Stepper motors offer many advantages. Although feedback is not usually required, stepper motors are compatible with feedback signals, either analog or digital. Error is noncumulative as long as pulse-to-step integrity is maintained by the step motor. A stream of pulses can be counted into stepper motors, and the final position will be known within a small percentage of one step.
For additional Stepper Motor technology and frame sizes, please visit the product pages of the ElectroCraft website, https://www.electrocraft.com/products/stepper/.