New Machine Build Large Epoxy granite VMC building - Page 6


Page 6 of 6 FirstFirst ... 3456
Results 101 to 107 of 107

Thread: Large Epoxy granite VMC building

  1. #101
    Member
    Join Date
    Aug 2013
    Posts
    188
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    Quote Originally Posted by CNCMachineplans View Post
    All good. You spoke about thermal dissipation and how alu was a better choice on your Facebook post so was just curious.

    Sent from my MI 8 using Tapatalk
    well not a better choice, I believe it's a close call. I spoke about that because some genious out there referred alu+EG not being a good idea due to thermal expansion differences. anyway I work with what I can get, in the head it just had to be Alu.
    lovers gonna love, haters gonna hate :P



  2. #102
    Member
    Join Date
    Jan 2008
    Location
    Australia
    Posts
    1173
    Downloads
    1
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    Kern uses epoxy granite with aluminium inserts for linear rails beds. They cool the aluminium and apparently use it due to good thermal conductivity.

    7xCNC.com - CNC info for the minilathe (7x10, 7x12, 7x14, 7x16)


  3. #103
    Member
    Join Date
    Jun 2013
    Location
    Australia
    Posts
    42
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    So what your saying is it's better too insert aluminium bars and have them milled for the linear rails than use steel. Just about to purchase supplies for mine


    Sent from my MI 8 using Tapatalk

    www.cncmachineplans.com


  4. #104
    Activation process immutef's Avatar
    Join Date
    Jul 2018
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    Quote Originally Posted by CNCMachineplans View Post
    So what your saying is it's better too insert aluminium bars and have them milled for the linear rails than use steel. Just about to purchase supplies for mine
    No, its not "better" because Kern does it. Kern uses aluminium because its easier to cool, so thermal expansion is less of an issue in their machines. The actively cool the aluminium, which is probably not doable for a DIY machine. For hobby/home/semi-professional use, steel is the better choice, since material properties are more similar to epoxy granite than aluminium.



  5. #105
    Member
    Join Date
    Aug 2013
    Posts
    188
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    Quote Originally Posted by immutef View Post
    No, its not "better" because Kern does it. Kern uses aluminium because its easier to cool, so thermal expansion is less of an issue in their machines. The actively cool the aluminium, which is probably not doable for a DIY machine. For hobby/home/semi-professional use, steel is the better choice, since material properties are more similar to epoxy granite than aluminium.
    exactly.

    however I don't even consider it a problem, I mean the amount of expansion I don't think it to be relevant at all, if it was an abrupt and wide temperature difference it might but in our case it's a low difference over long time and due to the aluminum great thermal condutivity I don't think it will really matter... maybe it does if you're chasing microns otherwise it's just kind of irrelevant I believe... for me I just use what I can get easier...



  6. #106
    Member SladicStroj's Avatar
    Join Date
    Jan 2020
    Posts
    8
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    Well that’s something worth of looking after and taking notes for further builds! I really like the column ribbed design which will definetly add towards the overall ridgidity. And it’s great to see someone finally added a few mm more to the base width and mounted Y rails as wide as possible to avoid unnecessary X bed overhanging.
    Truly, great build my friend!
    I’m sure all this attention to machine structure will greatly reflect the end machining results.

    By the way, the finish on column casting really looks great!
    And I like the way you planed for self-machining the fixture plate. Definitely the best way in my opinion.

    Few questions:

    1.) What is the square opening on the column for?

    2.) Which brand and accuracy grade of ballscrews & rail type did you use?

    3.) How will you align the column towards the Y? Measuring it with granite angle surface plate or...?

    Once again, congrats on everything you have achieved so far & I’m definitely looking forward and wishing for even more updates on everything you do!

    Of course some vodeo inputs would be even more appreciated

    Thank you once again for sharing all this with us & inspiring others to take a leap in such beautiful and valuable creations!

    Wish you all the best and may all the $/€ gods be with you!

    Aleksandar



  7. #107
    Member
    Join Date
    Apr 2008
    Location
    Slovenia
    Posts
    65
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    How is the build going, any progress ?
    What ballscrews did you use for this machine ?



  8. #108
    Banned Davidrio's Avatar
    Join Date
    Sep 2020
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Re: Large Epoxy granite VMC building

    These are some great tips! And you’ve got it right; it makes a massive difference. Choosing the right way to cleanEpoxy Floors can be pretty tricky, but this guide made it a lot simpler! Thank you so much for writing; this was helpful!



Page 6 of 6 FirstFirst ... 3456

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

Large Epoxy granite VMC building

Large Epoxy granite VMC building

Large Epoxy granite VMC building