Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
Is it all 3 or can it be just the weopon controll. that all dangerous parts of a robot must shut off if anything goes wrong.
If a robot goes out of controll it will most likely slam in the wall and spin its wheels. _________________ Andrew Welch, Team Unconventional Robotics
Thu Aug 26, 2004 9:59 pm
Spockie-Tech Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
Doesnt matter, if you turn the radio off, everything moving must *stop*. Drive included sorry.
Its all very well to rely on the arena to protect you, but if for any reason your bot was running anywhere else, you need a way to stop it once it cant "hear" you any more.
Having a failsafe has already saved us from some embarrassing situations that I'm not going to tell everyone about in public. If you could be certain your bot was always in an arena when powered up, you wouldnt need a failsafe at all..
besides, its makes insurance/risk people feel much better when they hear that all bots have to completely stop when the radio link is down _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
Thu Aug 26, 2004 10:17 pm
timmeh Experienced Roboteer
Joined: 20 Jul 2004
Posts: 2523
Location: Victoria
I have two options with myweapon drive sytem and i cant decide which one to go with.
The ev motor will be running at 18v 3000rpm.
Should i go 1000rpm 1-3 reduction = more drive power
Or 1500rpm 1-2 reduction = more speed
Which one would be more destructive? _________________ Tim Team Reaper.
Mon Sep 20, 2004 10:28 pm
andrew
Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
Well since u r using a ev warrior then a 1:1 reduction is fine. Basilsik ev warior version mounted a solid steel bar directly to the motor for ahnialator and it spun that sucker up in no time at 12 volt. 24 volt or 18 will be unrealistically crazy and cool.
if u gearsomething down u slow it down but speed up the spin up time.
In your case u do not need any reduction and a 1:1 belt drive or whatever would be fine i reckon for a vertical blade. _________________ Andrew Welch, Team Unconventional Robotics
Mon Sep 20, 2004 11:03 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
the original Basilisk was actually running two parallel 14.4V NiMh packs and spun its bar up in just a few seconds.
For destruction, more speed is always better! More weight is OK and more torque is good for recovery time, but speed wins the fight for you . THe EV at 1:1 and 24V will be plenty, just make sure its held down firmly. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Tue Sep 21, 2004 1:26 am
timmeh Experienced Roboteer
Joined: 20 Jul 2004
Posts: 2523
Location: Victoria
Can evs run at 36v _________________ Tim Team Reaper.
Tue Sep 21, 2004 8:02 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
Joined: 20 Jul 2004
Posts: 2523
Location: Victoria
Why is that? _________________ Tim Team Reaper.
Tue Sep 21, 2004 9:07 pm
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
well on the large stall, the brushes start arcing and sometimes they blow the tails off the brushes. _________________ https://www.halfdonethings.com/
Tue Sep 21, 2004 9:09 pm
timmeh Experienced Roboteer
Joined: 20 Jul 2004
Posts: 2523
Location: Victoria
Ok didnt know that one.
If i do that for any reason i will fix it with larger braded wire.
And wile im in the motor i will glue the magnets in place. _________________ Tim Team Reaper.
Tue Sep 21, 2004 9:15 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
i somehow doubt replacing the brushes with braided wire will work.
a 24v ev warrior is almost an invincible motor from what ive heard if you just belt drive it (i.e no direct drive). theres a few 1:1 featherweight spinners out there. road dots revenge and ZOK come to mind. but i guess at 18v 2:1 would probably do the trick. _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
Tue Sep 21, 2004 9:24 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
I don't think the braid can be replaced even if its a bit thin. It feels like about 14g wire and will probably get really hot during a stall, but how does one attach copper to graphite reliably? There is also the problem of that thin slot that the braid runs in... _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
Wed Sep 22, 2004 12:27 am
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
i dont think you can attach copper to graphite
graphite is pretty damn slippery stuff
i believe that generally the copper is there and the brush is moulded/deposited around it? _________________ Mechanical engineers build weapons, civil engineers build targets
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