Stepper Motors
From HansenCorporation

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/.