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cnc frame – CNC Maker Zone

Tidying up 2020 CNC frame extrusions with a 3D printed end cap

Aluminium extrusions are common on low-end mini CNC machines, particularly the 20mm square 2020 variety. In some cases, such as my cheap Chinese 1610 CNC machine, they’re used to create the whole framework for mounting stepper-motors, spindle motors, LASERs, controller boards, and all manner of other things. Yet, they’re often left open, basically as cut, at the ends. So, I decided I’d design some simple end caps in OpenSCAD to 3D print: you can see the result in the photo below.

A photo of an unpainted 3D printed end cap inserted into the end of a 2020 extrusion on a CNC frame

The design is very simple but that makes it easy to print without any supports. Once printed simply push it into the end of the 2020 extrusion to seal and tidy the frame end. And, adding a little paint can make it blend in with the extruded aluminium finish, as in the photo below. So, as I found this design useful I thought I’d post about it so you can make your own: click here to head over to Thingiverse to download the files for 3D printing, as well as the OpenSCAD file for customisation.

A painted end cap in a 2020 frame
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Mounting a GoPro camera on a CNC machine

Sometimes it’s nice to make a video, even a timelapse one, of a project coming to fruition on a CNC machine. Maybe just as a keepsake, or to share, or even to make some educational Maker instructions. So being able to add a GoPro camera, or other camera that uses GoPro mounts, is something you may want. I did anyway, so the project shown above is a simple 3D printed mount that clips onto a 20mm-extrusion on the front frame of my CNC, which can be positioned right in-line with the work-bed centre.

It’s a very simple 3D printing project that doesn’t even need any support material, so shouldn’t be a challenge if you have access to a 3D printer. The files you can download from Thingiverse by clicking here, which include the OpenSCAD file in case you need to customise or adjust it. Once made you use it to fix on a sticky mount base like in the photo, for your camera arm to fit onto. And below is a photo of my GoPro session mounted on my CNC so you can get a better idea of how it works.

A GoPro camera mounted to a CNC frame

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Clip for 20mm extruded section frame

20mm square extruded aluminium section is commonly used for cheap CNC routers, especially for kit versions. So I designed this very simple 3D printed part that clips over three edges of the section. I did that for two reasons, the first being that I wanted to use one with two of my frame-end feet 3D prints (click here to read more) to make a stable tri-point support to reduce vibrations when routing. Secondly though, it’s just a useful thing to have to glue to anything I want to fix onto the frame while still being able to remove it later (e.g. bit holders or cable tie down pads). If you’d like to 3D print your own, just click here to get the STL files on Thingiverse.

A 3D model of the frame clip

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Support foot for 20mm extruded section

Many cheap CNC routers are based on 20mm square extruded aluminium frames, with slots and a hole running along them to attach fixtures. Often the four pieces of the frame at the bottom lie directly on the underlying surface, with no supports at the corners. That can be a problem as routing can cause a fair bit of vibration that can be transmitted straight into your work surface. If left unchecked, that can lead to annoying noise as the work surface and adjoined walls and floors vibrate with it. So, I designed this simple foot that can be slotted into the end of a 20mm extrusion that lifts it off the surface below, and which you can also use to add a small rubber or felt pad, further reducing noise and vibration. To get the STL files for 3D printing just click here.

A 3D model image of the foot

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