6A 2-Phase closed loop Stepper Drive with Full Position Feedback

6A 2-Phase closed loop Stepper Drive for NEMA34 Axes

The 6A 2-Phase closed loop Stepper Drive 2HSS86H-N applies full closed loop control to deliver servo-grade positioning without surrendering the simplicity of a stepper system. Rated for a 6 A maximum output current and a 30-100 VDC supply, with 24-75 VAC as an alternative input, it is sized for NEMA34-class motors that carry moderate to high shaft loads. Lyenwsin distributes this drive for industrial automation, packaging, and printing lines.

closed loop Control Architecture

Instead of relying on open-loop step counting, the drive closes the position, speed, and current loops around the motor. A missed step or a temporary load transient is detected and corrected in real time rather than accumulating into a positional error. The practical result is a holding behavior and load response closer to a servo axis while retaining a stepper’s cost structure.

Thermal and Efficiency Behaviour

Because the current loop is driven only as hard as the load demands, the drive runs cooler than a conventional excited stepper at standstill. Reduced heat generation lowers the risk of motor de-tuning, extends dwell-time reliability, and keeps EMI and acoustic noise comparatively low during operation.

Command Interface

The unit accepts standard pulse/direction step commands, so it drops into existing controller architectures that already generate step and direction signals. Input signal treatment, current set-point, and microstep resolution are configurable to match the motor and the machine cycle profile.

Key Specifications

• Output current: max 6 A
• Supply voltage: 30-100 VDC / 24-75 VAC
• Control mode: Pulse/Dir (step and direction)
• Feedback: full closed loop control
• Operation: high efficiency, low heat, low noise

Typical Applications

With acceptable torque and a compact footprint, the drive suits industrial automation, packaging and printing lines, compact CNC equipment, robotics, textile machinery, automated handling, and food processing where a robust single-axis drive must hold position reliably.

Selection Considerations

Match the motor phase current to the 6 A capacity and confirm the winding voltage constant works with a 30-100 VDC bus. For vertical axes, verify that the drive’s holding behaviour covers the load. Lyenwsin can provide matched NEMA34 closed loop motor and drive packages for a complete axis solution.