Tim Lebacq
May 2, 2018 · 3 min read

An overview of the construction and use of a soundproof CNC Mill enclosure, or How I Learned To Stop Worrying and Love the Proxxon MF70

Recycled enclosure salvaged from a MXL V69M microphone power supply — Vertical door lift & locking mechanism (manual for now)
Raspberry Pi and Arduino Uno + Grbl shield inside the MXL PS-69 case (after some dremel action)
Led lighting adjusting to the door state (white/blue closed, blinking red opened)


The Proxxon MF70 is a tabletop 3-axis micro mill. It’s also a pretty loud machine, which makes applications in “urban” environments difficult and the possibility of noise complaints rather high. Hence, the plan…

  • a soundproof, or as proof as it gets, box
  • CNC conversion of the mill (3 nema17 steppermotors and arduino grbl board)
  • remote control over the network with cncjs running on a Raspberry Pi
  • visual feedback with the ledstrip (machine state, door state, …)
  • camera feed
  • laser marker

The Beginning

Getting some wood, taking dimensions, PU foam hell…

Learning as we go… Plato would have some nice remarks about the concept.

Resoldering the RGB controller for the ledstrip, so it can be controlled from the Raspberry Pi (BCM 17, 27, 22 & Ground). The reed-switch at the door is connected directly to BCM 23 & Ground (the magnet is embedded in the top of the door). And a salvaged laser… could come in handy later on.

The Sound of Silence

With little to no experience in soundproofing anything, I decided to use my ears… Foam, padded walls and uneven surfaces seem to do “a” trick.

Construction & padding of the front door — Inside padding with final led layout — Close-up of the front double window.

In addition: a primitive, but effective locking mechanism…

Next Up

Some motor action.

Stay tuned…

Partial Proxxon MF70 inside the rough build.


My first word was “papegaai”

Tim Lebacq

Written by

My first word was “papegaai”. Design & front-end development. Taking apart and putting it back together… or the other way around.



My first word was “papegaai”