Welcome to Our Community

Unlock hidden features. Sign Up for Free Today!

500w AliExpress Spindle

Discussion in 'CNC Mills/Routers' started by MillMe, Mar 24, 2016.

  1. MillMe

    MillMe New
    Builder

    Joined:
    Mar 19, 2016
    Messages:
    5
    Likes Received:
    0
    Hello all,

    I will be buying a C-Beam this summer and I am looking at my spindle option in the meantime. I need something quiet (I will be using this in a dorm room next year) and I am looking at this chinese spindle on AliExpress:

    Aliexpress.com : Buy spindle motor 500W air cooled 0.5kw milling Motor +spindle speed power converter+&52mm clamp+13pcs er11 collet for DIY from Reliable cutter rotary suppliers on Guangzhou, HongYi Automation Co., Ltd. | Alibaba Group

    I am wondering if this is a good option or if I have any better quiet options for around this price ($100)?
     
  2. JustinTime

    JustinTime Master
    Builder

    Joined:
    Dec 18, 2013
    Messages:
    768
    Likes Received:
    152
    I think the only thing you could do to get the machine quiet is to build an enclosure around it with Styrofoam for sound damping. It's not a s complicated as it may sound and it works a charm.
     
    GrayUK likes this.
  3. MillMe

    MillMe New
    Builder

    Joined:
    Mar 19, 2016
    Messages:
    5
    Likes Received:
    0
    I am planning on enclosing it as well, for the noise but mostly to trap the wood/plastic dust (as I want to use this in a dorm room).

    This was a quick c-beam enclosure that I put together in Fusion 360:

    I am thinking about making the panels out of plexiglass and using a piece of tarp along the top contour to fully enclose it. Does anybody know of any better method? (I will also be very space limited so I want to keep the enclosure close to the overall c-beam footprint)
     
  4. GrayUK

    GrayUK Master
    Staff Member Moderator Builder

    Joined:
    May 5, 2014
    Messages:
    923
    Likes Received:
    214
    How about straight up at the back, with sound proofing on back and sides. Make a gentle curve to the front, and then mould a piece of plexi, with a hair drier or air gun, over a former to get a complete lifting front with a handle? :thumbsup:
     
  5. Metalguru

    Metalguru Master
    Builder

    Joined:
    Dec 29, 2015
    Messages:
    326
    Likes Received:
    168
    A simple square box made with MDF would be easy, cheap, and work like a charm. A tarp may keep the dust down but will do nothing for noise, and foam is only good for very high frequency noise. The denser the material, the better the sound dampening. The key to good noise damping is dense material, and sealing all air leaks from the enclosure. A little gap will let out a surprising amount of noise. Seal all corners with a good silicone sealer or use construction adhesive.

    A little weatherstripping around a front door and you are golden. Put a plexi window in the front and a light inside so you can see what's going on. Also, make sure to put the machine on a dense foam pad to absorb mechanical vibrations. If you are really paranoid, you could line the inside of the box with a dense foam rubber like good quality carpet underlay to absorb even more noise.

    Give it a coat of paint, and you could tell everyone it was an enclosure for your pet GRBL. :)

    As far as the spindle goes, a simple Bosch or Dewalt palm router will work, have more power, but probably be a bit noisier. You can likely get one on sale for well under $100. I saw a company on the web that had Bosch Colt variable speed factory reconditioned routers for $74.00. The c-beam kit comes with a Bosch mount.
     
    GrayUK likes this.
  6. Metalguru

    Metalguru Master
    Builder

    Joined:
    Dec 29, 2015
    Messages:
    326
    Likes Received:
    168
  7. MillMe

    MillMe New
    Builder

    Joined:
    Mar 19, 2016
    Messages:
    5
    Likes Received:
    0
    Excellent ideas! I will probably end up trying to loosely replicate a carvey. (I would consider a carvey except for the price and the apparently terrible 300w spindle)

    My only concern at this point is the noise! (The carvey is apparently VERY quiet) I won't have a shop vac on it so the spindle will be the loudest part of the system.

