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Type: Posts; User: MikeNCR

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    That's odd, when I go to...

    That's odd, when I go to http://www.revrobotics.com/ I don't see anything along those lines. As far as the ESC's go, they're pretty decent. There's a test & teardown video here if you're interested: ...
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    It's a bit more than just that, there's an...

    It's a bit more than just that, there's an internal flywheel at a much higher rpm that's mechanically linked to the flipper which is why it's able to launch other bots so well.
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    Spanky was due for a bit of an upgrade, so after...

    Spanky was due for a bit of an upgrade, so after quite a bit of design work and some laser & waterjetting I put this together:

    https://www.youtube.com/watch?v=kTLujqWzp5Q
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    If people are interested in looking at alternate...

    If people are interested in looking at alternate rules packages, here's the SPARC has an optional rule where non-wheeled robots that don't classify as true walkers (typically referred to as...
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    Given that the real droid was made by...

    Given that the real droid was made by Orbotix/Sphero, I'd guess that it's essentially a massive Sphero with a couple magnets on an arm that the head follows. (with a few rollers built into the head...
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    This is a rule that really should be looked at....

    This is a rule that really should be looked at. You can be plenty mobile with a single powered wheel.

    for example:
    http://tinyurl.com/lq34789
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    The old drum bot is Plasma, made by Stephen Felk-...

    The old drum bot is Plasma, made by Stephen Felk- http://www.buildersdb.com/botdetails.asp?botid=5589
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    Not if you want to use 1.5-2" wide ones between...

    Not if you want to use 1.5-2" wide ones between 3" and 8" diameter with a 1/2" keyed shaft-
    http://nearchaos.net/chaos-hubs/

    Vex also has a line of hex bored colsons-...
  9. Thread: Exposed wheels

    by MikeNCR
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    4,203

    Sitting flat on the floor there isn't a real...

    Sitting flat on the floor there isn't a real advantage. What it helps with are things like you said, where someone's underneath it. It's also a perk when the bot gets inverted because it allows for...
  10. Thread: Exposed wheels

    by MikeNCR
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    Exposed wheels are a risk, but I’d argue that for...

    Exposed wheels are a risk, but I’d argue that for some designs it’s absolutely the best option.


    If you look at my 1lb bot Algos (http://www.buildersdb.com/botpics/8860.jpg) it’s got one of the...
  11. I fully intend to apply with Nyx (and maybe...

    I fully intend to apply with Nyx (and maybe Spanky since that's Julies bot) once I've got an anti-spinner module for Nyx and the finances/leave available to swing the trip.
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    It was a very loose ruleset with a name that was...

    It was a very loose ruleset with a name that was changed to be a bit more audience friendly-

    https://docs.google.com/document/d/1P6wln5phAGCW9Gb3w4UsQdvz01fLomSV5cikM8dC_NU/edit#
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    Motorama 2015 Video

    Playlists for Motorama 2015 are up:

    http://sparc.tools/forum/index.php?topic=76.msg644#msg644
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    Could always go this route if you want to up the...

    Could always go this route if you want to up the force-

    https://www.youtube.com/watch?v=ytVYWncox_A
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    The quick shorthand calc is- output rpm*wheel...

    The quick shorthand calc is-

    output rpm*wheel diameter in inches*0.003=speed in mph

    so, rearranging that-

    speed in mph / (wheel diameter in inches * 0.003)

    It's not perfectly accurate,...
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    The instructable on Nyx is live. Covers the full...

    The instructable on Nyx is live. Covers the full process and includes the original cad files along with alternate parts suggestions where applicable.
    ...
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    It's hitting 1/8" 6061. Speaking of CAD files,...

    It's hitting 1/8" 6061.

    Speaking of CAD files, NFX, here's the lot of them- http://nearchaos.net/NyxCadFiles.rar
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    Video of the axe at 140A- ...

    Video of the axe at 140A-

    http://www.youtube.com/watch?v=ysyFJpkR95w

    High speed video (120fps) at 140A-

    http://www.youtube.com/watch?v=x_5ijjdr39g
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    Lifter Test:...

    Lifter Test:
    http://www.youtube.com/watch?v=QwsV7vMWkRo

    Axe Test:
    https://www.youtube.com/watch?v=3xK3IBN9K8A

    Both were done with the Ragebridge set to 50A, so for the lifter that's a...
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    Going to do some initial testing first at low...

    Going to do some initial testing first at low power, then turn it up to competition level for the videos.
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    Decided to be productive last night. ...

    Decided to be productive last night.

    http://i.imgur.com/Vaf8EnM.jpg
  22. Thread: New...

    by MikeNCR
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    If you're targeting Dragon Con, I'm guessing...

    If you're targeting Dragon Con, I'm guessing you're somewhere in the southeastern part of the US, so I'll pass out a few useful links-

    https://www.facebook.com/groups/RoboCommunity/ -This is the...
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    Spent today working on the hammer. Running at...

    Spent today working on the hammer. Running at <30A per half of the mag (55-60A max current) it was nearly able to punch through 1/8" 5052 alu. Initial functionality tests are going to be done at...
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    https://www.youtube.com/watch?v=ytVYWncox_A ...

    https://www.youtube.com/watch?v=ytVYWncox_A

    Test of the crusher attachment on Nyx. I'm not cranking it up to full force as I don't want to risk damaging the armor on Spanky. What this video does...
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    I'd give the Ragebridge a look. I've been running...

    I'd give the Ragebridge a look. I've been running a pair of feathers with Ragebridges and 18v Dewalts and they've been quite happy.
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