property motor1: DCMotor :py:class: controls for motor 1. The overall PCA9685 PWM frequency in Hertz. I've also seen around that other operations occurring on the Pi may be causing clock stretching, but I don't know what those operations could be since this is the only thing we're running.ĭo we need to change drivers, or even switch from Raspberry Pi to an Arduino or something? Let me know if any additional information is needed. steppersmicrosteps Number of microsteps per step for stepper motors.Default is 16. Dependencies This driver depends on: Adafruit CircuitPython Bus Device Register PCA9685 Motor Please ensure all dependencies are available on the CircuitPython filesystem. standard DC motor with H -bridge driver or a stepper motor where: MotorNum is a value used. Introduction CircuitPython helper library for the DC & Stepper Motor FeatherWing, Shield and Pi Hat kits.

What is causing this discrepancy? We believe the problem may be with the I2C bus communication between the Pi and the HAT, as this can be measured within the program even when the power source is disconnected from the motors, and changing the baudrate to 400000 (from 100000) improves the accuracy slightly. L298N Driver Module for Arduino - Fritzing WebMosfet IRFZ44N. However, when we test the rpm both manually with a timer and within the program itself using time.time() before and after the call to move the motor, the measured RPM is consistently much lower than what we are aiming for. All of them still make the Nema stepper motor very hot. I was originally using a 12v 6a power supply but quickly switched to a 12v 2a and then a 12v 1a. Now the big problem is trying to power it without it overheating. Description My ultimate goal with this program is to have a Flask web app be projected, someone connects to it, and they can control stepper motors with it using the Adafruit Stepper Motor HAT. The motors have a step angle of 1.8 degrees, so 200 steps per revolution.Ī teammate and I have written a python program using the Adafruit_MotorHAT library in which the speed in RPM is set using tSpeed(60) (for example). 1 I have an adafruit motor shield and attached the Nema 17 stepmotor.

I'm trying to drive some stepper motors using a Raspberry Pi 3 B V1.2 and an Adafruit Stepper Motor HAT v0.1 and am having trouble setting them to the speed I want.

Adafruit stepper motor fritz