~: Stepper motor controller with VC++ :~

Abstract:-  This is second window based application built on the platform of VC++.  This project tells you how stepper motor can be driven/controlled. With the help of VC++ computer will control all the actions of bipolar stepper motor like varying speed (RPM), varying number of rotations, changing directions etc. 2-degree of motion control is provided means continuous rotations and step rotations. Let us see some of the features of this application

Totally windows based application so very powerful GUI. More user friendly program

  Uptill now we haven't done any coding but now the coding part will start. You have to attach a function with each button. For this open class wizard from view menu. Follow the steps

1. Select the button ID like "IDC_CLK" or any other and click on BN_CLICKED event

2. Then press add function button. A message box will appear with name of function. leave it as it is and click OK. You will be diverted in source code to  this edit function.

3. Right now don't edit but follow the same procedure and attach function to each button.

4. Now you have to attach a variable to both static text. For this again open class wizard and select member variable tag.

5. You will find all the IDC will appear in dialog box. Select IDC of static text ' IDC_RPM '.

6. Now click add member variable button. Second dialog box will appear. Give the name of variable as "m_rpm". In a category choose value and in type choose CString click ok.

7. do same procedure to attach variable to another static text named m_rot

8. Finely open DCMCDlg.cpp file and move to the top of file. Define some variables as given below

           int s;
       float d,s1,n,r;

click here to view how to write code for all above functions

Refer the table given below to know the application of each function in program

Now to rotate the motor continuously at constant speed (60 RPM) we have to add one more function and its name is OnMouseMove.

To attach this function follow the steps given below

1. Open classview wizard

2. Select 'CStepDlg' in Object ID (the name is in my software may be differ in every case)

3. Scroll down the message box and select WM_OnMouseMove event.

4. Now click on button add function and you will see new member function ON_WM_MOUSEMOVE is created.

5. click the button edit code. Now edit the code as given below.

void CStepDlg::OnMouseMove(UINT nFlags, CPoint point)
    {
    // TODO: Add your message handler code here and/or call default

        if((nFlags & MK_LBUTTON) == MK_LBUTTON)
            {
                _outp(0x0378,0xCC);
                Sleep(50);
                _outp(0x0378,0xC3);
                Sleep(50);
                _outp(0x0378,0x33);
                Sleep(50);
                _outp(0x0378,0x3C);
                Sleep(50);
            }
        else if((nFlags & MK_RBUTTON) == MK_RBUTTON)
            {
                _outp(0x0378,0xCC);
                Sleep(50);
                _outp(0x0378,0x3C);
                Sleep(50);
                _outp(0x0378,0x33);
                Sleep(50);
                _outp(0x0378,0xC3);
                Sleep(50);
            }
CDialog::OnMouseMove(nFlags, point);
}

After attaching this function wherever (on program screen) you press left mouse button and scroll (move) the the mouse by holding it down motor will rotate in clockwise direction. Moving the mouse by holding down right mouse button will rotate the motor in anticlockwise direction. Stop moving mouse will stop the motor.

After finishing all these build and run the application. See the working of all the buttons. Prepare hardware circuit as shown in article. Connect it with LPT port of computer. Switch on  the power supply. Now click forward or reverse button and see whether motor is running or not.