Difference between revisions of "Lesson 38--Microduino Stepping Motor Drive"

Objective

This tutorial will show you how to control the stepping motor by Microduino-Stepper module, and welding the step motor control board.

Equipment

• Microduino-Core
• Microduino-USBTTL
• Microduino-Stepper
• Other equipments:
  • USB cable
  • Pegboard
  • Studs, screws
• Welding tools：
  • Electric iron
  • Solder
  • Wire
  • Forceps

Stepper motor

• Connection method for the stepping motor：

Connect the stepper motor to Microduino-Stepper 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-Stepper uses 1/16 stepping mode by default).

• Angle calculation：

Stepper motor parameters：1.8deg/step, 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

Debugging

• 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

Programming

• Used library：【AccelStepper librarygithub下载 】
• Download 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 stepping motor successfully by Microduino-Stepper module.

Video

http://v.youku.com/v_show/id_XNjg5MTcwOTA0.html