If you want to support my projects (It would be highly appreciated!) You can do it through Patreon (link below). You can also support me through paypal!
Upgrades
I decided to add limit switches, z probe, emergency button, LED light and threaded waste board as I thought those updates are the most useful for me. I am working on clamping system for that waste board and dust shoe (I want to create a very universal and easy to make dust shoe for 500W spindle). Limit switches holder stl file can be found in ZIP archive with all STL files in the files section above. Here you have links to some of the things I used for upgrades:
| Name | Quantity | Banggood | Aliexpress |
| Limit switches | 3 | https://bit.ly/368SJHr | https://bit.ly/3fEjhDu |
| Emergency Button | 1 | https://bit.ly/39fvbmi | https://bit.ly/2VeLozH |
| LED Strip | 0.5 m | https://bit.ly/3mdu620 | https://bit.ly/3lapRTC |
| M8 Knock In nuts | 30-50 | https://bit.ly/368rL2K | https://bit.ly/2JnrIqE |
DIY ball screw covers
I made very simple DIY telescopic ball screw covers out of PVC to protect the screws and keep everything working fine for a long time. Below you can see my video where I explained how I made that and you can also find right there ZIP archive with all STL files needed to add this update to your IndyMill!
500W Spindle Dust Shoe
I designed and made my own universal version of a dust shoe for 500W spindle (really popular Chinese spindle). It is very simple to make and work really well. You can find more info about my dust shoe in the video below. You cna also download for free files that you can use to make it on your own (those files are also on my github).
“Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning.”
~Winston Churchill
IndyMill Created by Nikodem Bartnik in 2019/2020