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View Full Version : Servo and Batteries Selection!!! HELP ME!!!



dragonss
03-16-2010, 07:35 PM
I am attempting to build a WiFi based surveillence robot.
My current robot parts are weighing around 1.2 kgs (excluding the motors and batteries)

I need atleast two batteries
---- a 12v for my IP camera and Ethernet to serial converter
-----a 5v battery for my Wireless bridge and serial servo controller

Which continuous rotation servo motors should I use?
Also which corresponding batteries should I use for them. Please also help me with battery selection for above two batteries.
Please keep the battery weight and motor weight in mind while advising.

Thanks

allbits
03-16-2010, 07:52 PM
I am attempting to build a WiFi based surveillence robot.


Which continuous rotation servo motors should I use?
Also which corresponding batteries should I use for them. Please also help me with battery selection for above two batteries.
Please keep the battery weight and motor weight in mind while advising.

Thanks


No idea!!

You have not mentioned where you plan to use the servos. I can make obvious assumptions, but that will lead to a long thread and in the end you will mention the continuous servos were meant for something else.

Elaborate a bit more on the project. People might be able to help you more in that case.

dragonss
03-17-2010, 08:07 AM
Oh Sorry allbits,

I guess I was too excited for my own good at the fact that I would really be getting help.

I will elaborate-----

I need the servos for movement (locomotion of my robot)...
I am planning on a two wheel differential drive system.

I am going to setup an adhoc Wifi network with the help of my WiFI enabled Laptop and the bridge on the robot.
Then I will use the serial signals to control the servo controller.
The servo controller is serial based. I am using a Ethernet to serial converter to convert signals from bridge to RS 232 port of serial servo controller.

akshay66
03-17-2010, 08:31 AM
For servos:

http://robokits.co.in/shop/index.php?main_page=index&cPath=2

or

http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2&products_id=227

According to me both can do the work but its upon you.Both of them can be modified for 360 degree ie complete rotation.Toque is also good.

For batteries:
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=13&products_id=225

or

http://robokits.co.in/shop/index.php?main_page=product_info&cPath=13&products_id=226

Second would be better but its weight is 264 gms & the first weights 175gms.

Else your idea of wifi with serial servo controller is perfect.

dragonss
03-22-2010, 08:02 PM
Thanks akshay and allbits.

I am very grateful to you for your help.

akshay66
03-22-2010, 11:03 PM
Your Welcome!!!

allbits
03-23-2010, 08:57 AM
You do not need a quarter scale servo if your robot is not heavy (You did not specify the weight.). Use a standard servo @ 5Kgcm torque.
Modified servos will have high torque, but at the cost of speed. Speed IS bad.b You might want to use a wheel with a bigger dia.
I would suggest you to use zigbee to make things simple, at the wireless side.

dragonss
03-23-2010, 12:13 PM
Thanks allbits,

I mentioned the weight of my robot in the first post itself. It is 1.2 kg (excluding the motors and batteries).

Also it would be great if the robot is slow. It would help me study its movement and the controlling would be easy.

And i have to use WiFi bridge, because that is the main part of my robot.------I am creating a WiFi controlled robot.

akshay66
03-23-2010, 12:59 PM
Best of Luck!!

allbits
03-23-2010, 09:08 PM
oops dragon... i guess i went through the first post in a hurry that i didnt see you mentioned the weight.

you can use a futaba s3003 or a hitec HS322 or even 311. If you might add weight in future, use HS475.
I dont know much about other brands, but yes, they will be cheap and will serve the purpose.
and yes, good luck.