1. #1
    Good day, I need some 10mm (well 10.1 for clearance really) counter-bored holes drilled in some plywood (50mm) boards......

    1) 32 boards with 16 holes
    2) 8 boards with 23 holes (16 of the holes are the same as the above and there are 7 unique ones for this batch of boards)
    3) 8 boards with 23 holes (as above)
    4) 8 boards with 23 holes (same again)
    5) 8 boards with 23 holes (guess what)

    Click image for larger version. 

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    The idea is that each angle shown has a pyrotechnic strapped to it which will then when fired head off in the direction prescribed by the drilling of the hole.

    The attached images (3D CAD drawings would eventually follow) show basically what we would be looking for, 50mm plywood (nominally) with either 16 (in the case shown) or 23 holes drilled through on a grid basis each (set) with a specific pan and tilt.

    The grey holders we would have made elsewhere I understand that perhaps the 50mm boards would have to be made from 2off 25mm boards drilled separately.

    The panels are 600mm square at the moment but that is just for the sake of argument.

    The round bits on the bottom of the angles are stud which we would spin a nut onto (into the counterbore with a washer) to hold the grey holder jobs in the board.

    If you can do this job then I would be most interested to speak to you, if I have missed information that is important to CNC people (I am sadly not one) then please ask, regards, Phil

  2. #2
    Great pics Phil... Being a newbie to this CNC thing myself I would think a 5-axis machine would be ideal for this... but the crowd on here are extra helpful and innovative. Hope you have some luck with this.

  3. #3
    I think you will have difficultly getting this done with a 5-axis machine since I don't think anyone on the forum besides myself have ever had 5-axis on their machine.

    However perhaps the design could be adjusted to be able to be cut with just 3-axis? The 50mm part could be 'sliced' into (for instance) about eight sheets of 6mm plywood and the holes which would be elliptical cut with 3-axis. Put reference holes in the corners for pins/dowels/something to align them then glue them all together. Clearly this would result in a stepped finish, but if that's sufficent it would be a cheap method. You might even get away with two sheets of 6mm plywood with a void in between which would save a lot of cutting.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  4. #4
    Many thanks for that, I will return to the drawing board for the moment in that case and see what we can do, I think it would have to be the full stack as there is a fair amount of down force on this assembly,

    Thank you very much - it's easy when someone else knows how! (slightly ashamed that-that solution evaded me)

    That will also give me many more options for where to get it all done as well, that does make it 10 080 holes and 512 boards (wow), that is going to take a lot of sorting! Phil

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