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

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 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

12 volts is sent to Digital Output 2

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 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

12 volts is sent to Digital Output 3

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 0 1 2 33 4The Stepper Control Cycle now has an Array Variable value of ‘S=3’

S = 3 + 1 = 4

A(S) = A(4) = 16

12 volts is sent to Digital Output 4

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 0 1 2 3 44The Stepper Control Cycle now has an Array Variable value of ‘S=4’

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

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

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

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

5

4

3

2

1

12 volts

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S < 4 Then ‘S is 1

S = S + 1 ‘S is 2

Else

S = 1

End If

Out 888, A(S) ‘A(2) is 64

End Sub

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

5

4

3

2

1

12 volts

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S < 4 Then ‘S is 2

S = S + 1 ‘S is 3

Else

S = 1

End If

Out 888, A(S) ‘A(3) is 32

End Sub

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

12 volts

5

4

3

2

1

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S < 4 Then ‘S is 3

S = S + 1 ‘S is 4

Else

S = 1

End If

Out 888, A(S) ‘A(4) is 16

End Sub

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

5

4

3

2

1 12 volts

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S < 4 Then ‘S is 4

S = S + 1

Else

S = 1 ‘S is 1

End If

Out 888, A(S) ‘A(1) is 128

End Sub

PC GadgetMaster II Stepper Control

Clockwise Clockwise Motion Demo Motion Demo

((CWCW))

Stepper Motor ControlCounter Clockwise Motion

Stepper Code:Private Sub Command1_Click()

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

12 volts is sent to Digital Output 4

Stepper Code:Private Sub Command1_Click()

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

12 volts is sent to Digital Output 3

Stepper Code:Private Sub Command1_Click()

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 22 3 4

The Stepper Control Cycle now has an Array Variable value of ‘S=3’

S = 3 – 1 = 2

A(S) = A(2) = 64

12 volts is sent to Digital Output 2

Stepper Code:Private Sub Command1_Click()

If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

Stepper Control Counter-Clockwise Motion 0 11 2 3 4

The Stepper Control Cycle now has an Array Variable value of ‘S=2’

S = 2 – 1 = 1

A(S) = A(1) = 128

12 volts is sent to Digital Output 1

Stepper Code:Private Sub Command1_Click()

If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

Stepper Control Counter-Clockwise Motion 00 1 2 3 4

The Stepper Control Cycle now has an Array Variable value of ‘S=1’

S is not greater than 1!!

S = 4

A(S) = A(4) = 16

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

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S > 1 Then

S = S - 1

Else

S = 4

End If

Out 888, A(S)

End Sub

5

4

3

2

1

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

12 volts

5

4

3

2

1

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

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

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

5

4

3

2

1

12 volts

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

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

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

5

4

3

2

1

12 volts

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S > 1 Then ‘S is 3

S = S - 1 ‘S is 2

Else

S = 4

End If

Out 888, A(S) ‘A(2) is 64

End Sub

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

12 volts

5

4

3

2

1

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

If S > 1 Then ‘S is 2

S = S - 1 ‘S is 1

Else

S = 4

End If

Out 888, A(S) ‘A(1) is 128

End Sub

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

12 volts

5

4

3

2

1

Private Sub Command1_Click()

Forward

End Sub

Public Sub Forward()

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

PC GadgetMaster II Stepper Control

Counter Counter Clockwise Clockwise

Motion Demo Motion Demo ((CCWCCW))

The PC GadgetMaster IIStepper Motor Control

END