MLAB
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HBSTEP01

Stepper Motor Driver Module based on L6470

This is an open-source hardware design, one of the modules from the MLAB labolatory system.

HBSTEP01 - Stepper motor driver

HBSTEP01B

The HBSTEP01 is a bipolar stepper motor driver module built around the STMicroelectronics L6470 chip. It provides a complete microstepping motor control solution with SPI interface, allowing for precise motor control and advanced motion features.

Features

  • Microstepping up to 1/128 steps
  • Operating voltage: 8 V to 45 V
  • Maximum output current: 3 A RMS (7 A peak)
  • Integrated non-dissipative current sensing
  • Programmable speed profiles and position control
  • Sensorless stall detection
  • Built-in motion engine with acceleration/deceleration control
  • Two levels of overtemperature protection
  • Overcurrent and undervoltage protection
  • SPI interface (5 Mbps max)

Typical Applications

  • Precision motorized stages
  • Robotics
  • 3D printers
  • Industrial automation

Electrical Specifications

Parameter Value
Supply Voltage (VS) 8 V to 45 V
Logic Voltage (VDD) 3.3 V or 5 V
Max Output Current (RMS) 3 A
Max Output Current (Peak) 7 A
SPI Clock Speed up to 5 MHz

Connectors and Interfaces

  • Motor Outputs: 4 terminals for bipolar stepper motor
  • Power Supply: VIN and GND (external 8–45 V supply)
  • Logic Interface: SPI (SDI, SDO, CS, CK), STBY, SW, BUSY/SYNC, FLAG

Control Interface

The module is controlled via SPI. The L6470 accepts a variety of commands:

  • Motion commands: Run, Move, GoTo, etc.
  • Positioning: absolute and relative
  • Speed and acceleration profile programming

Refer to the L6470 datasheet for detailed command structure and register settings.

Protections

  • Overcurrent detection with programmable threshold
  • Thermal warning and shutdown
  • Undervoltage lockout
  • Open-drain FLAG pin indicates fault conditions

PCB Dimensions and Mounting

  • Standard MLAB format
  • Mounting holes compatible with other MLAB modules

Resources