Welcome to Our Community

Some features disabled for guests. Register Today.

Best way to do...

Discussion in 'CNC Mills/Routers' started by alex-cnc, Jun 18, 2017.

  1. alex-cnc

    alex-cnc New

    Jun 18, 2017
    Likes Received:
    Hi All,

    I am a newbie when it comes to the CNC milling but have been keen to give it a go for a while but needed worth while project to do, so now that I have found a project (wife has approved), I am now ready to go shopping but not 100% sure on what parts to buy for the work load.

    The best way for me to describe the project is that I have large blocks of clay that I need to mill but I can not drill top down like a normal cnc machine - need to go side on.

    Attached are a few images of my mock up machine.

    Requirements to mill:
    900wide ( left - right - shown as green )
    500hight ( up - down - shown as blue )
    900depth (forward back- shown as red)
    The grey is the floor supports

    things that concern me:
    1) Is this the best way to do something like this?
    2) I should have read <insert here> first?
    3) weight of the drill (3kg) on blue ( and what size motor is required)
    4) on the blue do dual stepper motors (1 each side) work well or do they run into issues?
    5) There is a hole that would be milled all that way though but it gets small every 250mm (like a step down circle) which the drill head will fit inside
    6) can I do it for my budget of $1500USD
    7) If I also wanted an extra axis to between red and green to go 45deg each way from center.

    While a parts list would be great - I am more after the you should do/use A part because of B as I want to learn :)

    Thanks in advance.

    Attached Files:

  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Dec 20, 2013
    Likes Received:
    The only major issue I see comes from the 900mm depth requirement. To stick that far out with a 3kg spindle on the end will require a back span for the axis beam and another framework for support. This totally blows your $1500 allowance. With proper belting you can keep the 4 towers to 2 motors which is workable but all the required beams, plates, wheels, and lifting screws are pushing into the $2000(US) range.

    The 45┬░ angular requirement adds a whole 'nother level of complexity to the project and easily another $500 to $1000. While the mechanics are fairly simple, the additional axis turns the system into a 4-axis machine which pushes you beyond the realm of cheap boards and free software and that gets expensive real quick. (And I really can't offer much help in this area as in the three years I've been watching the forum, I don't recall anyone ever completing a 4-axis machine.)
  3. Joe Santarsiero

    Joe Santarsiero OB addict
    Staff Member Moderator Builder

    Oct 30, 2014
    Likes Received:
    I think this is a 3 axis tipped up on its side. Maybe tip an OX up and throw in some structural webs on the backside?

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