I am in the design phase of building a robot arm roughly 40 cm long that can pick up several pounds ( 1 kg for easy math). To get a 40 kg-cm torque servo is a pretty expensive servo ($60 at pololu.com although anywhere else anyone knows something cheaper, please share!).
Has anyone ever tried to gang several servos of the same brand and type together to work in concert? I was going to put a balancing weight on the far end which will help, but still calls for a pretty expensive servo (30 kg-cm)
Any other suggestions, I would love to hear. Thanks in advance for the help.
Have you considered using stepper motors? You can get a set of 5 Nema 17s meant for a RepRap 3D printer and it wouldn’t be much more than the price of one of the servos you were talking about.
Something like this geared down 10:1 would give about 55 kg/cm of torque.
