Servo types

mikev

Good morning. Does anyone know the name (type) of the servo used in bipeds? This servo seems to have an output shaft on both sides of the servo to mount brackets. I have searched all morning to no end. If they come from Hobby King or Cheapo servo.com the better. I have an intuition the may be in the 200-300 dollar range. Thanks for any replies.

Duane Degn

There are practically zillions of different servos.

Dynamixel is one manufature of "robot actuators".

Here's one place that sells them.

http://www.trossenrobotics.com/c/robotis-dynamixel-robot-servos.aspx

The don't use the normal pulse length many hobby servos use to command location. They use serial communication. They are very cool but kind of expensive.

I've only used Dynamixel's AX-12 servos myself.

I don't think Hobby King sells any of the servos you're looking for.

Publison

mikev wrote: »

Good morning. Does anyone know the name (type) of the servo used in bipeds? This servo seems to have an output shaft on both sides of the servo to mount brackets. I have searched all morning to no end. If they come from Hobby King or Cheapo servo.com the better. I have an intuition the may be in the 200-300 dollar range. Thanks for any replies.

Depends on the type and size of biped.

The Parallax Penquin used two $12.00 servos

and the Parallax Toddler used two $13.00 servos

http://www.robotinfo.net/penguin/

http://www.robotadvice.com/parallax-toddler_robot.html

Publison

Servo City is also a good source of servos.

http://www.servocity.com/

Duane Degn

Publison wrote: »

Depends on the type and size of biped.

The Parallax Penquin used two $12.00 servos

and the Parallax Toddler used two $13.00 servos

http://www.robotinfo.net/penguin/

http://www.robotadvice.com/parallax-toddler_robot.html

Jim, while the Penguin and Toddler are technically bipeds, I'm pretty sure the Mike was looking for the servos that allow rotation from both sides of the servo.

I think there's a robot called RoboNova that also use "robot servos". Some of these servos have a shaft that go all the way through the servo while others just provide a pivot point opposite the horn. Dynamixels use a pivot point.

I added my own pivot point with my popsicle stick hexapod by attaching Lego turntables to the bottom of the servos.

Duane Degn

HiTec makes some robot servos.

Publison

Duane Degn wrote: »

Jim, while the Penguin and Toddler are technically bipeds, I'm pretty sure the Mike was looking for the servos that allow rotation from both sides of the servo.

I think there's a robot called RoboNova that also use "robot servos". Some of these servos have a shaft that go all the way through the servo while others just provide a pivot point opposite the horn. Dynamixels use a pivot point.

I added my own pivot point with my popsicle stick hexapod by attaching Lego turntables to the bottom of the servos.

Duane,

I edited my original post to ask for an example of what he was trying to build, but the edit did not get posted for some reason.

Jim

Duane Degn

Publison wrote: »

Duane,

I edited my original post to ask for an example of what he was trying to build, but the edit did not get posted for some reason.

Jim

No problem here.

I'm guessing Mike is looking for something like a RoboNova but doesn't know that they're called.

I found a link to a RoboNova I.

Dynamixel also makes a humanoid kit.

I think I might have all the parts to build a humanoid with AX-12+ servos but I'd have to take the servos out of other projects to do so.

mikev

Thank you for the replies. I will check the leads.