    The goal would be to have a conversation over the noise of the CNC machine, would I be able to do this with the bosch router and a decent enclosure?
    [​IMG]
     
  8. Metalguru

    Metalguru Master
    Builder

    Joined:
    Dec 29, 2015
    Messages:
    326
    Likes Received:
    168
    Millme:

    It's pretty hard to say quantitatively that one system will be quieter or louder than another. I have never heard the spindle motor you mentioned in your first post, so I can't really comment on whether the Bosch is louder or not. (does the manufacturer have any noise specs on the motor?) Perhaps someone else on the Forum has used both, and could offer a more informed opinion?

    I do know the Bosch, like all motors going 35000 RPM, is quite loud. I know that sound enclosures do make a heck of a difference. Go to a Jugo Juice or an Orange Julius or whatever you have in your area, most of them have acrylic enclosures over the Vitamix Blenders. They do make one heck of a difference when the cover is closed. A properly done sound enclosure should give 20dB or more of noise reduction, which is about what you get from a set of foam earplugs.

    Whether you can have a conversation over it or not is a subjective question I can't answer. MDF is cheap enough to "try it and see". Surely you know someone with a router, you can stick it into a box and see what kind of difference it makes. I know I have a Router Table in my shop, and I totally enclosed the bottom of it where the motor is located, and it made all the difference in the world. I can easily hold a conversation next to the machine, and I don't need to wear hearing protection when using it.

    I'd be more worried about waking up the neighbors in a dorm, than being able to hold a conversation. :)

    I do have a c-beam machine in my garage, and with the whine of the stepper motors, and the router, it is pretty loud. I definitely have to wear good hearing protection, but I also usually have a shop vac going at the same time. I might just have to look at making my own enclosure...

    I do like the design of the Carvey, that is a nice enclosure. You could do something similar where the top and the front all hinge up as one piece. It would take up quite a bit of room, though. You could put a Piano hinge at the back of the top, and another where the front and top join, to make the lid more compact.
     
  9. MillMe

    MillMe New
    Builder

    Joined:
    Mar 19, 2016
    Messages:
    5
    Likes Received:
    0
    Thank you for the information, I realize after reading it again that was a subjective and difficult question to quantify.

    Here is a video of a chinese 500w spindle in action (There are several versions I'm finding on ebay and aliexpress, I'm assuming they're all about the same):


    The routers are a good deal for the power but they are so loud (and higher pitched) compared to the 500w spindle.

    I will probably settle for a spindle similar to the one in the video as long as I can somewhat determine that I won't get poor accuracy due to shoddy construction like the 300w series spindles that inventables uses in the carvey:


    I think it would be easiest to go with a design like this with two thick plexiglass plates connected to cover the top and sloped front. I would use something like dynamat all over the inside (or at least bottom), and this coupled with the quieter spindle should be the ideal for me in a dorm room.
    Screen Shot 2016-03-27 at 22.19.46.png
     
  10. Metalguru

    Metalguru Master
    Builder

    Joined:
    Dec 29, 2015
    Messages:
    326
    Likes Received:
    168
    Yeah that video really turned me off to the cheap Chinese spindles. I'll take CE marked German Engineering every time. False economy to buy a cheap spindle and have to buy another one after a few hours of use.

    Routers are probably louder because they spin at 35000 rpm instead of 10-15000 for the spindles. Keep in mind that cooling will be an issue inside the closed box as well. Routers are pretty well air cooled.

    Now you are cooking with the box design. A bit bulky, but not bad. Keep in mind that 3/8" or 1/2" plexi is very expensive, you might want to stick with a wood top with a window or two of 1/4" plexi. Dyna Mat is a great idea.

    Happy routing.
     

Share This Page

  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Building needs!
  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provide resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop theirs!

    Donate to FairShare!