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Valen
Experienced Roboteer

Joined: 07 Jul 2004
Posts: 4436
Location: Sydney

In all the aviation cases i'm aware of there have only been minor injuries, and those were all caused by the pilots rubbing their eyes. FAA/CASA guidance is as I recall look away from the laser, any visual impacts will be brief, do not rub eyes.
(for all sensible powers of laser)

I would have thought that the existing laws against trying to crash planes would have been sufficient.

But no you need to make new laws or the media will go off at you.
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Mechanical engineers build weapons, civil engineers build targets

Sun Jul 03, 2011 8:31 pm

dyrodium
Experienced Roboteer

Joined: 24 Aug 2004
Posts: 6476
Location: Sydney

Wanted: Couple of spur gears for scooter motor drives, 3 or 4:1, steel or ali. 8mm bore for the pinion. Anyone got an alternative source to sdp-si? Crying or Very sad
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Fri Sep 02, 2011 12:05 pm

Knightrous
Site Admin

Joined: 15 Jun 2004
Posts: 8511
Location: NSW

Considered #25 chain? Hobbypart.com.au has them for a reasonable price.

11T sprocket = $8.95 http://www.hobbyparts.com.au/store/item/sp10635h0110635cs/sprockets635mmpitchsimplexmetal/
33T sprocket = $14.95 http://www.hobbyparts.com.au/store/item/sp10635p0330953cs/sprockets635mmpitchsimplexmetal/
44T sprocket = $14.95 http://www.hobbyparts.com.au/store/item/sp10635p0441270cs/sprockets635mmpitchsimplexmetal/

Alternatively, there are 4.5:1 planetary gears available for the 100watt scooter motors. They just need a housing, shaft and front bearing setup made (easy for you with your lathe) - http://www.ebay.com.au/itm/280681340694?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

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Fri Sep 02, 2011 12:36 pm

dyrodium
Experienced Roboteer

Joined: 24 Aug 2004
Posts: 6476
Location: Sydney

Holy crap those gearboxes are cool. Sold. Cool !
EDIT: Bought three for $82 shipped. Cheers dude, had no idea anything like that even existed...
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Fri Sep 02, 2011 12:40 pm

Knightrous
Site Admin

Joined: 15 Jun 2004
Posts: 8511
Location: NSW

quote:
Originally posted by dyrodium:

EDIT: Bought three for $82 shipped. Cheers dude, had no idea anything like that even existed...

They are now surplus items from a former EV Bike production. Can buy them new from the OEM supplier for like US$60ea though :S
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Fri Sep 02, 2011 12:49 pm

Glen
Experienced Roboteer

Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect

Hey dudes,

Anybody got any 18v DSE drill motors they could sell? Demon only needs one to survive this last event before it gets rebuilt with dewalt drives so if anyones got a spare they could get rid of that'd be amazing Smile

Name your price if so!
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Mon Oct 17, 2011 1:00 pm

Knightrous
Site Admin

Joined: 15 Jun 2004
Posts: 8511
Location: NSW

quote:
Originally posted by Glen:
Name your price if so!

$11ty billion Cool

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Mon Oct 17, 2011 2:16 pm

andrew

Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W

I have me 18 volt motors no gearbox or pinions attached but motors by themselves. Bought a box of four off eBay ages back.
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Andrew Welch, Team Unconventional Robotics

Mon Oct 17, 2011 2:18 pm

Glen
Experienced Roboteer

Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect

quote:
Originally posted by Knightrous:

quote:
Originally posted by Glen:
Name your price if so!

$11ty billion

Your imperial credits are no use here >_>

Hit me up on msn anyway dude, ill take em ;D
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Mon Oct 17, 2011 2:27 pm

timmeh
Experienced Roboteer

Joined: 20 Jul 2004
Posts: 2523
Location: Victoria

quote:
Originally posted by Vignesh:
Anyone know a place to get a powerful laser for astronomy? A green one. And would i need some kind of license to own it?

Build your own "i did" Cool

aixiz lasers sell eveything you need so dose ebay.

You need a laser diode and a driver board and a glass lens housing jiggy and some good rechargeable aa's.

I built a 1W blue laser cost me about $70 and it will pretty much hit the moon.
Also pops baloons and cuts out shapes in paper bags from 6 foot away and burns holes in cd cases and lights matches etc etc.

You could build a smaller one for cheaper that would be plenty for star pointing something like a 300mw would be plenty. Normal $2 shop ones are only 1mw.
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Tim Team Reaper.

Wed Oct 26, 2011 4:19 pm

timmeh
Experienced Roboteer

Joined: 20 Jul 2004
Posts: 2523
Location: Victoria

BOX OF STUFF

SOLD SOLD SOLD SOLD
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Last edited by timmeh on Sun Oct 30, 2011 8:57 pm; edited 1 time in total

Wed Oct 26, 2011 4:32 pm

andrew

Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W

Greetings

Have a few items for sale

more to be added soon

For now i have a wheelchair base completely working and some motors and misc

Also some 100 watta scooter drives and an old frame it bolts into if required

Make an offer

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Andrew Welch, Team Unconventional Robotics

Mon Nov 14, 2011 5:33 am

Andrew W

Joined: 01 Jun 2005
Posts: 220
Location: Melbourne, Victoria

Looking for a local source for #25 chain. http://www.hobbyparts.com.au wants over $70 for 10 feet (~3m) and they can only supply 1. Looked at http://www.robotmarketplace.com and they have it for around $25US for 10 feet, but they want nearly $50 for shipping (would be getting other things from them, so not a real worry).

Also looking for a local source of timing belts and pulleys. Was looking at http://www.hobbyparts.com.au and they are again charging significantly more (if they have any stock) than http://www.robotmarketplace.com . I'm looking at the XL pulleys. I'm after 4 72 tooth sprockets (RMP has them for ~$55US each) and 4 15 tooth sprockets (RMP has them for ~$15US each).

Between the pulleys and the chain, RMP is charging ~$80US for freight.

Anyone got any ideas for suppliers in Melbourne (or Australia)

Thanks

Mon Nov 14, 2011 3:50 pm

Knightrous
Site Admin

Joined: 15 Jun 2004
Posts: 8511
Location: NSW

Try SDP-SI

https://sdp-si.com/eStore/
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Mon Nov 14, 2011 4:00 pm

Glen
Experienced Roboteer

Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect

number 25 is pretty common, any bearing place should supply it. I cant remember the size anymore but i think 25 might be the same as pocket bike chains, thus mega cheap on ebay Smile Ill have to have a look in a bit if it is.
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Mon Nov 14, 2011 4:42 pm

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