I want to build 2 robot arms connected to a Raspberry Pi. My problem is that I do not want to make it small and use servo motors. I want to use bigger and more powerful stepper motors... therefore I don't find many tutorials on how to link 8 step motors and control them from a single Raspberry Pi.
I plan to use stepper motors like these (4 on each arm):
3 Nm - 30 kg-cm
https://www.amazon.com/Torque-Stepper-M ... B00PNEPW4C
2.4 Nm - 24 kg-cm
https://www.amazon.com/STEPPERONLINE-Cu ... B00PNEPKH6
2.2 Nm - 22 kg-cm
https://www.amazon.com/RTELLIGENT-Stepp ... B07WG56CN4
1.9 Nm - 19 kg-cm
https://www.amazon.com/STEPPERONLINE-St ... B077Z5QJCL
Note: I use the Raspberry Pi 4 (4GB). I have no problem buying another/s.