NEMA34 closed loop Stepper Motor With Brake – 7.5 N·m With Integrated 1,000 P/R Encoder

Higher Torque in the 86 mm Class

The 86J1895EC-1000-LS-SCG is a NEMA34 closed loop Stepper Motor With Brake rated at 7.5 N·m holding torque and 6.0 A phase current. Its 95 mm body and 14 mm shaft give it the stiffness expected from an axis drive in medium-sized machinery, while the integrated 1,000 P/R encoder closes the position loop. Lyenwsin supplies this motor as a complete closed loop motion solution for CNC and factory automation.

closed loop Control in Practice

Continuous Position Verification

An integrated 1,000 P/R incremental encoder reports rotor position continuously. In closed loop operation the drive corrects position error on every step, so the motor holds position without losing steps under varying load. Unlike an open-loop stepper, it does not need a large torque margin just to avoid stall; the feedback loop lets the axis work closer to its rated torque while the brake covers stationary loads.

Holding Brake for Safety-Critical Axes

The built-in brake holds the rotor when the drive is de-energized. This is the deciding factor for vertical axes on gantries and lifts, where a dropped load is not acceptable. Brake engagement is automatic on power loss, so the axis does not drift when the machine cycles or shuts down.

Performance Characteristics

• Phase type: 2-phase bipolar
• Frame size: NEMA34 (86 mm)
• Body length: 95 mm
• Holding torque: 7.5 N·m
• Phase current: 6.0 A
• Shaft size: 14 mm
• Integrated encoder: 1,000 P/R
• Brake: integrated holding brake

Suitable Applications

The motor fits CNC machine tools, packaging machinery, factory automation, precision robotic mechanisms, textile machinery, printing machinery, food processing, and automated handling mechanisms. On a CNC axis the 14 mm shaft and 7.5 N·m torque support direct coupling to a ball screw without an oversized gearbox.

Selection Considerations

Confirm duty cycle and worst-case static load before specifying. The 7.5 N·m figure is motor holding torque; the brake should be validated against the load it must hold with power removed. Matching the motor with a Lyenwsin closed loop drive ensures encoder resolution and brake sequencing are set correctly during commissioning.

Mounting and Thermal Notes

closed loop operation reduces continuous heat build-up compared with oversized open-loop drives running near stall. Mount the motor to a flat, thermally conductive surface, keep brake wiring away from the phase wiring, and follow the derating guidance in the datasheet when the ambient exceeds 40 °C. As your distributor, Lyenwsin can supply a full dimensional drawing and wiring diagram on request.