Tedd OKANO / StepperMotorUni

Unipolar stepper motor operation library

Dependents:   LAB04_Oppgave1 test_stepper Stepper_Motor_Demo StepperMotorUni_Hello ... more

Unipolar stepper motor library

This library generates pulses on 4 digital output pins of the mbed. The pulses are generated by mbed's ticker function.

The mbed pins cannot drive the stepper motor directly. So it requires driver stage for the motor. The circuit may be like following diagram.
The driver stage should be chosen by requirement for the stepper motor.

/media/uploads/okano/unipolar-steppermotor-sample.png

The mbed generates pulses on 4 output pins for external driver stage.
This library can generate 3 types of pulses.

1 phase drive (wave drive) /media/uploads/okano/1phase_drive.gif

2 phase drive /media/uploads/okano/2phase_drive.gif

1-2 phase (half step) drive /media/uploads/okano/halfstep_drive.gif

Components pages

Components pages are available for bipolar and unipolar motor libraries

A bipolar stepper motor driving pulse generator

A unipolar stepper motor driving pulse generator

Files at this revision

API Documentation at this revision

Revision 6:007d0570ba4f, committed 2017-09-13

Comitter:
okano
Date:
Wed Sep 13 03:55:30 2017 +0000
Parent:
5:93f9ce526f38
Child:
7:7e6fb609780a
Commit message:
fix for keeping stop position

Changed in this revision

StepperMotorUni.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/StepperMotorUni.cpp	Mon Apr 27 01:16:51 2015 +0000
+++ b/StepperMotorUni.cpp	Wed Sep 13 03:55:30 2017 +0000
@@ -288,7 +288,9 @@
     distance    = (distance < 0)? -distance : distance;
 
     if ( !distance ) {
-        motor_out   = power_ctrl ? 0 : 1;
+        if ( power_ctrl )
+            motor_out   = 0;
+            
         moved_steps = 0;
         return;
     }