Makerbase MKS AS5047P - 14-bit Magnetic Encoder SPI/ABI

Description

The MKS AS5047P magnetic encoder module from Makerbase is designed for contactless measurement of motor shaft angular position over a 360° range. The board features a 14-bit AS5047P magnetic sensor, providing 16,384 distinguishable positions per revolution, corresponding to an angular resolution of approximately 0.022°. The encoder is suitable for closed-loop control of BLDC, PMSM and stepper motors, including systems using Field-Oriented Control (FOC). It can work with appropriately configured ODrive controllers, SimpleFOC-based systems and compatible Makerbase MKS XDRIVE controllers, provided that their interfaces and electrical specifications are compatible.

Position measurement is performed by detecting changes in the magnetic field generated by a diametrically magnetized magnet attached to the rotating motor shaft. Contactless measurement technology eliminates the need for a mechanical connection between the sensor and shaft, allowing the motor position and direction of rotation to be monitored. The AS5047P sensor uses Dynamic Angle Error Compensation (DAEC) to reduce dynamic measurement errors caused by signal processing delays. The sensor manufacturer specifies operation at rotational speeds of up to 28,000 rpm. Proper installation requires accurate alignment of the magnet axis with the sensor and an appropriate distance between the components.

The module provides an SPI interface and incremental ABI (ABZ) outputs for connection to various motor controllers and microcontrollers. The SPI interface enables 14-bit absolute angular position readings and configuration of selected device parameters. The ABI interface generates quadrature A and B signals and an index pulse I, used to determine rotational displacement and speed. The AS5047P IC also supports configurable UVW commutation signals and a PWM output. Signal connections are available through a dual-row 16-pin connector, which also provides power supply, ground, and CSn, CLK, MOSI and MISO signals.

The MKS AS5047P-TS_EK_AB V1.0 board supports 3.3 V or 5 V DC power supply, depending on the selected voltage configuration on the board. For SPI communication, the manufacturer illustrates a connection using a 3.3 V supply, while the ABI connection example for ODrive includes the possibility of using 3.3 V or 5 V. Before connecting the module, the supply configuration, controller logic levels and connector pinout must be verified. The module does not directly control motor windings and requires an external motor controller.

The PCB is designed for mounting near the motor shaft using four mounting holes. The AS5047P sensor is positioned in the central area of the board to facilitate alignment with the magnet. Applications include robotics, automation, CNC drives, positioning mechanisms and servo control systems. Projects using ODrive, SimpleFOC or MKS XDRIVE require selection of the appropriate communication interface and configuration of encoder feedback in the motor controller software.

Features

• Technical specifications
  • Model: MKS AS5047P
  • Manufacturer: Makerbase
  • Sensor IC: AS5047P
  • Device type: magnetic rotary encoder
  • Measurement technology: contactless magnetic field sensing
  • Angular position resolution: 14 bits (16,384 positions per revolution)
  • Angular resolution: approximately 0.022°
  • Measurement range: 360°
  • Supply voltage: 3.3 V or 5 V DC
  • Maximum rotational speed of the AS5047P IC: 28,000 rpm
  • Dynamic angle error compensation: DAEC
• Interfaces and signals
  • Digital SPI interface
  • Incremental ABI outputs (A, B, I/Index)
  • Configurable UVW commutation signals
  • PWM output support
  • SPI signals: CSn, CLK, MOSI, MISO
  • Programmable ABI output resolution
  • Configurable zero position
  • 2x8-pin signal connector
• Compatibility and applications
  • Compatible with appropriately configured ODrive controllers
  • Support for systems using the SimpleFOC library
  • Integration with compatible Makerbase MKS XDRIVE controllers
  • Shaft position measurement for BLDC, PMSM and stepper motors
  • Suitable for FOC and closed-loop motor control systems
  • Contactless position measurement using a diametrically magnetized magnet
  • Four mounting holes
  • External motor controller required for motor control

Kit Includes

• 1x MKS AS5047P magnetic encoder module
• 1x 2.54 mm 2-pin jumper, black
• 1x 2.54 mm 2-pin jumper with 13.5 mm extended handle, red
• 1x encoder magnet, 6 x 2.5 mm
• 1x 2.54 mm right-angle 1x3-pin header
• 1x 2.54 mm right-angle 2x8-pin header
• 1x 2.54 mm 2x8-pin header with bent pins