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Sphinx 55 on MGN12 linear rails

Discussion in 'CNC Mills/Routers' started by SORIN ILIESCU, Sep 2, 2019.

  1. SORIN ILIESCU

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    SORIN ILIESCU published a new build:

    Read more about this build...
     
  2. Corey Corbin

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    Ok sorry for the edit of my post, But I am interested in this setup. I have a sphinx half built and I would like the switch gears and follow your idea on the rails, So I have a couple of question. I would be interested in buying a set of your gantry plates would they be available from Mr laidlaw or a dxf file? And you used the standard end plates for the sphinx on the axis with 2 motors? And how is the setup with lead screw and the Anti backlash block? Was there a spacer? Thanks!
     
    #2 Corey Corbin, Sep 4, 2019
    Last edited: Sep 5, 2019
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  3. ballen

    ballen New
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    I am also super interested in this build! I would also like the dxf of the plates if you are willing. I am trying to figure out how/if I can fit ball screw into C beam or atleast T12 leadscrew. I have T8 on a workbee now and they seem flimsy.
     
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  4. HuguesP

    HuguesP New
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    My good, this machine is so sexy, i I had to do it again I would do mine like this.
    Do you think it could handle a 1.5kw spindle and mill Aluminium?
     
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  5. SORIN ILIESCU

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    to be honest, I can’t see why it should not being able to handle it. But in December I will give it a try
     
  6. SORIN ILIESCU

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    Chris designed and machined the plates for me, and I am sure that he will list the complete plates kit in his EBay store soon. As about the DXF files, you should talk with him about it. For the anti backlash nut/lead screw, I used a 3D printed spacer, using a STL file that Chris also provided.
     
  7. SORIN ILIESCU

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    I don’t have any DXF files, mate, I had the plates kit designed and machines by Chris Laidlaw
     
  8. Corey Corbin

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    Awesome! I was hoping that was the case. I'll keep a eye on his Ebay store. Thanks for sharing your build!
     
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  9. SORIN ILIESCU

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  10. SORIN ILIESCU

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  11. Chris Laidlaw

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    Also, they are 10% off (the fee Ebay charges me) if you buy directly from me... [email protected]
     
    sharmstr and SORIN ILIESCU like this.
  12. Andreas Bockert

    Andreas Bockert Well-Known
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    Chris does great work and a really friendly guy.

    Did you just screw the rails to the to the c beams? When I looked at doing something similar I seem to recall that base of the rails wasn’t much larger then the the gap of the c beam. (At the top of the chamfer if this makes sense)

    I also like the reversed z axis.
     
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  13. SORIN ILIESCU

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    Yes, the rails are mounted with M3 screws, 8 mm length and with M3 T-Nuts, straight on top of the C -Beam. To be honest I had no issues doing that, except for the fact that I needed in total 140 M3 8mm screws and 140 M3 T-Nuts. To roughly center the rails on the C-Beam I used 3D printed spacers found at MGN12 Alignment Block by snicker and later I fine tuned the position of the rails using a dial indicator and a magnetic base, something similar to this item https://www.amazon.de/Flexible-Magn...&s=gateway&sprefix=Dial+,aps,214&sr=8-20&th=1
     
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  14. SORIN ILIESCU

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    Chris is a .... sweetheart, and the idea to reverse the Z axis comes from him as well. Great person, excellent machinist and very inventive.
     
  15. Andreas Bockert

    Andreas Bockert Well-Known
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    Cool. My concern is that the top opening of the c beam is about 9mm and this only leaves about 1.5mm on each side for the rail to have contact with the c beam. Perhaps this is plenty enough for it to be strong, I’m not a mechanical engineer.

    I was considering milling plates to mount the rails to but it’s a lot of plates to mill and a lot of holes to tap.

    /Andreas
     
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  16. SORIN ILIESCU

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    I understand your point, but until now I got no signs of weakness from the linear rails assembly. I cutt through marine plywood at 4mm depth of cut, by mistake, and the machine didn’t complained at all.
    But there is always the option to go with MGN15, or even bigger, if you think that the MGN12 is not enough wide
     
  17. daveo

    daveo New
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    Hi
    I am also looking at this build but would like to extend it to 1000mm x 1000mm with the linear rail kit and the 1.5kw spindle,just wondering if the 8mm lead screws will take it?
     
  18. daveo

    daveo New
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    does any one have the parts list so i can work out the extrusion
    thanks dave
     
  19. MrGoodCat

    MrGoodCat New
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    this is an awesome build!

    I accidentally tripped and fell in a rabbit hole when looking to upgrade my c-beam machine x-axis. I am now planning on building a sphinx style machine and really like this linear rail setup. I am new to linear rails in general and am a bit overwhelmed by all the brands, sources, china knock-offs, etc.

    can anyone suggest an affordable/reputable source for these mgn12 rails and bearing blocks? seems like options range from $400 to $1000+ depending on brand alone. what brand do people use or suggest for hobby-esque cnc builds?

    also, do the bearing blocks seal well enough to keep dust out? I plan on cutting mainly wood with this cnc router. my current c-beam machine is a dust generator and when attempting to rig up a dust shoe I quickly learned the x-axis was flimsy, hence the trip down the rabbit hole...
     
  20. Giarc

    Giarc Master
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    A couple people have converted their workbees to linear rails with these from Amazon. They are 15 mm but 12 mm are available as well. I bought them recently because I plan to modify my custom build CNC router.
     
  21. Raul Arrabal

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    Nice work !!!, im really interested in make the same build, i just looking arround and i like too much, ¿dou you have the full part list?, ¿did you try to cut aluminium yet?
     

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