@bret.tallent That is just so cool! You should make official drawings and come up with a kit to sell for all who are modifying their own B9. What servo torque will be required for the shoulder? How is the claw design coming along?

Wow man, I like that this thread does not remain forgotten, while others encourage their ideas. My arm robot RSP unfinished, is four degrees of freedom (more humanoid hand that will work with just two servos) The degrees of freedom are: -Shoulder -Elbow -Wrist Wrist-rotation

Very clever arm design R2D2. What servos are you using for shoulder and elbow? Definitely want to see a video of this arm in action!

Thanks rgordon :the shoulder servo that is not in the picture because I have not yet purchased, will be this:

SPG805A-BM

The servo that moves the elbow with a steel rod that is mounted on the shoulder to act as a counterweight is this:S8166M

The servo that drives the rotation of the wrist or forearm and still not mounted servo is a Futaba S3003 or maybe a s3004 (with bearings) and will work with a gear of 100 teeth servocity, pulling out the potentiometer to the shaft and coupling forearm rotation

The servo wrist moving up and down function with a steel rod acting on the hinge and it is this:

TGY1501

I delayed the most of the location of the servos to delay the center of gravity of the lever arm is the minimum. greetings.

THanks Rex! I am using an MG995 servo for the rotation. It doesn't really need that much torque but it is what I had lying around. I am currently working on the claws and rubber cover. I will post more video as I progress.

i am using higher torque servo (my design) for my arms on my omnibot 2000 project inside the arms will have aluminium,it best stuff to use for robots,easy to machine and add boards or servos and to remove them,and soon setting up a special MIG WELDER to weld aluminium,needs a high output MIG welder,plus a special mig welder feeder gun made for aluminium with gas input,and argon gas for shielding gas,also on order is a metal lathe and mill machine work out my design to lift over 50 lbs ,more like the bionic arm in 6 million dollar man movie project is called 6 million dollar omnibot lot of times i make my own servo's its pretty easy all you need is the futaba s3003 servo and remove the board and pot and motor ,and add your own motor and gear box and add the pot for feedback,now on the h-bridge on s3003 board it rated at 1 amp,so 2 in parallel gives you 2 amps or remove it and add your own h-bridge for gear box kinda easy to work it out,just need specs on motor you are using,speed and torque and torgue you want out ,then gear ratio is kinda easy if like example you need a 4 to 1 ratio, and want to use the smallest pinion gear for the motor like 9 teeth output gear would be 36 teeth,reason for a small pinion gear is that the output gear is small to fit inside your design or get a little harder like in servo are made with a few gear ratio's, now with a 4-1 ratio speed will be 4 times less and torque 4 times more

rgordon and soon will modify robot hand with aluminum and two servos like this:

i have a hand like that as a template for my aluminium hand design,one main reason a lathe and mill machine is very needed plastic hands makes a great template