Lesson 38--Microduino Stepper Motor Drive

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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：File: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