Links+radio

[psycho_fling]

hi all

Im at the stage where i need to secure my link to something, my idea was ali plate riveted to the box section and the lonk cable tied to the plate, will this stand up in a battle? if not any other ideas?

also im having bit of trouble with my radio signal the motors pick up interference-i have read the thread about radio signal nd i have ordered some capacitors for all the motors

if i un wind the aerial and secure to the metal plate at the back, the the tip not touching the metal, will this aid my problem?

thanks alex

[geeza]

I glue my links together and then bolt them to ally plate with M2.5 machine screws.

As for an arial you will need something external, either a boat arial or tape it to the top/back of the robot, but this wont be as effective.

[typhoon_driver]

For a 40 meg system you need to have your receiver aerial poking out the robots chassis. Preferably as much of it showing as possible. It will get a far better reception if it is vertical. If you have to route part of it inside then try and keep it away from motors and power cables.

[woody]

Alex ,
Radio waves cannot get to the ariel if its enclosed inside a metal structure... It can find its way in thru something like wood or polycarb etc.
So if youve got any panels made of polycarb Id try taping the ariel to it.

on another post someone mentioned about the length of the aerial, being 80 or so cms but mines nowhere near that length-

its a hitec three channel reciever, would this be causing a problem?

thanks alex

[woody]

I doubt it ......did it cause problems before?

well it has alwas being twitching ever since i have used it, i was just thinking because mines only 20cms, but the one my dad uses is the technobots one which is so much longer

just thought it might be another cause

[psycho_fling]

also the aerial out of the rx has seen better days, its a bit ragged i do have something i could replace it with, just wondering if it would be adviable to change it? or should i leave it well alone?

alex

[woody]

By all means change it ... its only a bit of wire.
Id suggest you replace it with one double the length ...then you can chop it back to its original size if you need to.

Try a range test. Plug the rcv into a servo and get somone to walk away with the transmitter until you find a distance at which they can no longer reliably move the servo. If that distance is longer than the distance over which you need to control the robot, than your aerial (in fact your whole radio control link) is OK. If not, add wire up to a total length of 90 cm. At the same time, watch the servo for the twitching you refer to above. If it does not twitch, then the cause of that is somewhere else in your system.