1. #1
    Hi
    I'm James Mitchell, a 47 year old computer programmer from South Africa. Thanks for all the great info here on myCNCUK! Decided to take the plunge and and build a rigid CNC router exclusively for cutting aluminium parts. I have a 2.1m x 1.4m x .15m commercially build router that I have been running for the last 5 years and I need (no, want :-) ) something better for machining aluminium. Something like a Datron M75 would be first prize but that's never going to happen so my specs/ideas for the build are something as following:

    Cutting area: 600mm x 450mm x 150mm.
    Linear guides & ballskrew (I have Hiwin 15HGH 900mm, 750mm and 350mm rails & blocks and 4 x Chinese 1605 ballskews so I'm going with that)
    Expected performance: Speed is not a great issue and I'd be very happy with 4000mm/min rapids with decent acceleration and hopefully 1000 - 2000mm/min for cutting.
    I'm really hoping for great accuracy and repeatability. Not sure how to quantify but lets say <0.2mm tolerance on smaller parts
    Construction will be steel or Alu
    Weight is not a big issue as I plan to use decent sized motors and drivers.

    I'm a bit in information overload mode at the moment and I'm having a hard time deciding on a good design. Fixed gantry or moving gantry etc but I'll start asking specific questions later.

    Thanks
    James

  2. #2
    Welcome from another colony under the southern cross!
    .
    I cannot recall many(any?) fixed-gantry builds on here, but these may help you make a running start:
    .
    Deisel's fixed-gantry = http://www.mycncuk.com/threads/6516-...8872#post48872
    .
    Jonathan's moving-gantry = http://www.mycncuk.com/threads/6484-...strong-machine
    .
    Andy

  3. #3
    Wellcome to the site. For your uses and the machine size I feel sure that fixed gantry is the way to go. Good luck. G.

  4. #4
    Quote Originally Posted by AndyGuid View Post
    Welcome from another colony under the southern cross!
    .
    I cannot recall many(any?) fixed-gantry builds on here, but these may help you make a running start:
    .
    Deisel's fixed-gantry = http://www.mycncuk.com/threads/6516-...8872#post48872
    .
    Jonathan's moving-gantry = http://www.mycncuk.com/threads/6484-...strong-machine
    .
    Andy
    Hear is a small very capable fix gantry machine that run very nice http://www.mycncuk.com/threads/7001-...t=fixed+gantry created by Wal. ..Clive

  5. #5
    Thank you much gents, I'll certainly have a look at those threads!

    Considering the copious amounts of aluminium that goes into some of these builds I'm curious how much aluminium costs over there? Here its +- ZAR 75-00 per kg (EU 5.50/kg) for thick sheet type material. Specialized extrusions is more expensive and often sold per meter not kg.

  6. #6
    mekanik's Avatar
    Lives in Barrow in Furness, United Kingdom. Last Activity: 23 Hours Ago Has been a member for 8-9 years. Has a total post count of 600. Received thanks 66 times, giving thanks to others 94 times.
    Hi mitchejc welcome to the forum
    sounds like steel might be your best option.
    Mike

  7. #7
    Thanks, yep I really like the look of those nice alu machines but steel is likely to be my best bet.

Similar Threads

  1. NEW MEMBER: Hi from South Africa, a little help please
    By daniebjoubert in forum New Member Introductions
    Replies: 11
    Last Post: 25-03-2014, 07:38 PM
  2. NEW MEMBER: Hello from South Africa
    By Les Bidgood in forum New Member Introductions
    Replies: 7
    Last Post: 14-06-2013, 04:24 AM
  3. NEW MEMBER: New Member. Greeting from South Africa
    By Les Bidgood in forum New Member Introductions
    Replies: 3
    Last Post: 02-04-2011, 03:44 PM
  4. NEW MEMBER: Hello from me, Ivan and sunny South Africa.
    By itzar in forum New Member Introductions
    Replies: 1
    Last Post: 19-11-2010, 11:40 PM
  5. NEW MEMBER: Hello from South Africa
    By rotacraft in forum New Member Introductions
    Replies: 1
    Last Post: 19-09-2010, 12:52 AM

Bookmarks

Posting Permissions

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