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Modding Project: DIY CNC - V3 Reinforced Z Axis

Discussion in 'Modding' started by lenne0815, 16 Dec 2009.

  1. lenne0815

    lenne0815 What has been seen cannot be unseen

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    I mentioned it before a couple of times already im was planning to build an diy cnc.

    My inital specs for the machiene are:

    capability of routing up to

    - 19mm mdf / whiteboard

    - 5mm aluminium

    - ~700 x 700 mm working area

    - 3 controlable axles (for now there wont be a 4rth axis to tilt the router itslef, maybe i add it later for complex 3d shapes)

    - minimum room requirement ( therby it has to work like one of its bigger brothers, the workpiece itself wont move, complicating the build further)

    To make it a bit clearer here is an simple skp drawing showing the basic shape of the cnc:

    [​IMG]

    Green are the linear rails and the spindles, red are the stepper motors.

    After coming back to germany i needed some time to set myself up again, but now i got all the bits and pieces together, so yesterday i could actually start building it !

    right now the cnc consists of a makeshift table / baseplate ( ikea second hand store is my friend ) , mounted linear rails for the first axis and parts of the actual tool holder.

    Today ill try to mount the whole upper part, so expect more pics soon !



    pic of the mounted rails on the table

    [​IMG]

    Working on the lower part of the tool holder ( i know im messy, got too exited :D

    [​IMG]

    [​IMG]

    Close up on one of the runners

    [​IMG]

    Runners mounted

    [​IMG]

    One side of the lower part of the tool holder complete with mounted runners

    [​IMG]

    The whole thing

    [​IMG]

    closeup of the rails, already with the lower part sitting on them

    [​IMG]

    another closeup

    [​IMG]

    The whole thing in all its glory :)

    [​IMG]
     
    Last edited: 19 Jul 2012
    Nanosec likes this.
  2. Nanosec

    Nanosec absit iniuria verbis

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    Great Start !!!
     
  3. lenne0815

    lenne0815 What has been seen cannot be unseen

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    I was freaking out that the whole thing jams on the linear rails, but after a lot of fiddling it runs smooth as silk :D
     
  4. stonedsurd

    stonedsurd Is a cackling Yuletide Belgian

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    That's pretty interesting. I'm really thinking of biting the bullet on one of these DIY CNC jobbies. But college leaves me with no bloody spare time :(
     
  5. -Acid-

    -Acid- New Member

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    how much are those runners????


    looking good so far
     
  6. lenne0815

    lenne0815 What has been seen cannot be unseen

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    i got a set with 4 linear rails 800mm and eight runners, they were 200 euros ( pretty cheap considering they are usually around 90 euros per rail with two runners)

    i think the whole lot wil cost me roughly 800 in the end, but its the same as usual, without spending anything u dont get anything.
     
    Last edited: 16 Dec 2009
  7. subset7

    subset7 Spanking the Monkey

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    I've often pondered,building a DIY CNC machine but never took the plunge so i'll be following this with interest,great start,subscribed :thumb:
     
  8. Cheapskate

    Cheapskate Insane? or just stupid?

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    It's good that you have it up on a table. It's hell to oil the drive screw mounted under the table.
     
  9. lenne0815

    lenne0815 What has been seen cannot be unseen

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    unfortunately, one drive screw will be under the table :D

    moar pics:

    Redone the mount for the lower part ( now adjustable and much easier to reach )

    [​IMG]

    drilling the "middle" plate which will later hold the short rails (300mm) for the tool

    [​IMG]

    [​IMG]

    closeup of the top part, already assembled with another 800mm set of rails

    [​IMG]

    another shot from the top rail assemply, now with the mounted middle part

    [​IMG]

    the lot

    [​IMG]

    [​IMG]
     
  10. Sleepstreamer

    Sleepstreamer I modded christmas!

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    Looks good, personally I'd build it from aluminium profiles, but I guess it depends on what you intend to do with it.

    I'm not certain about this, but your linear components look very similar to these ones: http://myworld.ebay.com/linearmotionbearings2008/

    Are they any good?
     
    Last edited: 16 Dec 2009
  11. lenne0815

    lenne0815 What has been seen cannot be unseen

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    dunno bout these, might be the same ?

    i would use aluminium profiles aswell, but proper ones are friggin dear...
     
  12. KrunchR

    KrunchR New Member

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    Sub'd. If theres one thing I want, its homebrew cnc!
     
  13. Sleepstreamer

    Sleepstreamer I modded christmas!

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    Yes unfortunately, the cheapest ones I've found are from here: http://www.smt-montagetechnik.de/produkte/k-1.htm

    I'm currently planning to build myself a new & improved machine, since the one I have now is rather dated, so I'll def follow your build :)
     
  14. lenne0815

    lenne0815 What has been seen cannot be unseen

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    what im planning later on when this iteration of the cnc is working to mill all the connection pieces and sandwich them out of - 5m alu + 10 mm multiplex + 5mm alu - with epoxy that should be rigid enough :D

    i checked ur link sleep but as i said, for me its just too dear :(
     
  15. barry99705

    barry99705 sudo rm -Rf /

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  16. Nanosec

    Nanosec absit iniuria verbis

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    + Rep ... I have added this thread to my subscription list mostly because not all the pics come out at work (where i read this forum most often) and partly because I want to make sure and not miss seeing it all come together
     
  17. lenne0815

    lenne0815 What has been seen cannot be unseen

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    cheers mate :) somehow bit tech is like one of these addictive mmos, im such a rep whore :D anyway, today i wanted to reinforce the main table and mount the top part, but its really freezing here right now ( -7c ) and snowing like hell, my small workshop isnt heated, so maybe i skip today :(

    I decided to redo the smaller top plate, first time i did it came out too crappy cuz i didnt have spade bits to properly countersink the holes...
     
  18. bfelda

    bfelda ____

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    Great Project

    Most diy CNC projects only cover small area's. This larger design is what I have been looking to see built. I wonder if the wooden components will keep the noise down a bit. Great project and thanks for sharing!:thumb:
     
  19. lenne0815

    lenne0815 What has been seen cannot be unseen

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    After having too much time to think about my project and no time to actually work on it ( moved, bought car, found job etc etc ) i decided to completely redo the design again.

    My new design will be mainly based on 45x45 bosch aluminium system profiles, because to be honest it would work the way i started, but the lack of overall rigidity would cause mayor problems later on :( so heres a quick update on how it will look:

    [​IMG]

    the profiles and brackets will roughly be another 200 euros, but i really think itll be nesessary..
     
  20. Sleepstreamer

    Sleepstreamer I modded christmas!

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    Good call I'd say, these changes will make it so much more usable.
     

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