Welcome to Our Community

Unlock hidden features. Sign Up for Free Today!

C-Beam Machine - MyFirstCNC

Discussion in 'CNC Mills/Routers' started by Paul Stoller, Apr 1, 2016.

  1. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Paul Stoller published a new build:

    Read more about this build...
     
  2. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Resident Builder Builder

    Joined:
    Jun 28, 2013
    Messages:
    1,817
    Likes Received:
    919
    Great job so far @Paul Stoller The pictures you took are really nice with everything laid out neatly, it makes me want to build! :D
    Thank you for sharing. Keep up the good work :thumbsup:
    Mark
     
    Paul Stoller likes this.
  3. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Thanks Mark, I am grateful to have found a forum that is as active as this one for a place to learn. I had been looking various desktop CNC type machines for several years, and finally decided that my best route was to build one myself. I figured I would learn more and spend less, but it was finding the openbuilds site that finally convinced me to pull the trigger and start. Not only where the prices affordable once I saw how active the community I knew I had found the right place.
     
    GrayUK and Mark Carew like this.
  4. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Resident Builder Builder

    Joined:
    Jun 28, 2013
    Messages:
    1,817
    Likes Received:
    919
    We feel the same way about being here, it truly an honor to be around so many great Builders wanting to help one another learn and innovate, we love it!
    And this community is only going to get better as we grow together so the future is super exciting!
    Thank you again for taking the time to share your Build we hope you have blast learning CNC
     
    Paul Stoller likes this.
  5. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    I was taking a closer look at everything again today and when I turn the flex coupling to move the build plate back and forth I think I can see a small wobble in the lead screw. It may have gotten slightly bent during assembly. Will a slight wobble cause problems, or should I place an order for two lead screws when I order my parts for the X axis.
     
  6. EvanBruner

    EvanBruner Veteran
    Builder

    Joined:
    Mar 26, 2016
    Messages:
    69
    Likes Received:
    54
    It could be you put too much preload on it when you assembled. Id loosen the lock collar and see if it straightens out. It really shouldn't cause any issues though, maybe some noise at high speed. I'm not an expert but I think that would be a good place to start.
     
    Paul Stoller likes this.
  7. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Thank you for the suggestion, I will give that a try this evening to see if it makes any difference.
     
  8. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    I went ahead and readjusted the preload and it didn't seem to make much difference. On the other hand it does seem to be fairly slight. I went ahead and shot a video of it although it's so slight it's still hard to make out.



    Perhaps I'm just being a bit paranoid, I just want to make sure it won't be a problem with the performance of the machine later on.
     
  9. EvanBruner

    EvanBruner Veteran
    Builder

    Joined:
    Mar 26, 2016
    Messages:
    69
    Likes Received:
    54
    Doesn't look bad at all, much straighter than mine are in fact. I think it'll just cause some noise and may limit your top speed. I found that my leadscrews get crazy above 1500 mm/s due to the flex.

    I read a thread about stabilizing the lead screws by putting Teflon tape at the end of the leadscrew to tighten up the fit on the bearings and using blue locate to hold the bearing in the end plate race. Seems like it would be a good way to quiet the machine and get rid of some slop.
     
    Paul Stoller likes this.
  10. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Good to hear, I may have to try the loctite and thread tape a try as well.
     
  11. Julius

    Julius Veteran
    Builder

    Joined:
    Nov 13, 2015
    Messages:
    155
    Likes Received:
    40
    If you need some DRV8828 drivers, I'll sell all 5 of mine to you for... 12$? I swapped driver systems so I dont need them anymore. I also have a 80mm 12V fan with it.
     
    Paul Stoller likes this.
  12. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Thanks Julius, I appreciate the offer, since I plan on using the high torque NEMA 23's from the parts store I plan on getting the DQ542MA drivers, the pololu drivers just don't have quite enough power to adequately drive the HT NEMA23s. I'll be hooking up the external drivers to the protoneer hat.
     
