I am trying to build a robotic arm and also using a lot of metal in it, now the real challenge for me have arrised at first I was using tower pro mg995 but that servo is worse than scrap. So I ditched them and got myself Johnson geared motors. Now as long as I apply the voltage the motor running holds the weight and move it to the desired position but when current is shut down it drops it. Please help me understand the concept of holding torque or even how much duty cycle will be required to hold the motor in place. I am using external potentiometers for position feedback and have achieved accuracy with it. Also I have cut open the tower pro servo to use its gear mechanism and found it worked nice so I wonder if I could use them too. I aim to control 8 motors but for the time being struggling with just one. Please help. And one more question should I consider using L298N IC for the motor control and not build my own H-Bridges.
Thank you, you guys are awesome.