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  1. So I finally got round to redesigning the A200S...

    So I finally got round to redesigning the A200S for a V2 version with a different layout. It is now comically small and performs really well.

    The power stage layout is based on the 75/300, so it...
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    They can only do straight cuts. Which also means...

    They can only do straight cuts. Which also means all parts have curf on them. If you get a 3d waterjet, or one that compensates for curf you can get perfectly straight cuts or any angle you want.
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    Been working on a new design to solve our drive...

    Been working on a new design to solve our drive problems. When we got back we tried driving around again after fixing the front wheels and snapped both drive belts! So new plan is for 2 wheel drive...
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    I was originally looking at old car wheels, but...

    I was originally looking at old car wheels, but then realized that most car wheels rarely go above 1000RPM in normal operation so running them at 6000 or so might end badly!

    The engine flywheels...
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    Bought some Masda RX8 flywheels on ebay. 6kg each...

    Bought some Masda RX8 flywheels on ebay. 6kg each and has a bolt hole pattern at the edge so I can add extra plates and change the weight and a keyway on the bore.
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    Looking for a big flywheel

    I am looking for a large flywheel to test my escs on inertial loads. Needs to be pretty heavy maybe 20kg and have a centre hole.

    Obviously I could just get kcut to cut some steel plate into a...
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    Our LED strips on Elevate were making so much...

    Our LED strips on Elevate were making so much heat we thought they would set the batteries on fire!
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    Finally got round to taking a video of the drum...

    Finally got round to taking a video of the drum testing.

    This is at 10500RPM, 60A motor current (can go to 90A), limited to 80% duty cycle by the erpm limit of the focbox. Spindown time is 53s.
    ...
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    We use FOCBOX for Elevate. Which are basically a...

    We use FOCBOX for Elevate. Which are basically a vesc 4 in the same general design as the vesc 6 but much cheaper (pretty sure vedder copied the focbox power stage layout for the vesc 6). You can...
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    Now back from Insomnia, unfortunately the harder...

    Now back from Insomnia, unfortunately the harder rubber for our wheels didn't arrive in time and the 50 shore we had was just way too soft, we found a bunch of issues and fixed pretty much all of...
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    Lots more work! Finished the main bits of the...

    Lots more work! Finished the main bits of the drum weighs in at about 3.5kg so far. Still needs the shoulder bolts and magnet can for the hub motor.

    8373

    We cast on of the tyres to see what the...
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    Finally finished the drum core and shrink fitted...

    Finally finished the drum core and shrink fitted the bearings. Just need to glue in the motor can and drill the holes for the shoulder bolts.

    83658366836783688369

    Also got in some nice shiny...
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    Lots of work this weekend on the new drums got...

    Lots of work this weekend on the new drums got the first one mostly bored out, bearing pocket is done and the first hardox tooth fits on nicely. Now I need to flip it round and do the other side......
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    The armor should be able to flex around enough to...

    The armor should be able to flex around enough to stop most spinners. I see many designs where people have a flat plate mounted with lots of shock mounts. The folks on battlebots do it a lot and the...
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    I have removed the webs from the areas needing...

    I have removed the webs from the areas needing the most strength around the front. The titanium is only there to stop debris getting into the compartment. So it doesn't really matter how strong it...
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    Titanium laser cutting

    Anyone know a place that does laser cutting of Titanium and has grade 5 in stock?
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    The front wheels are small to save weight, and...

    The front wheels are small to save weight, and keep them behind the armor so the top of them doesn't get hit.

    The back wheels are big so they clear the chassis enough for the bot to be invertable,...
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    Lots more work on the bot, got the armor all...

    Lots more work on the bot, got the armor all worked out ready for kcut to cut and fold it, hopefully they can manage the shape.

    Also had to order another 2 aluminium bars to redo the drum, as I...
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    Really hoping the armor keeps it protected, gonna...

    Really hoping the armor keeps it protected, gonna be a mess if something like Neon hits it!
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    Some more work today making the chassis...

    Some more work today making the chassis lighter... all the frame pieces are 20mm aluminium with 1mm titanium on both sides.

    8345
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    I am not sure about BW but pretty much every drum...

    I am not sure about BW but pretty much every drum I know of uses taper roller bearings.
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    Eventually got on to some bot parts, here are the...

    Eventually got on to some bot parts, here are the four axles, just need to cut them apart on the chop saw.
    8340

    was originally going to do them in titanium but decided it was too heavy. Now just...
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    We got accepted for Insomnia! So now the epic...

    We got accepted for Insomnia! So now the epic panic build begins. We called the bot 'Elevate'

    Before we can even begin to make the aluminium frame we need to finish building our new cnc mill...
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    3x 150CC Rotomax

    3x 150CC Rotomax
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    Figured people would be interested to know where...

    Figured people would be interested to know where the parts are from...

    I got a load of the NTM motors and the batteries in a hobbyking sale a few months back for about half price.
    The focbox are...
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