There are some HUGE servos for winchs and such, but too big I think.
My parts list:
1 x 5A Sabretooth
2 x MFA 100:1 motors
1 (maybe 2) 11.1v 1300mA Lipo
Speed 900 copy for a weapon motor.
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There are some HUGE servos for winchs and such, but too big I think.
My parts list:
1 x 5A Sabretooth
2 x MFA 100:1 motors
1 (maybe 2) 11.1v 1300mA Lipo
Speed 900 copy for a weapon motor.
http://www.active-robots.com/products/m ... tors.shtml
Are those lighter ones still a little heavy for beetleweights?
the ones gary linked are 780 grams so not suitable for a beetleweight i use 60g towerpro ones 4kg/cm torque. they're fine on flat surfaces but complain when you try to take them up a slight hill.
by the way kookaburra is currently not working due to it falling 1ft from a shelf :crazy: the servo horn snapped in 4 places, i'll investigate getting some metal servo horns or maybe invest in better motors+ speed control in future
Does anyone have a link to a good powerful servo that is also usable?
I'd say a 280g servo is perfectly usuable
http://www.giantcod.co.uk/9805bb-towerp ... p-177.html
I bought one of these recently, most likely to be used for the lifting mechanism in my Cassius replica. Not the fastest (although with the correct leverage/linkage it could be) but it's meaty as hell in the torque department. Weighs 160g and costs £12, can't go too wrong with it.
unless you let out the magic smoke genie by running it on 7.2v :rofl:Quote:
Originally Posted by k_c_r
i using two of those together for more torque :crazy:
my parts list(basicly the same as david westons)
2x 100:1 mfa como motors
12v 2600mah nimh
10mm thick hdpe(chopping board!)
40mhz radio gear.
got an old electic screwdriver motor which may end up being a spinner :proud:
Would any brushless motor so it?
And how re you connecting wheels to motors and how would you connect the spinner motor to the spinner?
a good sized brushless out runner would be fine for a weapon
my wheels are held on with araldite, probably not a good idea to mount the disc directly to the motor
I thing I may go with a drum spinner when I get round to it since it's not as hard to build as a disk
My Beetle is probably going to cost about the same as Bitza, but that's mostly due to weight issues. Most scrap parts are heavy!
My component weigh in leaves me with 600g. That's to include leads, connectors, mounts, pulleys and some sort of chassis to hold it all together....
Also my fisrt time using Li-Po and brushless.
Don't worry though, still upholds the Bitza motto! Bits of lawnmower are obviously included.
I use:
2x MFA motor (15:1) with 50mm wheels for drive
a 12ah sabretooth speed cotroler
lego pnumatics, with a deodrant can, or copper pipes for the cilinder
and 6mm hdpe for the body
and 1.5mm stainless steel for the armour
and I dont have a battery yet
but is there going to be an event? because if its going to the guildford event its getting quiet close :?
alex you dont really want to use lego pneumatics, there best in ants.
Try the ripmax air retracts we looked at...
Well the lego is only tempory untill I can afford better, and anyway from my calculations I can have 20lbs of force at the end of the flipping arm!
Just found this;
http://www.robotmarketplace.com/products/0-B62.html
Apparently very popular in Beetles in America and come in several gearbox ratio's. Good amount of torque, especially compared to the MFA's on Technobots and lighter.
Unfortunately gotta order form America, haven't looked to availability in England yet.
They are good, Ive got some for my beetle if I make it...tried them out on a test chassis and they were pretty good with a 20mm wheel. Kenny also has them now in the latest version of 180
Where did you get them? From RobotMarketPlace?
I can find the gearboxes in this country, but not sure what the motors are?
me and kenny just got them direct from Robotmarketplace...there P+P cost's arent as bad as everyone thinks... and there delivery time is quite good too.
So is there going to be an event soon? I know there was talk about taking the arena to the Guildford event, but havent heard much since.
Did customs give you any trouble?
Probably best if you have a beetleweight, just to take it along. If the arena's there, the arena's there. If not, you could always just run in a small section of the RR arena between shows or something.Quote:
Originally Posted by Bodge Job
There's many of these style motors on ebay atm,
http://cgi.ebay.co.uk/2-x-12V-DC-1000RP ... 51988931d6
Any use?
I've got a set of those in one I'm building atm. Not wired them up so can't say if they are good bad or whatever. They are a good size for kilobots and pretty easy to make brackets for (bend a bit of 2mm ali and drill the holes out) and the banebots wheels fit quite nicely onto them.Quote:
Originally Posted by typhoon_driver
i beleive some australian beetles use them
Nope- never had any problems with customs when ordering via RMP... They send parcels labeled as toys or replacement toy components apparently...that way customs don't really bother checking :)Quote:
Originally Posted by PJ-27
Awesome!
Been having a play around withe Team Cosmos KE calculator;
http://www.teamcosmos.com/ke/ke.shtml
(Had to use IE and a Windows machine, nothing else would work!)
And I get a calculation of about 6000 Foot Poundals and 280 Joules.
Firstly these numbers are any thing but arbitrary to me, they mean nothing. Are they any good? Can someone give me some scale?
Secondly I thought 1 Joule = 1 Newton-Meter but a foot pound is about 1.3 newton meters, which gives me a Joules calculation more like 8100?
Confused!
Poundals are a measure of force not torque (ft lb /s^2) so foot poundals are a measure of energy.
I believe Hypno-Disc put out 4kJ with every fully-spun disc hit, I can't remember whether this was in S3 or S4, but you saw how easily that tore apart Robogeddon, Stealth, The Predator, and most noticeably Splinter, and those were all around 80kg. 280J should be more than enough in a 1.362kg spinner. :)
could u use to of these as a cluster bot? http://www.robotmarketplace.com/product ... X8800.html
You probably could, but I saw one of those back at Barnsley and they are...not incredibly fast.
It has infra red control which although allowed in the rules will probably get a lot of interference from other light sources, is very slow, probably has no failsafes and will probably be smashed very quickly seeing some of the spinners being made.
So overall not worth the hassle to make it competetive.
What size is every bodys beetles?
Mine is 250mm long, 210mm wide and 80mm high.
192mm x 170mm x 30mm
oh good! that means my robot isn't as massize as I thought!
This is the first time I've built something then rebuilt it several times before ever competing in anything.. it better do well!
Yes I keep rebuilding mine as well, I'm all ready on my 2nd body and 3rd flipping arm
How on earth is everyone keeping their Beetle in weight!?
Gunna be a tight squeeze........