The PC GadgetMaster II Stepper Motor Control Developed by Frank Shapleigh Edited by Jim Tuff.

The PC GadgetMaster IIStepper Motor Control

Developed by Frank ShapleighEdited by Jim Tuff

Simple Variable“Contains” numbers, characters or strings of characters.

Contents of a variable change each time an assignment is made.

Eg.

X = 1

X = 2

X = 3

X = 4

X4

Stepper Control Variables Explained

Array Variable

Array “Elements” can also store numbers, characters or strings of characters.

Elements and their contents are referenced by an “index”.

Eg.

A(1) = 128

A(2) = 64

A(3) = 32

A(4) = 16

One Dimensional array

A( )

Stepper Control Array Variables Explained

1 128

2 64

3 32

4 16

Example:Private Sub Command1_Click()

A(1) = 128

A(2) = 64

A(3) = 32

A(4) = 16

S = 1

Text1 = A(S)

End Sub

Stepper Control Array Variables / Digital Output

Text1 Displays the value of A(1)

S = (1) = 128

Digital Output 1 (128) is 12 volts

Example:Private Sub Command1_Click()

A(1) = 128

A(2) = 64

A(3) = 32

A(4) = 16

S = 3

Text1 = A(S)

End Sub

Stepper Control Array Variables / Digital Output

Text1 Displays the value of A(3)

S = (3) = 32

Digital Output 3 (32) is 12 volts

Stepper Motor ControlClockwise Motion

Stepper Code:Private Sub Command1_Click()

If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

Stepper Control

Clockwise Motion 00 1 2 3 4The Stepper Control Cycle begins with the Array Variable value of ‘S=0’

S = 0 + 1 = 1

A(S) = A(1) = 128

12 volts is sent to Digital Output 1


If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

Stepper Control

Clockwise Motion 0 1 1 2 3 4The Stepper Control Cycle now has an Array Variable value of ‘S=1’

S = 1 + 1 = 2

A(S) = A(2) = 64



If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

Stepper Control

Clockwise Motion 0 1 22 3 4The Stepper Control Cycle now has an Array Variable value of ‘S=2’

S = 2 + 1 = 3

A(S) = A(3) = 32



If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

Stepper Control


S = 3 + 1 = 4

A(S) = A(4) = 16



If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

Stepper Control


S is not less than 4!!

S = 1

A(S) = A(1) = 128

12 volts is sent to Digital Output 1 (cycle repeats)

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S < 4 Then

S = S + 1

Else

S = 1

End If

Out 888, A(S)

End Sub

5

4

3

2

1

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

12 volts

5

4

3

2

1


Forward

End Sub


If S < 4 Then ‘S is 0

S = S + 1

Else

S = 1 ‘S is 1

End If

Out 888, A(S) ‘A(1) is 128

End Sub



((CWCW))

5

4

3

2

1

12 volts


Forward

End Sub



S = S + 1 ‘S is 2

Else

S = 1

End If

Out 888, A(S) ‘A(2) is 64

End Sub



((CWCW))

5

4

3

2

1

12 volts


Forward

End Sub



S = S + 1 ‘S is 3

Else

S = 1

End If

Out 888, A(S) ‘A(3) is 32

End Sub



((CWCW))

12 volts

5

4

3

2

1


Forward

End Sub



S = S + 1 ‘S is 4

Else

S = 1

End If

Out 888, A(S) ‘A(4) is 16

End Sub



((CWCW))

5

4

3

2

1 12 volts


Forward

End Sub



S = S + 1

Else

S = 1 ‘S is 1

End If

Out 888, A(S) ‘A(1) is 128

End Sub



((CWCW))

Stepper Motor ControlCounter Clockwise Motion


If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

Stepper Control Counter-Clockwise Motion 0 1 2 3 44

The Stepper Control Cycle begins with the Array Variable value of ‘S=0’

S is not greater than 1!!

S = 4

A(S) = A(4) = 16



If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

Stepper Control Counter-Clockwise Motion 0 1 2 3 3 4

The Stepper Control Cycle now has an Array Variable value of ‘S=4’

S = 4 – 1 = 3

A(S) = A(3) = 32



If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub



S = 3 – 1 = 2

A(S) = A(2) = 64



If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub



S = 2 – 1 = 1

A(S) = A(1) = 128



If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub



S is not greater than 1!!

S = 4

A(S) = A(4) = 16

12 volts is sent to Digital Output 4 (cycle repeats)


Forward

End Sub


If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

5

4

3

2

1


Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

12 volts

5

4

3

2

1


Forward

End Sub


If S > 1 ‘S is 0

S = S - 1

Else

S = 4 ‘S is 4

End If

Out 888, A(S) ‘A(4) is 16

End Sub




5

4

3

2

1

12 volts


Forward

End Sub


If S > 1 Then ‘S is 4

S = S - 1 ‘S is 3

Else

S = 4

End If

Out 888, A(S) ‘A(3) is 32

End Sub




5

4

3

2

1

12 volts


Forward

End Sub



S = S - 1 ‘S is 2

Else

S = 4

End If

Out 888, A(S) ‘A(2) is 64

End Sub




12 volts

5

4

3

2

1


Forward

End Sub



S = S - 1 ‘S is 1

Else

S = 4

End If

Out 888, A(S) ‘A(1) is 128

End Sub




12 volts

5

4

3

2

1


Forward

End Sub


If S > 1 ‘S is 1

S = S - 1

Else

S = 4 ‘S is 4

End If

Out 888, A(S) ‘A(4) is 16

End Sub




The PC GadgetMaster IIStepper Motor Control

END

The PC GadgetMaster II Stepper Motor Control Developed by Frank Shapleigh Edited by Jim Tuff.

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