David A's New 2x3 Bench Top CNC - Page 4


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Thread: David A's New 2x3 Bench Top CNC

  1. #37
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    Default Re: David A's New 2x3 Bench Top CNC

    Install the remaining two pairs of ball bushings and pillow blocks as on the lower plate:
    David A's New 2x3 Bench Top CNC-a13-img_7370-jpg

    David A's New 2x3 Bench Top CNC-a14-img_7373-jpg

    All installed:
    David A's New 2x3 Bench Top CNC-a15-img_7372-jpg

    Front view:
    David A's New 2x3 Bench Top CNC-a16-img_7376-jpg

    Back view:
    David A's New 2x3 Bench Top CNC-a17-img_7377-jpg



  2. #38
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    Default Re: David A's New 2x3 Bench Top CNC

    It sure looks nice but the side rails are very high and not very wide. I think your going to have flexing and twist when your cutting. Most builders use 3 inch or 4 inch square extrusions or metal for the side rails or Y axis. Look at some of the commercial builds you will see what I mean. Maybe all your going to use is a small hand router for spindle, if so you will be ok.

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4


  3. #39
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    Default Re: David A's New 2x3 Bench Top CNC

    Just for demonstration, this is where the servo spacer will be installed:
    David A's New 2x3 Bench Top CNC-a18-img_7378-jpg

    And the servo, a lower power Teknic CPM-SDSK-2321P-RQN:
    David A's New 2x3 Bench Top CNC-a19-img_7380-jpg



  4. #40
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    Default Re: David A's New 2x3 Bench Top CNC

    Quote Originally Posted by wmgeorge View Post
    side rails are very high and not very wide. I think your going to have flexing and twist when your cutting.
    Hi wmgeorge, do you mean the machine frame's side rails or the x-carriage side plates?

    The spindle is the standard Chinese 80MM 2.2kW spindle.



  5. #41
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    Default Re: David A's New 2x3 Bench Top CNC

    Assembling the X-Carriage:

    Install one side plate to the lower plate using the standard 8MM screws for the pillow blocks:
    David A's New 2x3 Bench Top CNC-a20-img_16458-jpg

    And then the other side plate:
    David A's New 2x3 Bench Top CNC-a21-img_6459-jpg

    And finish the frame with the lower plate:
    David A's New 2x3 Bench Top CNC-a23-img_6460-jpg

    Side view:
    David A's New 2x3 Bench Top CNC-a24-img_6461-jpg

    And for demonstration, the X-brace on the back:
    David A's New 2x3 Bench Top CNC-a28-img_6463-jpg



    You are welcome to utilize any parts of the design for your personal use.
    Please contact me for commercial applications.


    Last edited by davida1234; 02-24-2019 at 08:34 PM.


  6. #42
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    Default Re: David A's New 2x3 Bench Top CNC

    With the X-Carriage assembled, the Z-Slide can be inserted:
    David A's New 2x3 Bench Top CNC-a29-img_6468-jpg

    Back views:
    David A's New 2x3 Bench Top CNC-a30-img_6477-jpg

    David A's New 2x3 Bench Top CNC-a31-img_6478-jpg



    You are welcome to utilize any parts of the design for your personal use.
    Please contact me for commercial applications.


    Last edited by davida1234; 02-24-2019 at 08:35 PM.


  7. #43
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    Default Re: David A's New 2x3 Bench Top CNC

    Quote Originally Posted by davida1234 View Post
    Hi wmgeorge, do you mean the machine frame's side rails or the x-carriage side plates?

    The spindle is the standard Chinese 80MM 2.2kW spindle.
    Your side rails with the linear rails on for the Y. They are very high off the frame and not that wide. Most machines have 3 or 4 inch wide rails and are much lower as this one. http://www.cncrouterparts.com/images...4_Base_800.jpg

    My Saturn 2 from FLA has 3 inch square steel welded.

    Or this one from Camaster https://www.camaster.com/wp-content/.../Stinger-I.jpg

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4


  8. #44
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    Default Re: David A's New 2x3 Bench Top CNC

    Thanks for the input. The Saturn is one of my all time favorite designs and, admittedly, was a starting point for my design. I did the side rails with 3030s first and still have them. But the machine being a test mule, also built the thinner ones with 1530s, thinking that the 3030 looked so massive. Want to explore if the thinner frame will support the side loads. If I get any flexing or twisting, I will revert to the 3030 frames.



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

    I would go back to the 30x30 now because once you get it running it will be so much fun you will not want to redo then, I have cut and routed some 1/2 and 3/4 MDF and besides being dirty its tough but it carves so nice. I have done 2 inch thick walnut live edge slabs and it takes all the Hp I have to get it turned into a nice planed finish. I have a decent dust collector and would not cut without it with the MDF.

    The rest of the machine looks very nice!

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4


  10. #46
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    Default Re: David A's New 2x3 Bench Top CNC

    Just trying it out (with no oil yet in the ball bushings):





  11. #47
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    Default Re: David A's New 2x3 Bench Top CNC

    wmgeorge, thank you for your encouragement. The machine is already 3/4 built and I built it for testing. The thin side walls are built with a shear panel inside which is permanently attached with ss anchors and FRP in the channels. I want to particularly test how they will perform as it will reduce the width by 3".

    I will need all the help I can get from you and everybody else with the electrical and setup because that's where I am pretty clueless.



  12. #48
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    Default Re: David A's New 2x3 Bench Top CNC

    With the X-Axis and Z-Slide finished, it's time to put that assembly on the gantry!

    Just move the setup over the gantry linear rails:
    David A's New 2x3 Bench Top CNC-b1-img_7403-jpg

    Attach loosely onto the top rail blocks:
    David A's New 2x3 Bench Top CNC-b2-img_7407-jpg

    Install the proximity sensor. There is provision for another sensor if needed:
    David A's New 2x3 Bench Top CNC-b3-img_7420-jpg

    Attach the lower plate to bottom rail blocks as well.

    X-Carriage and Z-Slide is on the gantry!
    David A's New 2x3 Bench Top CNC-b4-img_6706-jpg

    Last edited by davida1234; 02-24-2019 at 08:36 PM.


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