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Reuse the stepper and frame of DVD Player

fyaocn

1 Introduction

With previous g-code and grbl library, it is good for one CNC proto design with some handy parts .

Two dvd Player and ADI TM5272 shall be used in this case.

2 Stepper driver with ADI TM5272

Controlling with MKR wifi 1010 and driving stepper with ADI TM5272

image

The TMC5272 Evaluation Board (TMC5272-EVAL-KIT) is designed to assess the capabilities of the TMC5272, a compact, intelligent, and high-performance dual-axis stepper motor controller and driver IC. It features serial communication interfaces (SPI and UART) and comprehensive diagnostic functions, making it suitable for precise motion control applications.

Key Features & Advantages

  • Wide Power Supply Range: Operates from 2.1V to 20V DC, adapting to diverse power environments.
  • High Integration:
    • Includes four 20V H-bridges with low Rds(on) (0.31Ω typ. at TA=+25°C) for reduced power loss and heat.
    • Supports peak current per H-bridge: Imax=1.5A max, with full-scale current Ifs=0.8A rms (1.12A sinusoidal peak).
  • Silent & Smart Control Modes:
    • StealthChop 2: Enables noiseless PWM operation for quiet environments.
    • StallGuard 4: Sensorless load detection to monitor motor status in real time.
    • Tricoder: Sensorless stall detection and full-step encoder functionality for reliability.
  • High-Resolution Motion Control:
    • 8-point motion controller with minimum jerk (snap) control for smooth trajectories.
    • Auto 2D linear trajectory and axis interpolation; step/direction interface with MicroPlyerTm interpolator (up to 256 microsteps per full step).
  • Flexible Communication: SPI/UART interfaces for easy integration with microcontrollers. Includes two quadrature encoder interfaces and reference switch inputs for precise feedback.

3 Parts from Old DVD Player

Here is the frame got from two DVD players

image

Core Idea

DVD players contain high-precision stepper motors (for disc rotation and laser tracking) and linear guides (for moving the laser assembly). These components can be salvaged and adapted to build a low-cost CNC machine, in this case a 3-axis  plotter as the starter. It can be revised to router or mill.

Key Components to Salvage

  1. Stepper Motors:
    • DVD players typically use 2-phase hybrid stepper motors (e.g., for tray loading, spindle rotation, and laser positioning).
    • These motors offer fine resolution (e.g., 200 steps per revolution) and precise control, suitable for small-scale CNC movements.
  2. Linear Rails/Guides:
    • The laser assembly’s sliding mechanism often includes smooth linear guides or lead screws, which can act as CNC axis rails.
  3. Gears/Belts:
    • Gears or timing belts from the DVD drive can be used for mechanical coupling between motors and axes (e.g., for X/Y/Z motion).
      But I remove them for now.

Benefits of This Approach

  • Low Cost: Reuses discarded electronics, minimizing hardware expenses.
  • Compact: Suitable for small-scale projects (e.g., PCB milling, 3D printing, or drawing).

Challenges & Limitations

  • Power and Torque:
    • DVD stepper motors are small and low-power (often rated for <1A current). They may struggle with heavy loads or large CNC beds.

4 Next to do

This is proto type design for miniature plotter, including TE Connectors  to fit for the design.