Product Description:

The 6415-001-G-N-K microstep drive is produced by Pacific Scientific within the 6415 Microstep Drives series. It is a two-phase bipolar chopper unit that sits between a motion controller and a stepper motor, converting command references into regulated winding currents for precise incremental positioning in automated equipment. Selectable command formats allow the drive to serve in both velocity and position loops across packaging, pick-and-place, and semiconductor handling cells where smooth low-speed motion and rapid indexing are equally important.

Analog velocity or torque commands are accepted over a symmetric range of +10 Vdc to -10 Vdc; this span lets the controller reverse direction without reconfiguring wiring. The input terminal presents 20 kΩ of impedance, minimizing loading on upstream DAC outputs. Internally, phase current is pulse-width modulated at 20 kHz, a switching rate chosen to keep audible noise below the human hearing threshold while preserving current fidelity. The power stage tolerates bus voltages up to 75 Vdc, letting machine builders pair the drive with higher inductance motors that benefit from elevated voltage during acceleration.

System design must also account for the minimum supply level of 24 Vdc, because undervoltage will reduce the dynamic range implied by the earlier voltage limit. At the digital interface, step inputs can be clocked to 500 kHz, and each revolution can be subdivided into 51,200 Steps/Rev. This combination allows very fine positioning without sacrificing traverse speed. During fast moves, the current regulator can deliver up to 7.1 A for short intervals. Continuous delivery remains bounded by the 5 A rms rating, the 5.0 A DC input draw, and the 60 °C chassis ceiling set for cabinet design. All connections are brought out on a 25-contact female D-sub.