David A's New 2x3 Bench Top CNC


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    Default David A's New 2x3 Bench Top CNC

    Hello,

    This my build thread for a 2x3 desk top which I developed over the last few years. Hope you enjoy it!

    David A's New 2x3 Bench Top CNC-img_7252-jpg

    Similar Threads:
    Last edited by CNC-Titan; 02-18-2019 at 08:04 AM. Reason: testing


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    Default Re: David A's New 2x3 Bench Top CNC

    Side frames have shear panels with anchors and carbon fiber reinforced epoxy inside the extrusion slots. They are structurally rigid single pieces.

    David A's New 2x3 Bench Top CNC-img_1-5844-jpg

    Last edited by davida1234; 01-31-2019 at 10:25 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    All holes and access points required for assembly are pre-drilled.

    David A's New 2x3 Bench Top CNC-img_2-5918-jpg

    Last edited by davida1234; 01-31-2019 at 10:12 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    ASSEMBLY OF MACHINE FRAME:

    Last edited by davida1234; 01-31-2019 at 10:13 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    Attach braces to the 3030 cross beam:
    David A's New 2x3 Bench Top CNC-img_4-6562-jpg

    Front cross beam installed:
    David A's New 2x3 Bench Top CNC-img_7-5850-jpg

    Both cross beams installed:
    David A's New 2x3 Bench Top CNC-img_8-5853-jpg

    Last edited by davida1234; 01-31-2019 at 10:19 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    Main frame assembled:
    David A's New 2x3 Bench Top CNC-img_14-5856-jpg

    Last edited by davida1234; 01-31-2019 at 10:20 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    Feet for the machine are 1" HDPE pucks with pressed-in 1" bolts:
    David A's New 2x3 Bench Top CNC-img_10-6595-jpg

    They screw directly into the bottom of the extrusions:
    David A's New 2x3 Bench Top CNC-img_11-6596-jpg

    Feet installed:
    David A's New 2x3 Bench Top CNC-img_12-6599-jpg

    Attached Thumbnails Attached Thumbnails David A's New 2x3 Bench Top CNC-img_12-6599-jpg  
    Last edited by CNCfanatic; 02-12-2019 at 03:31 AM.


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    Default Re: David A's New 2x3 Bench Top CNC

    BED AND TABLE

    Bed is a 2x3 aluminum sheet and 1515 stringers. All holes for assembly are pre-machined:
    Attachment 411268

    Install stringers:
    Attachment 411270

    Various 1" HDPE parts will be attached to the bed sheet. Spread out an even coat of open gear grease to all the mating surfaces of the HDPE pieces. Make sure all mating surfaces are covered:
    Attachment 411272

    Attachment 411274

    Install the pieces, making sure grease is squeezed out a bit:
    Attachment 411276

    Attachment 411278

    Last edited by davida1234; 02-01-2019 at 09:26 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    Under side of machine bed with HDPE parts installed:
    David A's New 2x3 Bench Top CNC-img_10-6540-jpg

    David A's New 2x3 Bench Top CNC-img_13-6556-jpg

    Top of machine bed with the 1" HDPE table with clamp slots:
    David A's New 2x3 Bench Top CNC-img_7-6577-jpg

    Last edited by davida1234; 02-01-2019 at 09:26 PM.


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    Default Re: David A's New 2x3 Bench Top CNC

    Looking good. As with others of this design...how's the side load stiffness?



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    Default Re: David A's New 2x3 Bench Top CNC

    Thank you fretman_2.

    It feels stout so far. I think the epoxy embedment along the full perimeter of the shear plate makes the side panels quite twist resistant. There are three 3030 cross beams connecting the side panels with large corner brackets. One of them is not visible behind the gantry. See attached pic. So far I didn't see a need for them but larger flat brackets could be added to front and back if necessary.

    David A's New 2x3 Bench Top CNC-img_7261_b-jpg



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    Default Re: David A's New 2x3 Bench Top CNC

    With the main frame assembled, 20mm linear rails are installed:
    David A's New 2x3 Bench Top CNC-img_1-6431-jpg

    Pretty straight forward:
    David A's New 2x3 Bench Top CNC-img_5-6663-jpg

    David A's New 2x3 Bench Top CNC-img_6-6602-jpg



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