5804 and Stepper Motor help

Ceeter

I have a ucn5804 that I am trying to use with a BS2. I searched google and the forums trying to find some sample code but I can't seem to find any. If someone could point me in the right direction or post some sample code to get me started I would appreciate it. Thanks.


Hardware being used-
29STP5 Unipolar Stepper Motor
UCN5804 Stepper motor driver


Schematic

Clock Loop

The data sheet says this.

The outputs will advance one sequence
position on the high-to-low transition of the STEP
INPUT pulse.

So I would imagine if you did something as simple as

' {$STAMP BS2}
' {$PBASIC 2.5}

step      PIN      5


DO
    HIGH  step
    pause 10
    LOW  step
    pause 1
Loop

This should make the motor turn continually (or jerky). If not, try a different pause time for pause 10. more/less
pulsout might be your next way to go if above didn't work.

After reading your data sheet again... I saw this
Minimum Step Input Pulse Width . . . . . . . . . . . . . . . . . . . . . 3.0 μs

So pulsout would work if set right. But the above code should work also.


If all you are doing with your BS2 is generating a pulse for your stepper motor, then you might want to look into other
ways of generating a pulse, ways that don't take up such a valuable microcontroller.
Like using a 555 timer. However if you plan to controll the stepper motor based on other inputs ( sensors or the like, then the BS2 would be a good thing to use.


P.S. ALWAYS make sure if your circuits are connected with a different power supply than your STAMP, that the GROUNDs of each power supply are wired together.

Post Edited (BPM) : 10/27/2005 11:32:46 AM GMT

Ceeter

Thank you for the help. Using a 555 sounds like a good idea for my application, I'll give that a try.