Servos for Wheel drives

[craig_colliass]

I have with my Spectrum radio, some small servos these are small units 7 grams I think. I was wondering if I could convert them into drives for an ant bot they have an identifier number S75 on them.

[woody]

Youll need to disconnect /remove the position feedback pot and remove any physical stops that prevent continious rotation.

http://www.google.co.uk/search?hl=en&q=rc+servo+hack&meta=http://www.google.co.uk/search?hl=en...rvo+hack&meta=


This is probably close to the size.

http://www.dprg.org/projects/1998-04b/index.htmlhttp://www.dprg.org/projects/1998-04b/index.html

(Message edited by woody on June 24, 2007)

[Gaseraki]

most likely 99% of servos can be modded. I have not seen inside of them but as long as the output gear is complete it should be able to be modded.

[john_frizell]

You will need a transmitter, a receiver, a receiver battery, two servos and some wheels. Modify the servos for continuous rotation (if you dont know what to do post here, people will help). Once the servos are modified attach some wheels (I use my sons lego wheels)and plug the servos into the receiver. With the receiver powered by its battery, the sticks on the tranmitter will make the servos run backwards or forwards. Thats it. Glue the servos down to a base of some kind and you have a robot. Fight it, rebuild it, fight it again.

Hi Michael, so much to say.

Firstly, check out http://www.robotwars101.org/phpBB/http://www.robotwars101.org/phpBB/
Youll find tons of advice there, you might also want to check out my advice on building an antweight in six easy steps at http://windisch.co.uk/robots/howto/build_a_robot.htmhttp://windisch.co.uk/robots/howto/build_a_robot.htm
(although the technology is a bit out of date now).
Look to spend about £150 for a decent robot plus specialist tools.

And finally, come along to a competition if you can. Reading Robot Club http://windisch.co.uk/robots/rrc/rrc13/index.htmhttp://windisch.co.uk/robots/rrc/rrc13/index.htm
is this Saturday and the next competition is near Hillingdon, West London on 17th November.

Simon

[john_frizell]

But if £150 seems a lot to you, you can probably build a working antweight, able to take part in competitions, for £30 or so. Get a used 27 mhz transmitter and receiver from a model car enthusiast or try the used shelf of a big hobby shop. Get servos from the same source. If all that fails, you can order a new 40 MHz transmitter with receiver, two servos and wiring harness from Technobots for around £40. The receivers you get this way will be big and clunky by ant standards but are fine to get you going and into competition with a first robot.

I agree, the robot kits I bought for a school club cost £60 each, although that didnt include a transmitter or battery charger, or crystals come to think of it.

SImon

I made robot kits out of a pair of Technobots transmitter/receiver servo starter kits that cost a bit under £40 each. The resulting robots were probably a bit over 150g but it didnt matter for the application and it would have been possible to bring them in under 150 g. The only mods needed were to fix the servos for continuous rotation and to make a battery pack that takes 4 AAA to replace the one supplied that took 4 AA. The Technobot kits come with a set of crystals.

The skysport 4 Technobot sells for gbp 34,96, 2 standard S3003 servos is 8 pounds each, so you would have 51 pounds for an antweight pushbot, or 59 pounds for a antweight with servo lifter or axe.