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  1. #111
    I've started welding it at last!
    I clamped everything together with M12 studs and G clamps:

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    First weld was fine:

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    Didn't need the hammer to get the slag off...the wind did that for me!

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    Some tacking:

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    Then I got worse...

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  2. #112
    I've finished one side of the frame... took all day! It's nice and flat/square :)

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    Got some tidying up to do now! ...

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    I'm going to get the other side of the frame clamped up now, and weld it tomorrow. I think I'll clamp the other side to the side I've just welded.

  3. #113
    I have now welded the second side of the frame. I clamped it to the other side to get it flat etc:

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    I then tacked it together and welded the horizontal joins ... then rotated it and did the same etc:

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    My welding is getting much more consistent. Still probably should have chosen something simpler for my first welding project!

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    Now I have positioned the remaining pieces to work out how to proceed:

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    I decided to use some spacers from steel tube. I'll put a few more in and use them to clamp the in between pieces. Cats were interested...

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    Any comments / ideas welcome.

  4. #114
    Quote Originally Posted by chip View Post
    thats looking good ,when will it be finished?
    Thank you..... as soon as possible! I've just moved the frame up into the workshop since I decided it's best to weld it in there. I'm going to get it clamped together now (just stopped for a tea break!) and weld tonight.
    I think realistically another two weeks to get it running, and some more for it to actually be finished. When the frame is done I still have quite a few parts to make to mount the X and Y-axis ballscrews and rotating ballnuts.

  5. #115
    Frame clamped together then tack welded:

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    Some welding, then rotate it...
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    A weld:
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    Done!
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  6. #116
    Finally got the gantry mounted. Started making the aluminium plates to mount the X-axis bearings on 50mm wide, then realised it needed to be 60mm so that was a waste :sad: ... anyway, picture:

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    The important point is I now don't have very high gantry sides, so the machine should be much more rigid.

    I spent all of today working out where to put these holes for the Y-axis ballscrew bearing mount:
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  7. #117
    Got it all together ... and it works!
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    The last photo was after cutting 3mm off the edge of a sheet of 18mm MDF in one pass at 6000mm/min.

    Y-axis rapid speed is 16000mm/min, X-axis is 10500mm/min and Z is 8000mm/min. The Y-axis will do much more, but I've left it at that as I don't see much point having it twice as fast as the X-axis. I prefer to keep the resolution good...

    I think I'll try cutting some aluminium now.

    (More to follow shortly, + video)
    Last edited by Jonathan; 16-07-2011 at 09:17 PM.

  8. #118
    I tried cutting a sign ... the test one with V-carve:

    http://www.youtube.com/watch?v=ThVYR...=youtube_gdata

    I need to get a cutter which has a sharper point ... that one has a 3mm or so flat on the end which spoilt things somewhat.

  9. #119
    Just tried cutting aluminium ... no problem! I put a bit of cutting fluid in the slot as it went round at 800mm/min, 0.85mm depth of cut with 6mm 2 flute HSS cutter @ 9000rpm. A lot faster than I could have used on my milling machine.

    The edges are reasonably nice, still room for improvement but not bad I reckon for a first attempt. Next time I will add a climb milled finishing pass. Better than the milling machine...

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    Video:

    http://www.youtube.com/watch?v=ossjj...=youtube_gdata

    I'm happy now that the conversion was worth it ... I always wanted the machine to be able to cut aluminium at a decent feedrate. I might try a relief with aluminium and ball nose cutter next.
    Last edited by Jonathan; 17-07-2011 at 04:43 PM.

  10. #120
    nice cnc you have there Jonathan are you going to paint it at some point ??

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