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Thread: 7' X 4' Combi

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  1. #11
    Hi Rick,

    See Little things but important and worth the little extra effort.!

    First the linear rails and bearing pockets. Ideally you want registers to aid alignment/re-assembly and because your pocketing the bearings you can use the walls of these pockets has the registers by making sure the bearings on one side of each set of bearings aliagn with the walls (See Red circles in pics).

    Also I'm sure this you know but I'll point out any way just in case.? The pockets have square corners and we can't easily machine sq corners. So the pockets will need additional length to allow for the radius of the cutter. (circled Blue)

    Can I just ask what's the rectangular piece with 2 holes.? (circled green)

    The top stepper bracket.? Is it a 2 piece part or single.? Doesn't really need to be 2 piece and could be single and still do the job. Also the little bits that lock into the pockets won't be needed and make the machining and fit harder than needs to be Again due to radius corners clashing with square edges.
    To be honest all the pockets and step down on top piece could also be done away with and reduce machine time without adding a massive amount of weight. Lot of work in that one piece that doesn't need or had much to the machine.

    The I'd also leave a small skin 1-2mm on the lightening pockets on rear plate so it doesn't leave access for flying chips.

    I know it's just probably to save drawing but remember all internal corners will have radius so take care this doesn't catch you out if anything is close on dimensions or catching.?

    Edit: Oh Before those observing think I'm being negative or putting someones work down which to be honest I'm getting sick being accused off then Ric asked me to have a look and comment.
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