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The C-Beam Sphinx 1x1

Discussion in 'CNC Mills/Routers' started by John Christian Lien, Jan 17, 2017.

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  1. John Christian Lien

    John Christian Lien Well-Known
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    Currently building a C-Beam Sphinx with a total size of 1m x 1m. I am following Kyo's sphinx build to the letter except when it comes to the height of the y-axis side plates.

    I took the original y-axis side plate files from Kyo's "rev 2 folder" to a freelancer and had him scale them up a bit. So they are now
    229mm x 155mm. Since i was going with taller plates i feared it would become more flexible, so instead of 6.3mm aluminium i went with 6mm steel.

    As i write this the plates are being cut at a local shop. Will update with pictures as soon as i get them.

    I have included the Y-Axis Side Plate (dxf) file in this post, free to download, just in case you want to go the same route.

    The picture below is my goal, except i will use a watercooled cnc spindle with a VFD.
    [​IMG]
     

    Attached Files:

    Fredrik KJolner, snokid and Kyo like this.
  2. Giarc

    Giarc Master
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    Maybe I am looking at this wrong, but with the plates that high, and the bottom of your Z even with the underside of the X plates will your spindle's end mills be able to reach down to your spoil board? Or will you mount yours with the Z plate attached to the X plate with the Cbeam going up and down so it can reach lower? Of course it could be the camera angle throwing me off. The reason I point this out, is I had a similar issue in my build. I built everything so at the lowest Z position, my standard end mills would reach the top of my spoil board plus a couple millimeters. I was able to get a 3.75" workable Z depth this way. However, when I wanted to drill a series of holes for mounting things to the spoil board I had to purchase extra long end mills. They work fine for drilling holes, but I have found them to have to much flex for accurate cutting. When I do multiple passes to cut through thicker materials I can see the depth lines. With my standard length end mills I don't see the "layers."
     
  3. John Christian Lien

    John Christian Lien Well-Known
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    Hi!

    I didnt notice that until you pointed it out now. I think the easiest fix is to have a "long" cnc spindle like on the picture below instead of a router, so that if you need to adjust the height you can just adjust the position of the spindle, instead of the whole z-axis. However it depends on how far it is between the bit and the spoilerboard it is though. i wouldnt have mine as far up as shown on the picture above.

    [​IMG]
     
  4. Giarc

    Giarc Master
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    One thing I have done to help eliminate some of the lever effect is to add an additional spoil board for when I am cutting sheet goods and aluminum. This is a smaller spoilboard and i have several made from scrap. When I cut 2 inch foam for a project, I removed the extra layer. This also helps keep me from having to replace the full size spoil board.
     
  5. John Christian Lien

    John Christian Lien Well-Known
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    Getting there.. Prefitted the Y-Axis.

    213667702.jpg 213670701.jpg
     
    Kyo likes this.
  6. ChadRat6458

    ChadRat6458 Journeyman
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    What size spindle are you using?
     
  7. Kevon Ritter

    Kevon Ritter Master
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    The load isn't the weight of the spindle though. The load is the force as a result of cutting. None of which would be directly up or down unless you plan to plunge end mills.
     
  8. Nibar77

    Nibar77 New
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    Would you have a PDF file of the front plates, if not do you know who would...thanks
     
  9. John Christian Lien

    John Christian Lien Well-Known
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    2.2kw watercooled
     
  10. John Christian Lien

    John Christian Lien Well-Known
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    This machine is based of Kyo's machine and he have all the files free for download on his thread.. Im sure you can probably convert his files into a pdf. C-Beam cnc
     
  11. John Christian Lien

    John Christian Lien Well-Known
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    Still alot of work left.

    * Tidy up the wiring inside the cabinet
    * Add dragchains for outside wiring
    * Connect Z axis motor
    * Connect spindle wiring and cooling hoses
    * Add limit and homing switches
    * Spoilerboard
    * +++


     
    ChadRat6458 likes this.
  12. John Christian Lien

    John Christian Lien Well-Known
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    So i am getting there slowly, but steadily.. kind of lol.. Ordered the wrong cable drag chains. It fits 2 motor cables and the spindle cable, but not the two waterhoses for the watercooled spindle. So i have now ordered 4 new bigger ones, so i can splice 2 together to make them longer :) Spindle cable has arrived. Still waiting for 2 pcs. 2080 v-slots to act as supports and also need to order waterhoses.


    23795399_10154889677115614_5305766799474513504_n.jpg


    24059470_10154889677250614_3646048995452506819_o.jpg
     
  13. John Christian Lien

    John Christian Lien Well-Known
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    Next post will be when the 2080 supports have been installed, new dragchains with the 3 cables and waterhoses been mounted and everything connected to the electrical cabinet :)
     

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