ECOSTEP 34S80-0850, high torque NEMA 34 servo motor
Technical specifications
| Flange | 86 mm |
| Max. DC link voltage | 150 VDC |
| Maximum speed | 2000 rpm |
| Peak torque | 5.8 Nm |
| Stall torque | 5.8 Nm |
Overview
The ECOSTEP 34S80-0850 is a high-torque servo motor in the ECOSTEP 34S series, designed for compact axes requiring strong torque at moderate speeds. With a motor length of 152 mm, a shaft diameter of 12 mm, a mass of approximately 4 kg, and a motor inertia of 0.27 × 10⁻³ kgm², it delivers substantial power density.
Operating at a 150 V DC link, the motor provides 3 Nm rated torque at 500 min⁻¹ and up to 5.8 Nm peak torque. Rated power is 158 W with speeds up to 2500 min⁻¹, supporting demanding motion profiles. The design follows the ECOSTEP principle of power based on torque. A 0.68 Nm/A torque constant, low winding resistance of 0.19 Ω, and inductivity of 1.3 mH facilitate responsive current control. Standard protection is IP40, with an optional IP65 housing available (shaft gland remains IP40). Load capacities up to 180 N (axial and radial) and various mechanical options allow adaptation to diverse mechanical layouts.
Advantages
The ECOSTEP 34S80-0850 supports torque-intensive servo axes where compact size and economical performance are critical.
- When high torque at low speed and precise control are required, ECOSTEP motors provide a cost-efficient alternative to traditional servo motors.
- High torque density:3 Nm rated and 5.8 Nm peak torque allow powerful rotary motion in a compact package, supporting direct drive concepts in many applications.
- Direct drive capability: High torque output can often eliminate external gear stages. This simplifies mechanics and reduces backlash and wear points for more precise positioning.
- Application flexibility: Encoder options, holding brakes, mechanical variants, and customer-specific winding adaptations allow the motor to be matched closely to the required operating point and control concept.
Where it fits
The ECOSTEP 34S80-0850 fits demanding automation tasks that combine high torque requirements with limited space.
- Main rotary axes in packaging and process machinery where format changes or indexing require high torque at moderate speeds
- Positioning and clamping drives in special machinery where direct coupling to screws or levers reduces mechanical complexity
- Heavy-duty handling and transfer units that move larger workpieces or tools and benefit from a compact but powerful servo drive
- Axes in test, assembly, or forming equipment where reproducible torque and accurate speed control are required over long operating times
Interfaces
The ECOSTEP 34S80-0850 is designed for straightforward integration into JAT drive systems with up to 170 V DC link.
- Encoder systems:
- Incremental: ABN encoders from 8,000 to 160,000 inc/rev
- Absolute: BiSS-B with 17-bit single-turn and 12-bit multi-turn
- High resolution: SinCos and combined absolute plus SinCos options for precise feedback
- System integration: Optimized for the ECOVARIO 214 servo amplifier, which supports precise current and position control at the specified voltage.
- Accessories: Mating connector sets and cables for motor, brake, and encoder (rated for trailing applications) help standardize wiring and support reliable commissioning.
