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Thread: Magnexxica

  1. #11
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    Pp3d had quite a heavy fly wheel on though I think. About 30kg.

  2. #12
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    Cool build. Looking forward to more!

  3. #13
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    Triforce is 680x680x150mm with a 34kg weapon and still manages 6mm armour just fine. So I think that is doable as long as the weapon is light.

  4. #14
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    I did a weapon test against 1mm thick stainless steel and against 4mm thick aluminium. I'll test different armour against different tooth designs to see what works best.

    Here are the videos...




  5. #15
    TechAUmNu's Avatar
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    Try it against some 4mm hardoz and see if it makes a dent.

  6. #16
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    I'm going to test it against 6mm hardox, once I've made a 10mm thick hardox tooth.

    Once i hit the limits of what can be penetrated I'll look at making a clamping attachment to squeeze and hold rather than pierce.

  7. #17
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    In terms of tooth material, it's worth looking at tool steel. We're using H13 that's been tempered to 55HRC.

    It looks like a cool build - very interesting if you can with inside the weight limit. Don't forget those removable links!

  8. #18
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    Quote Originally Posted by emisnug View Post
    In terms of tooth material, it's worth looking at tool steel. We're using H13 that's been tempered to 55HRC.

    It looks like a cool build - very interesting if you can with inside the weight limit. Don't forget those removable links!
    That's about the same as hardox 600

  9. #19
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    Quote Originally Posted by TechAUmNu View Post
    That's about the same as hardox 600
    A bit cheaper in my experience though. And, iirc, a yield strength of somewhere in the region of 1850MPa. But can't remember

  10. #20
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    Yeah I'm looking at a few options at the moment. 01 tool steel, other tool steels, hardox 500, and various alloy steels. The shape is crucial too.

    I'll be testing an SDS point chisel, a chrome-vanadium steel centre punch and a diamond pen dresser tool (for truing grinding wheels). If I have a tooth point area of even 4mm squared, followed by a cylindrical shaft, it'll be in the region of 1.2 Giga Pascals of pressure (at 2000kg) and 4.9 Giga Pascals (at 8000kg). Something will deform, I need to make sure it's whatever is in the jaw.

    These are all pretty inexpensive (less than 5 quid each). These are to test the current (amp) load and the minimum speed (winch slow down) against 5mm aluminium and 3mm stainless steel. I should see what is working efficiently and what tooth materials are beginning to deform at their contact point.

    The whole weapon is powered by a small 14.4V 1800mAh Turnigy Nanotech battery. It gives around 35 to 40 seconds of constant maximum weapon power (130 amps).

    Apologies, I'm new to this site and should have made this thread in build diaries. I'll move it across.

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