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GRANITE 1.0

Discussion in 'CNC Mills/Routers' started by Michael.M, Sep 29, 2018.

  1. Michael.M

    Michael.M Master
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    Michael.M published a new build:

    Read more about this build...
     
  2. GrayUK

    GrayUK Openbuilds Team Elder
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    That's a serious looking machine you've got there!! :thumbsup::thumbsup:
     
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  3. Michael.M

    Michael.M Master
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    Thanks Gray!
     
  4. GrayUK

    GrayUK Openbuilds Team Elder
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    What power is your Spindle.
    My 1.5Kw came the other day, and although you know it is going to be heavy, it really is HEAVY. :jawdrop: 11lbs/800grams!!
    Still comes as a shock. :)
     
  5. Michael.M

    Michael.M Master
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    Mine is only 800w. You actually got me curious how much it weighs. I threw it on the scale. 6lb 6oz 20180929_160511.jpg
     
  6. Michael.M

    Michael.M Master
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    Is yours 65mm or 80mm diameter?
     
  7. Michael.M

    Michael.M Master
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    I would actually like to have a 1.5kw spindle. I have stalled this .8kw when accidentally taking too deep of cuts
     
  8. Andreas Bockert

    Andreas Bockert Veteran
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    Are those .5” plates?
     
  9. nickstomp

    nickstomp Well-Known
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    Is a really nice machine

    Did you have problem fixing the linear rails to the extrusion?

    I was thinking of purchasing a c-beam but I have a couple of hiwin rails that I was thinking to put in...
     
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  10. Michael.M

    Michael.M Master
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    Yeah they are .5"
     
  11. Michael.M

    Michael.M Master
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    No problem at all. They are 15mm rails for the Z + X axes and 20mm rails on the Y axes. The 15mm rails use M4 t-nuts and the 20mm use M5 t-nuts.The extrusions are based on 20mm profile so you go buy M4 & M5 2020 T-nuts.
     
  12. NeeqOne

    NeeqOne Veteran
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    Nice looking machine.
     
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  13. Michael.M

    Michael.M Master
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    Thanks buddy. I've been working on it for a really long time and I'm happy to share it finally.
     
  14. GrayUK

    GrayUK Openbuilds Team Elder
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    It's an 80mm water cooled spindle with a matched VFD, both are from HUANYANG CNC Motor Factory Direct Sales
    SDC14931.JPG SDC14918.JPG SDC14926.JPG
     
  15. GrayUK

    GrayUK Openbuilds Team Elder
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    Those brackets you have holding your spindle? Did you make them yourself, or did you buy them somewhere.
    I ask because, like yourself, I want to put two thinner brackets like yours on my spindle, and I can only see the wide 80mm brackets available.
     
  16. Michael.M

    Michael.M Master
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    The spindle mount is actually something I bought from Chris (Blue Ox) that was used on my Sphinx. I designed my new Z axis to be compatible with this mount.

    Designed to Order Router/Spindle Mount for Almost All Routers/Spindles and CNCs | eBay
     
  17. GrayUK

    GrayUK Openbuilds Team Elder
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    Nice piece of work as usual from Chris, just too much money for what it is, plus shipping pushes it over the $100 mark. :(
    I'll make do with one from China for now and cut one myself layer. :)
     
  18. Michael.M

    Michael.M Master
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    I can take some measurements of the mount if you're ever interested. You could the adjust to suit your 80mm spindle. It's a nice design. I actually designed my new Z axis to retain the mount. 15383142792362087913671012696035.jpg
     
  19. Michael.M

    Michael.M Master
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  20. NeeqOne

    NeeqOne Veteran
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    I hope you will upload the CAD files for the plates and the BOM when the build is completed.
     
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  21. Michael.M

    Michael.M Master
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    Yeah I will. I actually designed the entire machine in SketchUp before I started the build. I had to make some adjustments along the way so I want to make sure all those adjustments are updated in the design files.
     
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  22. joe williams

    joe williams Veteran
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    Love those thick plates!
     
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  23. Michael.M

    Michael.M Master
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    Hey thanks Joe. It was necessary for this machine as most of the plates have features or pockets on both sides of the plates.
     
  24. joe williams

    joe williams Veteran
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    Did you cut those 1/2" plates with that 800 watt spindle? How many passes did it take to cut one?
     
  25. DA_Spec

    DA_Spec Well-Known
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    Great work looks like a nicely design machine
     
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  26. Michael.M

    Michael.M Master
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    Thank you!
     
  27. Michael.M

    Michael.M Master
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    Yeah I did cut them with this spindle. I think my depth of cut was around .4mm. The spindle has enough power but the problem I had was chip clearing. I had an air blast nozzle but really needed 2 of them because a single nozzle can't reach every angle especially once you get really deep. It took multiple weekends to complete the plates. With a light weight machine, the strategy you want to use is high feed rate with shallow depth of cut but you don't want it so shallow that you're making dust instead of chips.
     
    #27 Michael.M, Sep 30, 2018
    Last edited: Sep 30, 2018
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  28. Michael.M

    Michael.M Master
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    As I cut the 1/2" plates, lots of chips were piling up on the Sphinx. It was a huge mess.
     
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  29. Tracy Ranson

    Tracy Ranson Veteran
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    This
     
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  30. Michael.M

    Michael.M Master
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    Haha I've seen similar comments here and there. I think the OpenBuilds system is a great for a first machine. I really pushed my Sphinx to the limits with these 1/2" plates and probably wouldn't have had any issues if I used a dust shoe combined with an air blast nozzle. The only plates I cut with mini mill were the X axis plates. You can them blued and scribed in the build pictures. My Sphinx was out of order by this time only because the serious buildup of chips damaged some of the wheels. This was completely my fault for not evacuating them properly.
     
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