new robot builder

[Thunder arrow]

dumb Q
how do u charge a receiver battery?
do u need a receiver battery

theo

[calumco]

its not a dumb question......

but with a charger - my main bettery charger i use to charge my battery packs with has a plug for a reciever battery to get charged built in, or you can just buy a reciever battery charger

and most speed controllers can power your reciever so you dont need one, but some people prefere to have their reciever running off its own battery, i no jamie- (drumroll) used to

[Thunder arrow]

thanks my speed controller came 2mins ago its a Sabertooth dual

[calumco]

ah coolness , The 25A one? i used to use those i've got 2 sat in their boxes not doing anything lol

i kept having problms with them used to have 3 but i blew one with little hitters help, then i started using toms scorpion which works well- tom ill give it you back eventually :P - im just gonna get scorpions from now on

wen i used the sabertooths i powered my reviever off it aswell, it just saves the effort of having to sort the reciever battery out

[Ellis]

Flippers are pretty costly and very complicated. It's not really as simple as sticking a ram onto a hinged piece of metal, everything has to be thought out. Experience is a must have. That said, there's only one way to learn, right?

I think a good idea is to build a simple first robot, leaving enough space and weight to add a flipper later on, going for a pneumatic flipper robot first time is quite ambitious, and you might decide half way through the build you aren't happy or you no longer want a flipper, meaning you will have spent a lot more money than was necesarry.

Another thing is, a well angled scoop/ramp/wedge can flip other robots over if your robot has the speed and power to push them or hit them hard enough, or another option could be an electric linear actuator (I've heard they're pretty cheap, I might be very wrong though), they aren't very fast or powerful for that matter, but I think I also heard somewhere they can lift 30kgs? If that's the case (again, don't take my word for it) then a 13 or so kg robot shouldn't be a problem (taking into account the power lost in a hinge mechanism and the lengh of the lifting arm etc).

I'm just starting too tbh, all I just wrote might well be cobblers, so have someone more experienced than I tell you what's what, I'm just going by what my common sense is telling me, lol.

[psycho_fling]

most linear actuators shortened to linacs are rated in newtons they will have a different value for push and pull

you can little ones or bigger ones like mine which can push about 1000kg at the end but in my crusher due to pivot points and distances it works out to be about 700kg on the tip

ebay is good for them and cheap

alex

[Bodge Job]

thx again, il look at it but i will proberly go with a pneumatic flipper

pneumatic flippers cost alot more than most robots, even if you get most parts free form other robot builders you still could not aford it. It is also very hard to build a pneumatic flipper as hard time found out, I would go with a rambot or pusher with a wedge then add an eletric liffter later.

ps some rambots can still cost over £300 or more.

[Thunder arrow]

thx again but where can i get metal sheets from in norfolk or on the internet