3D Printer – Stappenmotor aansturing module (DRV8825)

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Stappenmotor aansturing module
DRV8825

Hardware
Stappenmotor aansturing module DRV8825 bovenkant   Stappenmotor aansturing module DRV8825 onderkant

DRV8825 is een complete microstepping motor driver met ingebouwde “omzetter” voor een eenvoudige bediening. De v kan in vol, half, 1/4, 1/8 en 1/16 stap modi bipolaire stappenmotoren besturen, deze module werkt vanaf 8 V tot max. 35 V en kan 1.5A leveren per fase, en zelfs tot 2.2A indien gekoeld met een heat sink.

Deze modules (ook wel Polulu drivers genoemd) worden veelal geplaatst op Arduino Shields geschikt voor CNC en 3D Printing, zoals de RAMPS 1.4

RAMPS board met polulu drivers DRV8825

Het verschil is dat deze driver iets meer stroom kan verdragen dan de A4988 driver.

Meer informatie (ENG):

DRV8825 specificaties:

  • PWM Microstepping Motor Driver
  • Built-In Microstepping Indexer
  • Five-Bit Winding Current Control Allows
  • Up to 32 Current Levels
  • Low MOSFET On-Resistance
  • 2.5-A Maximum Drive Current at 24 V, 25°C
  • Built-In 3.3-V Reference Output
  • 8.2-V to 45-V Operating Supply Voltage Range
  • Thermally Enhanced Surface Mount Package

Overview
This product is a carrier board or breakout board for TI’s DRV8825 stepper motor driver; we therefore recommend careful reading of the DRV8825 datasheet (1MB pdf) before using this product. This stepper motor driver lets you control onebipolar stepper motor at up to 2.2 A output current per coil (see the Power Dissipation Considerations section below for more information). Here are some of the driver’s key features:

  • Simple step and direction control interface
  • Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
  • Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
  • Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
  • 45 V maximum supply voltage
  • Built-in regulator (no external logic voltage supply needed)
  • Can interface directly with 3.3 V and 5 V systems
  • Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
  • Short-to-ground and shorted-load protection
  • 4-layer, 2 oz copper PCB for improved heat dissipation
  • Exposed solderable ground pad below the driver IC on the bottom of the PCB
  • Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)

This product ships with all surface-mount components—including the DRV8825 driver IC—installed as shown in the product picture.

Some unipolar stepper motors (e.g. those with six or eight leads) can be controlled by this driver as bipolar stepper motors. For more information, please see the frequently asked questions. Unipolar motors with five leads cannot be used with this driver.

Meer informatie @ reprap.org