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    Hi, this is my first stab at the design after having a good look at some of the great builds here. Any advice or comments would be greatly appreciated! Requirements for the machine as following
    Exclusively for machining aluminium
    Cutting area: 600mm x 450mm x 150mm.
    Speed is not a great issue
    I got hiwin HGR15 rails and blocks and Chinese 1605 ballskrews and ballnuts so I'll use those.
    Since aluminium is not cheap here I'm going for a welded steel design and then alu on Z because there's a bit of machining required there.


    Some basic dimensions for reference.
    Distance between gantry side rails: 800mm
    Distance between top and bottom rails on gantry: 300mm
    Z plate with 250mm
    Box section used is 160x80x3mm and 120x80x3mm
    10mm 10mm sheet for flat parts to be laser cut
    Y carrage and Z assembly is 25mm alu with a 10mm plate at the back


    A few questions:
    Will the long belts (+-650mm on Z and 550mm on Y) cause any issues? HTD 5mm pitch x 15mm width with 20tooth pulleys
    The gantry is very rigid and HEAVY but I'm worried about ressonance. Can one fill it with something that's not going to add a lot more weight that will help with resonance.
    Does the 3 rails on the gantry make sense? I've got 1 on top and two at the bottom.


    Please comment if you spot anything that's not going to work or things I can improve without adding major cost


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    Last edited by mitchejc; 17-12-2014 at 08:27 AM. Reason: build started

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