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  1. #1
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    soundproofed shed for cnc router

    I've seen many ideas on how to build a soundproof enclosure for desktop cnc routers, but hardly anything about small, yet highly effective workshop rooms for working with loud equipment.
    While an enclosure would do the job, I think it takes away from some of the practical aspects of being close to the machine and sometimes actually managing the work pieces as they are being cut. In my case, I cut many small nested pieces and need to hold the pieces down with a foam tipped stick to make sure that the tool does not push them out. I have tried tabs and do use onion skin, but I still need to keep a watch on them while on the final onion skin cut. And a few times, I've had to deal with real time emergencies, such as the tool digging into the work mysteriously.
    Thus my need to think about a small shed that soundproofed. It will be in the garage, the shed design would be more like a room. What most sound studios don't show is the need to have dust suction as well as good intake and out take baffles to deal with air flow without compromising sound proofing.
    As with all projects, it's always better to take someone else's design rather than doing it from scratch. But is a music sound room what I am looking for, or just applying the basic soundproofing principles for, let's say, generators, be more appropriate?



    Could use some ideas.
    tony

  2. #2

    Re: soundproofed shed for cnc router

    The goal in a music room is to eliminate all stray sounds, the goal with a generator is to just quiet it down to a reasonable sound level. So I would say the generator soundproofing would be what you want. Building a shed and insulating the walls with common fiberglass insulation and sheeting with sound deadening board would probably get you what you want. A closed cell ''foam rubber'' like material (egg crate mattress cover) would work for insulation also as long as it's covered with something (tarp material?) because it will pick up sawdust like crazy. We used the closed cell foam method to go on the inside of punch press enclosures to quiet them down. My router is in an insulated shop and once the doors are shut, it's quiet outside. Inside, you have to wear hearing protection.
    Jim Dawson
    Sandy, Oregon, USA

  3. #3
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    Re: soundproofed shed for cnc router

    Quote Originally Posted by greenene View Post
    But is a music sound room what I am looking for, or just applying the basic soundproofing principles for, let's say, generators, be more appropriate?

    Could use some ideas.
    tony
    Just the basic soundproofing......

    All of the multi-million dollar yachts use Loaded Mass Vinyl Insulation to keep the nasties at bay. Pricey, but fabulous stuff.

    Question is, can you afford a multi-million dollar shed ?

    SOUNDOWN COMPOSITE INSULATION VINYL/FOAM, SOUNDOWN CORP IVF1005MNSFT12

    I'd be tempted to try my own variety of components to simulate it, if for example I was going to fill stud spaces with something. I'd put up an inch of regular fiberglass insulation, a layer of rubber roof skin, another 1" layer of insulation (maybe the blue jeans stuff), a pass of reflectix, another rubber roof skin and so on. Certainly do not relay on a wall full of pink foam to suppress noise because it tends to act as a sounding board.

    Build the shed with 2x6 walls for better results.

    I'd worry about the air handling noise once there was an adequate building in place. One way to deal with that is to exit any air as high up via a stack as you can.
    Chris L

  4. #4
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    Re: soundproofed shed for cnc router

    Might be a lot cheaper and less trouble to get a quieter spindle/router or build an enclosure?

  5. #5
    Community Moderator ger21's Avatar
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    Re: soundproofed shed for cnc router

    Might be a lot cheaper and less trouble to get a quieter spindle/router or build an enclosure?
    He is building an enclosure. Just one he can fit into.

    Depending on what he is doing, cutting noise can be much louder than any router fan noise, even with a near silent spindle.
    Gerry

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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  6. #6
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    Re: soundproofed shed for cnc router

    Sound management is an art/science that frankly benefits from experience. The little bit I've done involves controlling radiated and conducted noise.

    Conducted noise can be thought of as any material that can transmit vibrations from the machine and in doing so radiate noise from the induced vibrations. For example a machine sitting on a wooden floor can cause that floor to Vibrate and thus radiate noise. For these sorts of issues, isolation materials are made to dampen the transmission of that noise. Any of the catalog companies serving the machining or manufacturing industries will have various types of isolation materials for machine feet, electrical and air conduits and so forth.

    For radiated noise you have all sorts of issues, even the materials the ceiling is made of can impact how noise bounces around. While this isn't the direction you want to go a machine enclosure is the best place to start to mitigate the noise it produces. It is sort of like handling the generation of electrical noise in a control cabinet, it is far easier to deal with the noise at the source than it is to address it after in leaves the device creating the noise.

    Now that being said if you want to build a room that noise wont leave you have to be willing to invest in a bit of expense to do so. In a nut shell you need walls and ceilings that don't vibrate and thus allow noise to migrate out of the room. Different frequencies will transmit though materials differently but I might suggest concrete block as a cheap solution that can moderate a good portion of the sound coming from a router.

  7. #7
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    Re: soundproofed shed for cnc router

    I did manage decent sound proofing with just a good R value of typical insulation for my shop. The only machine you can hear running in the shop with the doors closed is the compressor. It will soon be outside with a purpose built small building to house it.
    I intend to use Rock wool for that job.
    It works better than typical fiberglass or foam panel insulation.
    Lee

  8. #8
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    Re: soundproofed shed for cnc router

    One thing to consider is that sound proof rooms suck when you yell help! Just something that came to mind for other reasons.

  9. #9
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    Re: soundproofed shed for cnc router

    Quote Originally Posted by wizard View Post
    One thing to consider is that sound proof rooms suck when you yell help! Just something that came to mind for other reasons.
    good point.
    tony

  10. #10
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    Re: soundproofed shed for cnc router

    Homasote, or Roxul - stone wool... Glue it to the framing, don't use nails.

  11. #11
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    Re: soundproofed shed for cnc router

    For the onion skinning - use a larger tool to go down to onion skin level, then switch to a smaller tool to do the cutout.

  12. #12
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    Re: soundproofed shed for cnc router

    Quote Originally Posted by louieatienza View Post
    For the onion skinning - use a larger tool to go down to onion skin level, then switch to a smaller tool to do the cutout.
    Thanks, I'll try that.
    tony

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