Motor Stepper Example

[astanapane]

Hi Henrik,

thanks a lot for the advice.

in order to send for example 200 pulses for one revolution, do i need to give for i = 200 to do the revolution label so many times as the i ?

[HenrikOlsson]

Yes, exactly!
By the way, you seem to have your TRIS settings backwards, a set bit makes the pin an input, a cleared bit makes it an output.

I haven't actually tested the following so please see it as an overall idea and not verified/working code:

DEFINE OSC 4

StepCount VAR WORD   ' Distance to move
Delay VAR WORD          ' Time, in us, between each step-pulse
i VAR WORD                 ' General purpose index/counter variable

But VAR PortB.2
Dir_Pin VAR PortB.4
Step_Pin VAR PortB.5

CW CON 0
CCW CON 1

CMCON = 7
ANSEL = 0
TRISB = %11001111   ' PortB4-5 outputs, rest are inputs.

Main:
  If But = 0 THEN
     StepCount = 200   ' Distance to move motor
     Delay = 2000        ' 2000us between each step
     Dir_Pin = CCW    
     Gosub MoveMotor
  ENDIF
Goto Main

END

MoveMotor:
  For i = 0 to (StepCount - 1)
    Gosub StepIt
    PauseUs Delay
  NEXT
RETURN

StepIt:
    Step_Pin = 1     ' Generate a 10us wide pulse on the step pin.
    PauseUs 10
    Step_Pin = 0
RETURN

/Henrik.

[astanapane]

ops my bad, you are right, TRISB must be otherway round.

1 is inpupt and 0 is output.

Apart from than i will compile the code and try to run it and test it tomorrow.

will keep you updated. Let me print first the jig and fixture models so i can test the steps easier.

thanks a lot.

[astanapane]

today i will try to build the models but will be ready for testing tomorrow. So please give me some time. thanks a lot.

[astanapane]

I have promised you to show you the jig and fixture Mode for the stepper Motor with 1.8* degree and 200 steps per revolution. I have ONLY built 2 parts from the assembly.

For your reference checking the design on the Page 2.

Please find attached pictures. The other 2 parts which is the Base and the columns will be ready tomorrow.

[HenrikOlsson]

Wow! I don't know much about 3d-printing but those pieces looks very profesional, nice work!
What's the end application, is it only for experimenting/learning about step-motors or are these pieces going to be used for some specific application?
Again, nice work indeed!

/Henrik

[astanapane]

hi Henrik,

thanks a lot. the models are from a Fortus 400mc system designed in a 3D CAD.

The specific model is only a jig and fixture part. I designed it for helping me to learn how to move step by step the motor.

But the end application will be based on the following.

a small gear is attached on the small gear and will drive the big gear.