  13. Julius

    Julius Veteran
    Builder

    Joined:
    Nov 13, 2015
    Messages:
    155
    Likes Received:
    40
    well in that case, you should look into the TB6600's instead.
     
  14. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    I had read a bit on the TB6600's and they were almost what I had decided to go with, but then I started reading about DSP based drivers (such as the DQ542MA's), and how they tend to give smoother and quieter operation than traditional drivers. I know the DQ542s are a bit more expensive, but I'm looking at reducing noise as much as possible as I'll be using my machine in an apartment. I'm actually building a sound dampening enclosure for the CNC as well.
     
  15. EvanBruner

    EvanBruner Veteran
    Builder

    Joined:
    Mar 26, 2016
    Messages:
    69
    Likes Received:
    54
    For what its worth, the motor noise will be completely inconsequential compared to the spindle / cutting noise. I have an enclosure as well and the motors are inaudible but the cutter sure isnt.
     
    Paul Stoller likes this.
  16. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Evan, Thank you for the info. I figured the router/cutting action would be the loudest component, but I figure every little bit helps. The enclosure design I'm working on will be made up of multiple layers with some sound absorbing material sandwitched between the plywood (along with an air gap). The front door will be made of a "box" with two layers of 1/4 inch plexi. The other option I'm considering adding, but not sure if it will be worth the expense is some mass loaded vinyl to help with the noise reduction. I'm hopeful to get the noise down to the point that I don't have the neighors after me and I can run the machine for hours without driving myself crazy.
     
    GrayUK likes this.
  17. Giarc

    Giarc Master
    Builder

    Joined:
    Jan 24, 2015
    Messages:
    251
    Likes Received:
    113
    The loudest part of my system is the shop vac. I can't hear anything over that.
     
  18. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Yeah they can be quite loud, I'm toying with the idea of taking the innards of an old vacuum cleaner and using that to integrate the vacuum into my enclosure. (the catch chamber would be external). If I end up adding an air compressor that will end up getting it's own enclosure.
     
  19. Julius

    Julius Veteran
    Builder

    Joined:
    Nov 13, 2015
    Messages:
    155
    Likes Received:
    40
    just an FYI, 2nd hand towels layered together are better at sound dampening then the foam, and a LOT cheaper.
     
    Paul Stoller likes this.
  20. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    That's a good thought, thank you, I had been thinking about using acoustic ceiling tiles as they have a decent noise reduction co-efficient of .55 (meaning they block about 55% of the sound energy that passes through them and are fairly inexpensive. But I'm certainly open to exploring other inexpensive materials. I'll have to test that out.
     
  21. Julius

    Julius Veteran
    Builder

    Joined:
    Nov 13, 2015
    Messages:
    155
    Likes Received:
    40
    theres a few vids on youtube about it if you want to get more proof of concept for it.
     
    Paul Stoller likes this.
  22. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    That's awesome, I appreciate the tip. From looking at some of the other sound proofing products that are out there it's possible the old towels could hit something at ~.85 noise reduction coefficient which would be a nice significant bump even from the acoustic tiles.
     
  23. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Julius,

    I took your advice to look up an example on youtube, it does seem to be a decent method. I thought I would share a link in case anyone else is curious about it.

    Thank you again.

     
    GrayUK likes this.
  24. Bad Sequel

    Bad Sequel Veteran
    Builder

    Joined:
    Aug 19, 2015
    Messages:
    67
    Likes Received:
    25
    Hey! Nice find that video.

    Towels to the rescue!
     
    Paul Stoller likes this.
  25. Paul Stoller

    Paul Stoller Veteran
    Builder

    Joined:
    Feb 28, 2016
    Messages:
    40
    Likes Received:
    35
    Here is a wiring diagram for the Pi hat I'm using.

    [​IMG]
     
    GrayUK and Moag like this.

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!