Stepper Servo Motors
42 Stepper Servo Motor
42 mm flange closed-loop stepper servo · encoder feedback · CANopen CiA402 + Klipper dual-protocol direct drive
A closed-loop stepper servo built on a 42 mm (NEMA 17 compatible) two-phase hybrid stepper motor with an integrated encoder and drive electronics. Eliminates the step loss of traditional open-loop steppers while significantly reducing low-speed vibration and temperature rise. Natively supports all 8 CANopen CiA402 operating modes and Klipper firmware, optimized for 3D printers and desktop PNP(pick-and-place) machines.
- Flange
- 42 mm / NEMA 17
- Holding torque
- 0.6 Nm
- Closed-loop feedback
- 14-bit magnetic encoder
- Protocol
- CANopen · Klipper
01 Features & Advantages
Why choose 42 Stepper Servo Motor
- 01
42 mm standard flange — drop-in replacement for NEMA 17
- 02
Encoder closed-loop control — no step loss, position never lost
- 03
Native support for all 8 CANopen CiA402 operating modes (position / velocity / torque / homing / interpolation / cyclic sync)
- 04
Native Klipper firmware support — plug & play in the 3D printing ecosystem
- 05
Dynamic response optimized for 3D printer extrusion / motion axes and PNP(pick-and-place)
- 06
Homing without limit switches
02 Technical Specifications
42 Stepper Servo Motor
※ Ratings are typical values at 25 °C ambient temperature; see the datasheet for detailed tolerances.
Motor Parameters
| Mounting flange | 42 × 42 mm (NEMA 17) |
|---|---|
| Phase count | 2 |
| Step angle | 1.8° |
| Holding torque | 0.6 N·m |
| Rated current | 2.5 A |
| Phase resistance | 0.9 Ω |
| Phase inductance | 1.6 mH |
| Rotor inertia | 0.072 kg·cm² |
| Body length | 47 mm |
| Detent torque | 0.6 N·m |
Closed Loop & Servo
| Encoder | 14-bit magnetic encoder (16384 CPR) |
|---|---|
| Control algorithm | FOC field-oriented control |
| Current loop frequency | 20 kHz |
| Control modes | CiA 402 · 8 operating modes |
| Step-loss detection | Closed-loop correction + step-loss alarm |
| Communication interface | CAN 2.0B (CiA 301) |
| Firmware update | CAN online update |
Mechanical & Interface
| Shaft diameter | Ø5 mm (with 4.5 mm flat, anti-rotation) |
|---|---|
| Front shaft length | 24 mm |
| Motor weight | 0.35 kg |
| Wiring | XT30 (2+2) PB-M connector × 2 |
| Differential signal lines | CAN_H / CAN_L |
| Power lines | VIN / GND |
| Daisy chain | Supported · multi-device serial (daisy chain) |
Electrical & Environment
| Rated voltage | 24 … 48 V DC |
|---|---|
| Max motor voltage | < 52 V DC |
| Operating temperature | −10 … +50 °C |
| Positioning | Desktop consumer grade |
Operating Modes · CiA 402
| PP | Profile Position |
|---|---|
| PV | Profile Velocity |
| PT | Profile Torque |
| HM | Homing |
| IP | Interpolated Position |
| CSP | Cyclic Synchronous Position |
| CSV | Cyclic Synchronous Velocity |
| CST | Cyclic Synchronous Torque |
03 Model Naming
Model Naming Rules
Closed loop is standard from factory; specifications per the shipping datasheet.
05 Dimensional Drawings
Mounting Dimensions
UNIT: mm
07 Typical Applications
08 Related Products
Tubular Linear Motor
Ironless tubular · magnetic-scale closed loop · CANopen CiA402 + Klipper dual-protocol direct drive
- Structure
- Ironless tubular
- Feedback
- Magnetic scale + encoder
- Protocol
- CANopen · Klipper
- Effective travel
- 300 / 400 / 500 / 600 mm
USB-CAN Adapter
Two-in-one: CANopen master | USB-CAN bridge
- Function 1
- CANopen master
- Function 2
- USB-CAN bridge
- Interface
- USB 2.0 + CAN 2.0B
- Baud rate
- 50 kbps … 1 Mbps