Thread: 1220 2440 build

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  1. #61
    Quote Originally Posted by Desertboy View Post
    Looks a lot like my Z axis but I have BK12/BF12 fittings

    Attachment 23883

    Cost me ~100 to build but I recovered the Hiwin's.
    Yeah that's nice and simple looking, is it meaty enough Desertboy for your uses?

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  2. #62
    Quote Originally Posted by JAZZCNC View Post
    Here's design that will allow you to be more flexible with the frame. Although the base here is in one piece it could easily be made in 2 or 3 pieces and bolted together.
    The important part is the full-length profile section running full length down each side. This will allow you some flexibility in adjustment so can get both rails on same plane without messing around epoxy resin etc. Must stress thou the accuracy will only really be good enough for cutting woods and softer materials. It will also take lot of setting up and tweaking until spot on.
    In my experience profile is relatively flat and straight enough for wood router and does make fitting rails, ball screws etc much easier. The downside is cost so mixing steel and profile gives good balance of strength, costs and accuracy with ease of building which doesn't require too much machineing or timely and costly techniques for leveling etc.

    Attachment 23873
    Attachment 23874
    Attachment 23875
    Attachment 23876
    I guys hope all is well. So much to do with so little time! When I've been looking at doing something like this, I've been concerned about how to attach the profile to the steel so it's strong and minimises lateral forces. Are you really sure just bolting it on the bottom via those brackets is strong enough?

    I don't know how clear it is in the pictures I've sent, but I've used 90mm box section with 160 x 40 profile sat on the top. This gives 35mm overhang either side and would allow me to bolt the profile from the top down on the inside and outside edges of the outer steel lengths. Also does the gantry look strong enough now? Cheers.

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  3. #63
    Oh jeez I just worked out this base structure would weigh over 300kg!

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  4. #64
    Like this

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    Last edited by HullMark; 05-03-2018 at 03:34 PM.

  5. #65
    Quote Originally Posted by HullMark View Post
    I guys hope all is well. So much to do with so little time! When I've been looking at doing something like this, I've been concerned about how to attach the profile to the steel so it's strong and minimises lateral forces. Are you really sure just bolting it on the bottom via those brackets is strong enough?
    Never said was just bolted to brackets. In fact, it's not that simple.!
    There would be adjustment bolts between profile and steel to get the two rails parallel because couldn't rely on the frame being perfectly square.

    These are the hidden things which cannot be seen but make a huge difference to how well the machine performs. Again can't stress enough always think adjustability when designing.

  6. #66
    Quote Originally Posted by JAZZCNC View Post
    Never said was just bolted to brackets. In fact, it's not that simple.!
    There would be adjustment bolts between profile and steel to get the two rails parallel because couldn't rely on the frame being perfectly square.

    These are the hidden things which cannot be seen but make a huge difference to how well the machine performs. Again can't stress enough always think adjustability when designing.
    Thanks for getting back to me. Ahh I see! So how would you go about fixing those adjustment bolts to the steel frame? Showing my inexperience here. I was wondering about how with my design I could get the profiles lined up along the x axis (this is why I want ott with the aluminium in the earlier design), adjusting the height along the length wouldn't be a problem with those cleats, could just use shims ... I had an idea for the x axis, but it isn't empirical or anything, just basically a bit of measuring and trial and error.

    I appreciate what you're saying about being able to make adjustments, i can imagine all of the that could go wrong if things aren't aligned properly, and making things adjustable will allow me to get everything dialled in.


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    Last edited by HullMark; 05-03-2018 at 07:22 PM.

  7. #67
    Having considered the logistics and cost etc. I've decided to go with a smaller machine. This will fit in a brick shed that's already in my garden with ease. Should make things a lot easier and cheaper in terms of the build. 1220 x 1220 I can make work for what I want it for. Thanks for all the input so far from everyone it's been a lot of help!

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  8. #68
    Quote Originally Posted by HullMark View Post
    Having considered the logistics and cost etc. I've decided to go with a smaller machine. This will fit in a brick shed that's already in my garden with ease. Should make things a lot easier and cheaper in terms of the build. 1220 x 1220 I can make work for what I want it for. Thanks for all the input so far from everyone it's been a lot of help!

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    Good idea mark! For a long time I thought I had built mine too big. 90% of the time Im cutting stuff no bigger than A3


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  9. The Following User Says Thank You to malcolm01 For This Useful Post:


  10. #69
    Quote Originally Posted by malcolm01 View Post
    Good idea mark! For a long time I thought I had built mine too big. 90% of the time Im cutting stuff no bigger than A3


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    Thanks for the reply Malcolm. The way I figure it, if I build a smaller one with the same budget, I could make a better quality machine too. If I make it robust enough to work on aluminium, I'll be able to machine my own parts if I ever need to build a bigger machine.

    It's looking like September will be when I start the actual build process. I'm hoping to have everything together by then so I can get it done ASAP, without any errors and not skimp on costs.

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  11. #70
    Quote Originally Posted by HullMark View Post
    Thanks for the reply Malcolm. The way I figure it, if I build a smaller one with the same budget, I could make a better quality machine too. If I make it robust enough to work on aluminium, I'll be able to machine my own parts if I ever need to build a bigger machine.

    It's looking like September will be when I start the actual build process. I'm hoping to have everything together by then so I can get it done ASAP, without any errors and not skimp on costs.

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    Sounds like a plan pal


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