I found that you sell the high tech 805bb high torque servo, but need one a bit more powerful, do they sell the same size servo that can torque up to 50 pounds? I might need to use some dc motors instead.
Thank you. For my project i am not sure as to what the overall entire finished weight/mass of the robot will be. I plan on keeping it fairly light. For most of the joints, i will use a more powerfull servo, than its actuall max torque for the robots mass/weight on a limb. I am building an Android, and it will be somewhat close to 6ft tall, the question i had was for the ankle joints/motors. At standing position when battery is connected, the robots max weight will be mostly at the feet(such as a human). i am going to construct it out of light but strong material. It will not always be at standing position, but would like it to acheive this. I presume the entire mass/weight of the robot/Android will be somewhat at 50pounds.
i might even have to make the first prototypes ankles strongly articular, or completely static, but i will look into Dc motors with an encoder.
Servos are rarely meant to handle significant loads. Some Robotis Bioloid servos (which are non-standard sizes) are able to handle 28kgf-cm and 68kgf-cm respectively. However, just like DC Gear motors, they are not meant to handle the maximum torque for extended periods of time.
As you indicate, to obtain higher torque you will need to use a DC Gear motor with encoder, or if you application permits, a linear actuator (which can be used at a distance from a pivot for rotatry motion). 50 pounds is as “weight” (or a mass) as opposed to a “torque”; if you are looking to use the servo to lift 50 pounds, you are best to use a linear actuator. Hope this helps.