Of course, the ULN2003 is not a stepper. Could you provide the information on the stepper and define 'not working'. Are the logic levels from the parallel port changing. do you get an error, what?
I need to command a robot 5axes (5motors) with labview. This robot is connected to the pc with a parallel port so can you please help me finding a solution to command 5motors at the same time?
actually I'm not going to command these motors! I'll explain: my program is to control a volume of a bottle : my robot has a sensor in his arm so I will put the filling level and he will take the bottle verify if there is enough water if yes he will continue and fill the glass with the filling water. If the level is achieved he will stop filling and return to his first place. This sensor is conected with a parallel port to the pc. what I have in my blanck vi is basics because i don't know how i can read or write on a parallel port
As Dennis_Knutson said, you'll need to use NI-VISA to communicate over the parallel port. There are several VISA examples available in the example finder.
yep i know that i should use the VISA , but i dont have a parallel visa (like the serial defined on labview) so how can i do to control a parallel port ?
There is no such thing as a parallel VISA like the serial port. You don't need to configure baud rate, etc. You just use a VISA Write with the parallel port (i.e. LPT1) selected as the resource name. For the data, you can set the string control/constant for hex display to send a single byte. You could create an array of U8 and use the Byte Array to String function.
Have you downloaded the example linked in the third post?
It's extremely basic. Put a VISA Write on a block diagram. Create a control for the resource name. Create a control for the string to write. Done. The creation of the controls is a right click option that you should know.
