Simple automated testing sequence

[ryouden]

I have been a LabView user for some years now and I've got on reasonably well with it. I am now suffering from brain fade as I'm looking to implement a very simple VI to run an automated test.

I have a motor driving a shaft with an encoder to give me position feedback. I want to cycle the motion of the shaft depending upon the position of the encoder. My basic routine would be:

Run motor to end of shaft and stop when encoder output is a certain voltage. Run the motor to the other end of the shaft and stop when the encoder output is a certain value. It sounds very basic but I can't for the life of me work out how to get it running!

Any advice would be greatly received...

[GerdW · Accepted solution]

Hi ryouden,

as you want to cycle your motor you should start to implement a simple state machine: init, homing, move to end, move to start…

[ryouden]

Thanks GerdW,

I found an online tutorial and it worked out great.

Richard.

[ryouden]

GerdW,

One more question for you, how can I count the number of times I execute a certain task in teh state machine? I have implemented a number of Case Structures and I'd like to know how often it is executed?

Thanks,

Richard

[User002]

Hello ryouden,

you can increment a counter within the appropriate state and store its' value in a shift register.

Kind regards