Joined: 04 May 2011
Posts: 66
Location: Sydney NSW
I am looking at making my first combat bot (wedge or ram type) however have parts at home from earlier projects.
I have a sabertooth 2x5A (claims 10A for a few sec is ok), would it be capable of running the 12V 1000RPM ebay motors if they stall at 10A as per Marto's information?
Sun May 22, 2011 4:51 pm
dyrodium Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
Heya,
This is Angus, I had that wedge mudkip yesterday. I usually run that exact controller with 4 x 1000rpm motors at 14.4v. It works flawlessly and gives excellent control. Best thing is if a drive does bind up, it will limit the current. _________________ ( •_•)
Beetle motors are 3A stall on 7.4V or about that. _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Sun May 22, 2011 8:58 pm
andrew
Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
hi,
I want to try and build an overhead axe weopon on a beetleweight.
The main thing stumping me is how to swing it tho.
Idea i had was to use 2 1000 rpm gearmotors or a slightly smaller ratio setup from a store on ebay but main issue is how to drive it.
Timing belts/pulleys would be ideal but getting the parts required is fiddly
Was thinking maybe chain drive but yeah
wanted to see what peoples thoughts are.
Thanks for any assistance _________________ Andrew Welch, Team Unconventional Robotics
Sun May 22, 2011 9:48 pm
Kenvs001
Joined: 04 May 2011
Posts: 66
Location: Sydney NSW
Hi
Could i please get an estimated recomended battery capacity for a bot fight. (Making a serious shopping list, for hopefully 1 big purchase)
Beetle with 4x 12V 1000RPM ebay motors as a ramming bot.
Ant with 2x 6V 400RPM ebay motors for a wedge or wedge / lifter.
Regards,
Ken
PS. Cheers Angus for the info on the Sabertooth. 1 less item to buy.
Mon May 23, 2011 9:45 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
quote:Originally posted by Kenvs001:
Hi
Could i please get an estimated recomended battery capacity for a bot fight. (Making a serious shopping list, for hopefully 1 big purchase)
Beetle with 4x 12V 1000RPM ebay motors as a ramming bot.
Ant with 2x 6V 400RPM ebay motors for a wedge or wedge / lifter.
Regards,
Ken
PS. Cheers Angus for the info on the Sabertooth. 1 less item to buy.
Probably would be fine with a 500mah lipoly for the beetle, 15-20c should do it. (my spinner one ran a 20c 500mah battery for reference )
Ant im not too sure, one of the qld'ers would be more qualified to say then i, but probably 300mah would be heaps. I got some 180mah cells for mine and its a two wheeled pushy bot. i think itll be alright. _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
For a rammer beetleweight try to get a four cell battery, that gives you 14.4v and that edge of speed, the motors don't mind the subtle over volting, I was considering pushing them even further... The smallest 4S pack I could find was 1000mah and way overkill, you could easily use two 2 cell 500mah packs in series though! _________________ ( •_•)
Also need higher than 400rmp motors for ant prolly too. _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Mon May 23, 2011 10:33 pm
Kenvs001
Joined: 04 May 2011
Posts: 66
Location: Sydney NSW
Batteries, 2nd reciever, 2nd Motor control are ordered. Just waiting on an update from the ebay fellow for combined shipping on the motors. Soon to building and the strange feeling im going to see my robots exploded everywhere.
Thanks all for the advise.
Mon May 23, 2011 10:46 pm
dyrodium Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
quote:Originally posted by Kenvs001:
Soon to building and the strange feeling im going to see my robots exploded everywhere.
If they didn't how would we be able to learn to make them better? Best of luck! _________________ ( •_•)
They are 60MM in diameter and around 10MM thick with a 3-4mm inner hole. I picked up a bunch of them at Mitre10 for $3ea, but there are probably cheaper places to get them.
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