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Thread: big budget cnc

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  1. #1
    Hello

    I am peter 30 from belguim.
    first of all sorry about the bad english i don't typ it a lot.

    I am thinking of building a cnc and i hope you can help me with the design.

    The idea i have is a machine of about 3000x 1600.
    Why this big ? because i have a small company and i make kitchens ,dressings,TV cabinets etc.
    this way i can lay down a sheet of MDF of melamine and cut the pieces .

    But the thing thats special about the machine is the next thing:
    i want the gantry to be 3000 mm, so basicly a big gantry and smaller X axes then normal.
    i was thinking for the gantry 160 mm high and 80 mm deep.
    is this enough or do i need to make it bigger so it do's not flex?

    Instead of linaire rails i was thinking a strip of steel or alu and then ball bearing rolling on the alu or steel rail.
    the reason why is simple.
    I want to start with a budget machine and later in the future upgrade it with better linaire rails like hiwin etc but for know i don't have the money to spend on expensive linaire rails.
    for now i will use a bosch router but also in the future a spindle.

    For the drive i was thinking rack&pinion module 1 is this enough or do i need to use 1.5 or 2?
    the motors and R&P will be mounted on the rails on top.

    i was thinking to use these motors.
    Nema 23 stepping motor 57BYGH627

    is this strong enough or not?


    i made some drawings in sketchup.

    Sorry for the many questions but i just want to be sure before i start building.
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