Stepper or servos, whats the difference?
The axis motor drive types on the market are called stepper and servos. Servos are more accurate than steppers and cost much more. The true servo system strength is that the system checks its position at each move against an independent measuring device, such as a glass scale. This is a closed loop system. Steppers are open loop systems executing a chain of commands without checking their position against an independent device. There is no question that servos are more accurate, however, steppers could be adequate, it depends on how repeatable and accurate your final product needs to be.
