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  1. #1
    Join Date
    Oct 2009
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    829

    A Desktop CNC by David A

    Hello everybody,

    This is my build thread for a desktop CNC. It features rotating ball nut drives throughout and is designed to incorporate coolant and vacuum cutting.

    Mechanical design goal was to maximize planar loads, thus I am calling it PLANAR.

    Enjoy.

  2. #2
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    Re: A Desktop CNC by David A

    Starting point is the pan with a T-slot table.
    It is watertight and can hold about two gallons of coolant and has vacuum channels built-in.

    Click image for larger version. 

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  3. #3
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    Re: A Desktop CNC by David A

    The pan has six rows of bolts for stringers.

    Click image for larger version. 

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  4. #4
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    Re: A Desktop CNC by David A

    Installing first outside stringer below the pan.

    Click image for larger version. 

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  5. #5
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    Re: A Desktop CNC by David A

    Stringer pushed through.

    Click image for larger version. 

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  6. #6
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    Re: A Desktop CNC by David A

    Installing gauge on stringer.

    Click image for larger version. 

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  7. #7
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    Re: A Desktop CNC by David A

    Line up gauge with the end of stringer and tighten down.

    Click image for larger version. 

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  8. #8
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    Re: A Desktop CNC by David A

    Push stringer with the gauge until it touches the pan.

    Attachment 504828

  9. #9
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    829

    Re: A Desktop CNC by David A

    First stringer is installed.

    To install stringers under the table, loosen one row of bolts with the T-nuts.

    Attachment 504838

  10. #10
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    Oct 2009
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    829

    Re: A Desktop CNC by David A

    Inside stringer pushed under the pan.

    Click image for larger version. 

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ID:	504840

  11. #11
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    829

    Re: A Desktop CNC by David A

    Again, use gauge to push the stringer into correct location and tighten back the bolts.

    Click image for larger version. 

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  12. #12
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    Re: A Desktop CNC by David A

    All stringers are attached under the pan

    Click image for larger version. 

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  13. #13
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    Re: A Desktop CNC by David A

    Next up are the uprights. A pair of side plates and one upright profile.

    Attachment 504972

  14. #14
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    Oct 2009
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    Re: A Desktop CNC by David A

    And the installation jig.

    Click image for larger version. 

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  15. #15
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    Re: A Desktop CNC by David A

    Install side plates on the stringer.

    Click image for larger version. 

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  16. #16
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    829

    Re: A Desktop CNC by David A

    Push the jig under the side plates until it touches the stringer.

    Attachment 504978

  17. #17
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    Re: A Desktop CNC by David A

    Jig brings the side plates to the same height and aligns them with the front face of the stringer.

    Click image for larger version. 

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  18. #18
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    Re: A Desktop CNC by David A

    The upright profile has a notch at the bottom.

    Click image for larger version. 

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ID:	504994

  19. #19
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    829

    Re: A Desktop CNC by David A

    Slide the profile down between the side plates with the notch facing toward the pan.
    (Front side plate omitted for clarification.)

    Attachment 504996

    Attachment 504998

  20. #20
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    Oct 2009
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    829

    Re: A Desktop CNC by David A

    Install brackets on both sides of the upright.

    Click image for larger version. 

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