You could buy Billy's 15A electronizes in the for sale section, I am sure he would be able to give you a good deal and like everyone sad they are more rugged than the sabertooth but oth are good controllers.
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You could buy Billy's 15A electronizes in the for sale section, I am sure he would be able to give you a good deal and like everyone sad they are more rugged than the sabertooth but oth are good controllers.
ok but i dont want to pay more than 55 quid
you could also make him an offer on the gimson motors and wheels he has viewtopic.php?f=166&t=5020
would be cheaper than buying the parts separately
Imagine you have 2 speed 900 copies. Even using the simplest drive you can build, a single stage mod 1, any idea what the large gear will cost?Quote:
Originally Posted by lewisantweight
Gimson GR01's come in 2 flavors. 9.6V and 14.4V. 12V is nicely in between.Quote:
i will use 12v as that is what they are.
Going to overvolt the 9.6V units, or undervolt the 14.4V motors?
I can't find anything cheap concerning a charcoaled speedo.Quote:
i am using a sabertooth ,even though you are all saying not to, as they are cheapest i can find and i dont have to pay postage, i will collect them.
Opting for smaller motors ain't a shame you know.Quote:
My robot will look stupid from the side with a wide diameter chasis but really small motors but i guess if i used anything else i would muck it up.
When weight is an issue, and you have to make a choise between 2 kg of drivetrain, or 1.3 kg....
I think you are underestimating the power and speed that a drill sized motor can pump out. Takes a heck of a lot of torque to drive a screw clean into a piece of wood (try it manually with a screw driver) whereas a cordless drill will handle that easily using a crap set of batteries in the drill.
Build the first one and use it as an experiment to learn about building bots.
Another option for a speed controller on the cheap is to look at the marine controllers from mtroniks. These were used in the lightweight and featherweight typhoon bots on the drive system to great effect as long as you don't exceed the 12v spec on them.
http://www.ebay.co.uk/itm/Mtroniks-Vipe ... 33715abd32
I'd just advise some caution about using certain hobby style controllers as there is a big divide amongst the good and bad. Basically you get what you pay for.
i will get the gimsons, and am probably buying an electronize esc and would it make any differance to the speed that the diameter of the wheels is the size of an a4 piece of paper vertically.
yes it will make a massive difference. if you think about it the motor will always rotate the same number of times in a minute but if you put on bigger wheels the circumference is longer so it will travel further for every rotation. so by having bigger wheels it will make you much faster but you will be left with much less power and with 300mm diameter wheels you probably wont even have enough power to move.
i think you could get away with 150mm wheels which jonny used in barnsleybot but it will be quite hard to control.
i suggest either going for smaller wheels or you will have to find some different motors with a lower rpm (revolutions per minute) or will have to go for a homemeader gear box which i dont think you should do for your first robot.
i will get smaller wheels. :crazy: :crazy: :crazy: :?:
Hells Angel drives quite nippy on 80mm blue wheeled 14.4V Gimsons fed 18.5V from a 5S 5000mah pack trough an Scorpion XXL Ilyama version. (theoretical speed 12kph, but looks a lot faster)
Hannibalito 4 seems quite happy with the 170mm wheeled 9.6V GR01 units powered from a 3S pack trough a smaller, cheaper Scorpion XL v1 (19kph)
if anybody has useful links that would be great.