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  1. #1
    The day has come and I have finally started my 3-axis Gantry router build. I've been lurking on the forum for too long now and its time to do this. Firstly thanks to all the forum members who have contributed to the design - Jazz, John & HiltonSteve who inspired me with his build all those years ago. Attached are some 3d renderings and pics of stuff. Currently doing lots of drilling holes and counterboring in ali strip and plate for the bolts etc.
    Basic machine specs are:

    3-axis 1100 x 700 x 300 ballscrews.
    SBR20 on X SBR16 on Y & 7
    Frame from 80x40mm heavy and intermediate extrusions (2.8 and 4kg/m)
    Plate - Gantry sides 20mm cast plate 5083
    Z axis - Tooling plate cast 5083
    Frame Ends 15mm plate 6060

    3.1Nm Steppers CNC Kit 1 from Zapp

    Photos taken in a unit my neighbour has - did'nt trust the runout on my pillar drill with M8 clearance drill.

    Watch this space for more pics as build progresses

    Mike
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    looks like you have it all worked out, and plenty of space & a kettle!!. Keep the pictures coming..

  3. #3
    Should be a nice little build that. Looking forward to seeing it come together, keep us posted.

  4. #4
    Nice little wood cutting machine. Don't forget the energy chains. You might just fit one under the X rail on a shelf bolted to the extrusion.
    With the single ballscrew on X try to cut jobs on the centre line of the machine to reduce racking.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  5. #5
    Quote Originally Posted by routercnc View Post
    Nice little wood cutting machine. Don't forget the energy chains. You might just fit one under the X rail on a shelf bolted to the extrusion.
    With the single ballscrew on X try to cut jobs on the centre line of the machine to reduce racking.
    Nah there will be no problem cutting off centre in wood with this design at this size. I've built several know using almost identical design (probably because mikey copied most of my router design. . Lol) and they don't flex while cutting woods, even hard woods.

    That said I wouldn't use single screw for cutting aluminium or really deep DOC cuts in hardwoods as then there is potential for some racking.

    There is just enough room for energy chains between profiles but needs certain size. It also doesn't need a shelf as nearly half the chain can be supported or bolted to the profile and the remainder easily handles the weight of cables etc.

  6. #6
    Quote Originally Posted by JAZZCNC View Post
    Nah there will be no problem cutting off centre in wood with this design at this size. I've built several know using almost identical design (probably because mikey copied most of my router design. . Lol) and they don't flex while cutting woods, even hard woods. .
    Hi Jazz - I merely took the good advice that you offered !!!

    Once the machine is up and running (and doing some useful work) I will upgrade to twin belt-driven ball screws.

    I admit that the energy chains location is a bit of an afterthought....

    Thanks
    Mike

  7. #7
    Looking good Mike!! I've used a 50mm round linear rail bearing housing (bought it from Zapp) which can be picked out quite cheaply on ebay. Jyst take out the circling holding the bearing in and press put the bearing, cut through one side and when you tighten it down it clamps the spindle....

    Neil...

    Build log...here

  8. #8
    Quote Originally Posted by njhussey View Post
    Looking good Mike!! I've used a 50mm round linear rail bearing housing (bought it from Zapp) which can be picked out quite cheaply on ebay. Jyst take out the circling holding the bearing in and press put the bearing, cut through one side and when you tighten it down it clamps the spindle....

    Thanks nj for the tip. Trying to keep the gantry weight down as it will approach 30kg when fully loaded with spindle z-axis and rails.

  9. #9
    You could always cut a couple of slivers off it at either end to keep the bolt holes??

    If I had my router finished (nearly!!!!!!!) Then I'd cut you some but as it is you might be waiting a few weeks yet.....

    I've got a Nema 23 driving my Z axis up and down and ive got a 40mm plate dangling out front, Nema 23 on the Y axis and they're set at 10m/min rapids at the moment and they handle it fine....mind you I've a 8Nm Nema 34 on the X axis
    Last edited by njhussey; 14-07-2015 at 03:40 PM.
    Neil...

    Build log...here

  10. #10
    Congratulations on nearing the end of your build and setup. I'm hoping to get the machine moving under computer control by September and fine tuned and ready for real work by the end of the year...

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