PMM20 Integrated DC Servo Motor

PMM20 series CANopen&RS485 integrated low voltage servo motor is servo products independently developed by NiMotion. This product is based on a highly integrated one-piece development concept, integrating permanent magnet synchronous motors, multi-turn absolute encoder, servo drives, controllers and digital I/ O. It adopts FOC field-oriented control technology and drive-control integrated technology, and is controlled by CANopen and RS485 communication buses. It features a small size and simple wiring.

Product Features

• Fault alarm

• Bus Communication

• Multiple control modes

• Compact

• Highly integrated design

• 17-bit magnetic encoder (multiple turns optional)

• Soft Limit Function

• Curve Planning

• Vibration suppression

• Integrated micro servo motor

Ultra-small size, powerful performance

The product is sophisticated and compact, with a base width of only 20mm. Light load, high response, especially suitable for all kinds of compact equipment, such as pipetting workstations, semiconductors, mounting machines and other automation equipment.

Highly integrated design

Integrates Permanent Magnet Synchronous Motors, Multi-Turn/Single-Turn Absolute Encoders, Servo Drives, Controllers, and Digital I/O into a single compact unit, so no external drive is required. Compared with conventional separated solutions it saves considerable installation space, needs less wiring, and makes commissioning and maintenance easier.

Advanced Drive Algorithm

Adopts FOC (field-oriented control) and SVPWM for smooth torque output, excellent low-speed performance and lower operating noise and vibration.

High Precision Encoder Feedback

Built-in B: 17-bit encoder; D: 17-bit multi-turn absolute encoder (external battery) provides real-time position and speed feedback for more accurate closed-loop control; multi-turn absolute counting and automatic position storage on power loss mean no re-homing is needed after power-up.

Multi-bus communication support

Supports CANopen and RS485 communication, allowing quick connection to mainstream PLCs, motion controllers and host systems, with flexible networking and easy expansion.

Multiple Control Modes

Supports multiple control modes and standard CiA 402 motion modes (PP, PV, HM, CSP, etc.), switchable via fieldbus, pulse train, analog input or digital I/O to suit different host systems.

Digital Inputs / Outputs

Built-in digital inputs and outputs (DI/DO) that can be configured for enable, forward/reverse limit switches, home sensor, alarm output, brake control and more, allowing direct interfacing with sensors and PLCs without additional I/O modules and simplifying field wiring.

Integrated High-precision Encoder

An integrated high-resolution absolute encoder provides real-time rotor position and speed feedback for full closed-loop control. Multi-turn absolute versions store the position when power is lost, so no re-homing is required after power-up, giving more accurate positioning and smoother low-speed operation.

Homing and Origin Setting

Multiple homing (origin return) modes with configurable homing direction, speed and origin offset, allowing the mechanical origin to be re-established quickly after power loss or an abnormal stop and ensuring repeat positioning accuracy.

Gain Switching

Several gain sets can be stored and switched, with online auto-tuning available. Gains can be changed automatically or manually according to load inertia and operating speed, balancing fast response with smooth low-speed operation for quicker commissioning.

16-segment Position / Velocity & S-curve Planning

A built-in 16-segment position and velocity instruction function combined with S-curve acceleration/deceleration planning enables smooth multi-point positioning with reduced start/stop shock and mechanical vibration, improving cycle time and motion smoothness.

Resonance Suppression

Resonance suppression automatically identifies and sets mechanical resonance frequencies and uses notch filtering to suppress mid- and high-frequency resonance, reducing operating noise and improving positioning stability and path accuracy.

Low-frequency Vibration Suppression

Low-frequency vibration suppression compensates the residual sway of long arms, belts and other flexible loads, giving faster settling and more stable positioning in high-speed point-to-point applications.

Application in Wafer Probe Station Equipment

The integrated servo motor with a 20mm flange is one of the standard specifications among the world's smallest micro servo motors. With its ultra-compact size, light-load capability, fast response, and precise closed-loop control, it integrates a driver, controller, encoder, and I/O modules, while supporting both single-turn and multi-turn absolute magnetic encoders. It is specifically designed for precision equipment with extremely limited space, ultra-light loads, and demanding requirements for high speed and high responsiveness.