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IndustryArena Forum > MetalWorking Machines > CNC "do-it-yourself" > Please critique my CNC machine
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  1. #1
    Member
    Join Date
    Mar 2021
    Posts
    29

    Please critique my CNC machine

    I decided to have bt-30 spindle but not clear on the motor

    AC- servo or induction motor. The induction motor seem heavy and I have 16 mm ball screw on the Z-axis

    The other thing do I need to sink the frame inside concrete to be able to mill mild steel with 8 mm tool

    I will appreciate any critiques

    Philip


    Edit video : obviously the x-axis solid bars are 30 mm in diameter, not 30 meters


    https://www.youtube.com/watch?v=zZ1cogS1Is4

  2. #2
    Member
    Join Date
    Apr 2004
    Posts
    5420

    Re: Please critique my CNC machine

    I doubt that suspending the spindle assembly on 4 unsupported rods will give you the rigidity you need to mill steel effectively, especially when it's in mid-span, as shown. Maybe if they really were 30 meters thick, though...
    Andrew Werby
    Website

  3. #3
    Registered
    Join Date
    Dec 2003
    Posts
    1026

    Re: Please critique my CNC machine

    Be honest! There is no doubt involved;not only will the unsupported rods move,the lack of bracing on the gantry endplates means they will join the dance too.

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