Welcome to Our Community

Some features disabled for guests. Register Today.

The Growler

Discussion in 'CNC Mills/Routers' started by Scott Martinez, Feb 13, 2019 at 2:52 PM.

  1. Scott Martinez

    Scott Martinez Well-Known
    Builder

    Joined:
    Nov 13, 2014
    Messages:
    5
    Likes Received:
    5
    Scott Martinez published a new build:

    Read more about this build...
     
  2. gta18

    gta18 Well-Known
    Builder

    Joined:
    Jul 20, 2016
    Messages:
    26
    Likes Received:
    1
    Hey those are monstrous motors! Been looking for servomotors that'll replace my nema 23's on my 1500x1500 build.

    Currently I have 2505 ballscrews that I think I oversized. Now I can only run the gantry maxed out without load at 3800mm/min, once Im cutting lets say 3/4 plywood, I can only go about 2400 without losing steps.

    Which motors did you go with? Do you mind posting the part numbers?

    Thanks!
     
  3. Scott Martinez

    Scott Martinez Well-Known
    Builder

    Joined:
    Nov 13, 2014
    Messages:
    5
    Likes Received:
    5
    Not at all... I will upload a BOM once I get it finished. These are the motors that I used:

    X axis: CPM-SDSK-3411S-RLS
    Y axis: CPM-SDSK-3432P-RLS (x2)
    Z Axis: CPM-SDSK-2331S-RLS

    They all have a top speed of about 2400 RPM. The screws are 5mm lead which is a theoretical top speed of 12,000 mm/min.

    -Scott
     
  4. gta18

    gta18 Well-Known
    Builder

    Joined:
    Jul 20, 2016
    Messages:
    26
    Likes Received:
    1
    Cool thanks! I can't wait to see your machine running!

    I haven't seen anyone use these motors.
     
  5. Project Hopeless

    Builder

    Joined:
    Jan 25, 2019
    Messages:
    20
    Likes Received:
    0
    Scott,

    On your gantry/beam the linear bearings, are they threaded directly into the aluminum extrusion? What extrusion profile are you suing to support the bearings?
     
  6. Scott Martinez

    Scott Martinez Well-Known
    Builder

    Joined:
    Nov 13, 2014
    Messages:
    5
    Likes Received:
    5
    Yes, the rails are bolted directly to the 80/20 extrusion. The profile is part number 40-4080. I'll be adding the BOM soon, which has all the part numbers.

    -Scott
     
  7. TurfnSurf

    TurfnSurf Well-Known
    Builder

    Joined:
    Jan 6, 2018
    Messages:
    29
    Likes Received:
    15
    Wood couplings for the win?
     
  8. Scott Martinez

    Scott Martinez Well-Known
    Builder

    Joined:
    Nov 13, 2014
    Messages:
    5
    Likes Received:
    5
    Wood couplings? No, the couplings are definitely not made of wood. :thumbsup:

    IMG_8572.JPG
     
  9. TurfnSurf

    TurfnSurf Well-Known
    Builder

    Joined:
    Jan 6, 2018
    Messages:
    29
    Likes Received:
    15
    Perhaps my choice of language is poor - connectors, connecting the ballscrew bearing blocks to the aluminum channels.

    plywood connector.png vs plywood base.png
     
  10. Scott Martinez

    Scott Martinez Well-Known
    Builder

    Joined:
    Nov 13, 2014
    Messages:
    5
    Likes Received:
    5
    Ah yes, I see what you mean. When I was first beginning to assemble the machine i thought "I'll make these parts out of wood for now, then replace them with aluminum parts after I prove out the design.". I may still do that, but only if the wood parts fail or if I find a good reason to. If I find that the bearing block is moving, that would be a good reason.
     
  11. TurfnSurf

    TurfnSurf Well-Known
    Builder

    Joined:
    Jan 6, 2018
    Messages:
    29
    Likes Received:
    15
    At least in my application, I find that more of the movement comes from the poor quality chinese bearing blocks than the connection itself. I'm sure if I needed more torque, that I couldn't get away with wood. Seemed kind of funny (in a good way) to me for some reason when I saw your use of wood components. Sounds like a good plan, replace with aluminum at your leisure. Will be neat to see it in action, keep us posted! (now if only I remembered how to "follow" a project on this website...hmm)
     
    #11 TurfnSurf, Feb 17, 2019 at 3:16 PM
    Last edited: Feb 17, 2019 at 3:22 PM

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice