motor_go( False, # True=Clockwise, False=Counter-Clockwise "Full", # Step type (Full,Half,1/4,1/8,1/16,1/32) 200, # number of steps. LOW) # pull enable to low to enable motor mymotortest. OUT) # set enable pin as output # Actual motor control # GPIO. # Copyright (c) 2021 Maker Portal LLC # Author: Joshua Hrisko # NEMA 17 (17HS4023) Raspberry Pi Tests # - rotating the NEMA 17 to test # - wiring and motor functionality # import RPi.GPIO as GPIO from RpiMotorLib import RpiMotorLib import time # RPi and Motor Pre-allocations #define GPIO pins direction = 22 # Direction (DIR) GPIO Pin step = 23 # Step GPIO Pin EN_pin = 24 # enable pin (LOW to enable) # Declare a instance of class pass GPIO pins numbers and the motor type mymotortest = RpiMotorLib. As stated before, Python and a Raspberry Pi computer will be used as the control components for this project.
Simple characteristics of stepper control are explored: stepper directivity (clockwise and counterclockwise), step incrementing (full step, half step, micro-stepping, etc.), and step delay. The DRV8825 control parameters in the Python stepper library are broken down to educate users on how the varying of each parameter impacts the behavior of the NEMA 17. The wiring and interfacing between the NEMA 17 and Raspberry Pi is given, with an emphasis on the basics of stepper motors. The Raspberry Pi uses Python to control the motor using an open-source motor library.
Robot stepper motor driver#
In this tutorial, the stepper motor is controlled by a DRV8825 driver wired to a Raspberry Pi 4 computer. The NEMA-17HS4023 is introduced here, which is a version of the NEMA 17 that has dimensions 42mm x 42mm x 23mm (Length x Width x Height). The NEMA 17 is a widely used class of stepper motor used in 3D printers, CNC machines, linear actuators, and other precision engineering applications where accuracy and stability are essential.
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