New STAC6-Q stepper drives feature Q programming, which offers options for downloading, storing, and executing multiple programs via a single drive. The devices offer current output from 0.5 to 6 A with 90 to 135 VAC input and 50/60 Hz. The drives provide software-selectable resolutions from 200 to 51,200 steps/rev at speeds of up to 133 rps. Capabilities include register manipulation, conditional processing, math functionality, and multitasking. The drives provide pulse and direction with electronic gearing, encoder following with electronic gearing, clockwise and counter-clockwise pulse, and the ability to host interface while executing internal programs. The drives include self-test and auto setup features to measure and configure motor parameters automatically. Anti-resonance technology is designed to eliminate midrange instability for high motor speeds and full use of available torque. Demand signal smoothing is said to reduce extraneous system resonances for smooth motor performance and reduced wear on mechanical components. The drive’s torque ripple smoothing feature adjusts the current waveform to reduce low speed torque ripple for smooth motion at low motor speeds. MicroStep emulation is said to provide smooth motion for systems that require low step resolutions. Such applications include retrofit systems with controller resolution that is fixed at a low value and cannot easily be changed.