Lesson 38--Microduino Stepper Motor Drive

Language	English

Objective This lesson will show you how to control the stepper motor by Microduino A4982 module, and welding the step motor control board. Equipment Microduino-Core Microduino-FT232R Microduino-A4982 Other equipments: USB cable Pegboard Studs, screws Welding tools： Electric iron Solder Wire Forceps Stepper motor Connection method for stepper motor： Connect the stepper motor to Microduino A4982 module: Four wire two phase stepper motor has two sets of coil A and B, each group coil's resistance is very small, only a few ohm. A and B group is absolutely insulation and disconnected. Measured with a multimeter, connected is a set; After measured group A and B, connect one group coil to OUT1A and OUT1B, the other group coil connects to OUT2A and OUT2B; By changing the MS1 & MS2 to change the stepping mode (Microduino A4982 default uses 1/16 step mode). Angle calculation： Stepper motor parameters：1.8deg/slep, that is stepper motor moves one step turned every 1.8°. Step number=360/1.8*16=3200 step Multiplied by 16 because Microduino A4982 default use 1/16 step mode. Schematic Debug Step 1：Crop the pegboard as specified size； Step 2：Determine the Microduino's base position, then welding the circuit according to the schematics: 洞洞板焊法 正面 反面 Set up circuit ok Program Used library：【AccelStepper librarygithub下载 】 Downlaod test program：文件:Program Test A4982.zip Compile it and select the correct board type to download. Test Connect power (6-25V), the motor won't move in initial state; Press the button, the stepper motor will rotate as setted pace, and LED indicator lights, reverse rotation after a few laps, the cycle repeated; Press the button again, close the drive, LED indicator turn off. Result We can control the four wire two phase stepper motor successfully by Microduino A4982 module. Video http://v.youku.com/v_show/id_XNjg5MTcwOTA0.html