The stepIM NEMA 17 EtherCAT model is the latest addition to the family of integrated closed-loop servo stepper motors. The IP65-rated stepIM NEMA 17 delivers an efficient and economical solution for applications requiring the performance of a servo at the price of a stepper. It creates the ability to lose the cabinet and gain design flexibility in decentralized motion architecture applications, where space is a limitation and performance optimization is needed.
With a closed-loop servo control by Servotronix Motion Control, the stepper is available in three sizes:
- Short: 3.8 in. (97.4 mm) motor length
- Medium: 4.2 in. (105.9 mm) motor length
- Long: 4.7 in. (120.4 mm) motor length
The stepIM enhances the performance of stepper motors when compared to conventional open-loop control. The integrated electronics control the motor as a two-phase BLDC motor, implementing position servo loop, velocity loop, DQ current control, and additional algorithms. Closed-loop commutation, by means of an absolute single-turn encoder, ensures optimal torque use at any speed.
In addition, the closed-loop steppers support decentralized machine architecture by allowing machine builders to get rid of the cabinet and enhance motor performance with no step loss. The integrated design also minimizes component and wiring requirements. Further, it can function as distributed I/O points, reducing machine complexity.
- Sophisticated closed-loop control enhances motor performance with no step loss
- Operates in torque, velocity, and position modes
- Efficient torque use optimizes motor sizing
- Integrated design minimizes component and wiring requirements
- Reduced space, installation efforts, and system cost
- Fieldbus: CANopen DS402 & EtherCAT
- Synchronized control of coordinated motion profiles
- Reduced machine complexity, as stepIM can function as distributed I/O points
- Available in IP20 & IP65
- CE compliance
| 17S | 17M | 17L | |
| Input Power, Nominal (±10%) | 14 to 48 V DC | ||
| Aux. Input Power, Nominal (±10%) | 6 to 24V DC | ||
| Aux. Input Power, Max. | 1 W | ||
| Detent Torque | 15 mNm | 25 mNm | |
| Thrust Load Limit | 0.6 lb. (0.28 kg) | 0.8 lb. (0.36 kg) | 1.3 lb. (0.6 kg) |
| Overhung Load Limit | 20 N | ||
| Rotor Inertia | 57 g/cm2 | 82 g/cm2 | 123 g/cm2 |
| Holding Torque @ Continous Current | 0.35 Nm | 0.45 Nm | 0.65 Nm |
| Holding Torque @ Peak Current | 0.5 Nm | 0.6 Nm | 1.05 Nm |
| Continuous Output Current | 1.8 A | ||
| Peak Output Current | 3.5 A | ||
| Step Angle | 1.8-deg. | ||
| Magnetic Encoder, Resolution | 4,096 PPR | ||
| Circuit Loss | 6 W | ||
| Weight | 0.8 lb. (0.37 kg) | 0.9 lb. (0.44 kg) | 1.3 lb. (0.59 kg) |
| Operation Modes | Profile position, velocity, profile velocity, profile torque, homing, cyclic synchronous position | ||
| Display | LEDs | ||
| Software Tools | |||
| User Interface | ServoStudio, Windows-based | ||
| Functions | Connection settings, drive info, power info, I/O config., motion settings/tuning, fault history | ||
| Rotary Units | |||
| Position | Counts | ||
| Velocity | rpm/100 | ||
| Acc/Dec | rpm/100/s | ||
| Communication | |||
| CANopen | CANopen: CiA 301 application layer and CiA 402 device profile. Baud rate 10 kbps to 1 Mbps CAN ID 1 – 126 (Default 101) Heartbeat producer, SDO, PDO (dynamic mapping) | ||
| EtherCAT | CANopen: CiA 301 application layer and CiA 402 device profile. Communication cycle time: up to 250 µs | ||
| Protective Functions | I2T limit, over/under-voltage, drive over-temp., over-speed, velocity/position error, magnet missing, power stage fault, PLL lock lost, position command error, acc/dec violation | ||
| Standards | IP20 CE, IP65 CE / UL pending | ||
| Environment | |||
| Ambient Temp. | Operation: 32 to 104°F (0 to 40°C) Storage: 32 to 158°F (0 to 70°C) | ||
| Heat Sink Max. Temp. | 212°F (100°C) | ||
| Motor Max. Temp. | 248°F (120°C) | ||
| Operating Conditions | |||
| Protection Class | IP20 | ||
| Pollution Degree | 2 as per IEC 60664-1 | ||
| Configuration | Flange mounting | ||
