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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > 600 by 400 Ally profile 3 axis machine
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  1. #1
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    600 by 400 Ally profile 3 axis machine

    The main structure is Item 80 by 40 extrusions which are first bolted together and then clad with 8mm ally plate.

    The plate has been cut on my large CNC machine so accuracy of bolt positioning is spot on. The ends of the sections have been threaded 8mm and the other holes have sliding nuts in the slot profile. Fixing in the ends and faces ensures the profiles are sitting square and flush to the plates.

    First photo shows the frame.

    Second and third photos show all the 8mm plates after they have been machined, threaded, counterbored where necessary and de-burred. There was a few nights cutting those.

    Fourth photo shows it assembled.

    Fifth photo shows the gantry sitting on the rails and one section of t slot table that will be fitted. The gantry beam is a piece of 80 by 80 and a piece of 80 by 40 stitched together with bolts and sliding nuts. Ally plate will clad the beam and have all the linear rail bolt holes threaded in it.

    This machine will be a total build from the ground up similar to my last build - Tubot.

    http://www.cnczone.com/forums/open_s...8-tubot-2.html
    .
    .
    Attached Thumbnails Attached Thumbnails DCP_1121.JPG   DCP_1122.JPG   DCP_1123.JPG   DCP_1125.JPG   DCP_1127.JPG  

    cheers,
    Rod

    Perth, Western Australia

  2. #2
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    Rod, great looking build as always.

    Where do you source your 80x40 profile?

  3. #3
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    I got the profile from CNC and Cupcake World on ebay. I could be wrong about the profile being Item as it may be AME - not sure of which brand they sell but it is heavy walled and great for the smaller machines.
    I got it cut to size so not much work to putting a machine together if you don't plate it like i have.
    cheers,
    Rod

    Perth, Western Australia

  4. #4
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    Have assembled the gantry beam and photo shows the two pieces of extrusion bolted together then clad with 8mm plate on the sides and 10mm on top. The 10mm on top was all I had availalble in my scrap so good enough for the job.

    Next photo is the bearing carrier for the X axis. This will connect to the gantry sides. The slotted holes makes for fine adjustment to centre the gantry as well as the ability to square the gantry beam to the X axis down the track. I will replace the round head cap screws with conventional ones when I next visit the bolt shop.

    Last photo shows one of the X axis ballscrews fitted. It will be dual screws on X to prevent racking of the gantry. In the background you can see Tubot which has been earning it's keep making the smaller plates for this machine.

    T slot table is cut to size but needs to be fixed down - my next job.
    Attached Thumbnails Attached Thumbnails DCP_1131.JPG   DCP_1128.JPG   DCP_1130.JPG  
    cheers,
    Rod

    Perth, Western Australia

  5. #5
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    Stand was welded today. A bit over 2 lengths of 40 by 40 by 4mm SHS and some swivel castors and it is done. Well the frame is done but a lot of work to go to fit everything up and clad it.

    Left top will be a pull out console that lifts vertically for operating the machine. I have some 150 by 5 mm plates strengthened with angle to fix the four drawer runners to.

    Right top is a compartment for VFD and mains voltage switches and under that a 300 by 200 switchboard encolsure for the electroincs. Computer will go under the console and air pump on the other side.
    Attached Thumbnails Attached Thumbnails DCP_1143.JPG   DCP_1144.JPG  
    cheers,
    Rod

    Perth, Western Australia

  6. #6
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    Mar 2011
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    Looking great!

  7. #7
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    Nov 2006
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    Beautiful build! Question, do you index your rails to anything when installing to confirm that they are straight?

  8. #8
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    Thanks vtx1029 and Don.

    Don,
    Apart from sighting down the rails looking for the obvious I don't check them against a datum. I could slot the plates to contain the slides I suppose.

    I do a number of tests and adjustments with a dial gauge during assembly while aligning the rails to each other and squaring it to the table. I make sure there are slotted mounting points at critical intersections so I can adjust the components. Once the machine is running I calibrate it with a vernier using the software.

    The plates have been cut on my larger CNC machine so fitment is guaranteed unless I measure or get the drawing wrong. It happens and I discarded one machined plate on this build - ouch.

    Probably not scientific but it seems to work.
    cheers,
    Rod

    Perth, Western Australia

  9. #9
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    May 2006
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    I am in to see how it goes...though I think I can guess

    Russell.

  10. #10
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    G'day Russell,

    Just chugging along at a comfortable pace so it won't be finished anytime soon. Concentrating on features rather than completing the project.

    Sitting here designing a lever to lift a hinged console vertical when the drawer is opened. Can't open too soon as it will jam on the top frame when the drawer is opened so has to be a short throw but needs to raise it at least 60 degrees preferrably higher.
    Might have to resort to limit switches and a gear motor. Might also have to just lift it by hand.

    How is the canterlever build going?
    cheers,
    Rod

    Perth, Western Australia

  11. #11
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    May 2006
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    Hi Rod, maybe you could control it with another axis or two

    Hmmm Cantilever...it sounds familiar but not too sure what you are talking about (chair)

    Seriously though I might be acquiring a rather large machine that will help to finish the router, and anything else I am ever likely to build. Just have to wait to see how it pans out.

    Cheers.

    Russell.

  12. #12
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    Quote Originally Posted by Rodm1954 View Post
    Stand was welded today. A bit over 2 lengths of 40 by 40 by 4mm SHS and some swivel castors and it is done. Well the frame is done but a lot of work to go to fit everything up and clad it.
    ...
    Nice to see you do your own welding. I do some here but don't have good facilities to keep everything square, and/or hold stuff square while I weld it.

    Do you use anything for that? Like a metal bench with a flat top or any right angle jigs to hold the tubes while you are welding them? I have a couple of magnetic 90 degree clamps but they can be a real pain as they distort the arc. But then I'm not a great welder...

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