Getting my stepper motor to work

[Wes Uk]

Hi, I'm still having problems getting the stepper motor to respond to my labview commands.

I have looked at loads of webpages, example code and other forum threads and tried a few fixes

Portmon gave me the following information for the stepper...

Baud rate 9600,

8 data bits,

no parity,

1 stop bit,

no flow control.

I have inputted this info into the code 'zero stepper.vi' (attached)

The movement strings which the stepper responds to are

'MR' for move relative and then a value of steps

for instance MR 1232543545

I have inputted this value into the 'string to write' box and nothing happens when I run the VI

Are there any other syntax's etc... which I need to include in the 'string to write box'? or is my stepper just not responding?

When I debug the VI it runs through no problems

The Stepper motor manufactures have been pretty un helpful, and have never heard of a program called LabView !

Any tips would be greatly appreciated

Cheers Wes

[johnsold]

Wes,

Does the stepper motor controller require a carraige return or line feed at the end of each command? Many devices do. If so you will need to send that. Even if you do not have the command syntax for the controller, it is easy to try the common termination characters. Set the "string to write" to '\' codes display and you will be able to see and send non-printing characters.

Lynn

[Wes Uk]

Hi Lynn, The documentation I have doesn't say that a carriage return or line feed is needed.

I set the string to write properties to backslash and had no joy either

I have tried using '/r' which other people have used with their stepper motors and this does nothing either

Are there any other possibilities which I could research?

Regards Wes

[daijoubu]

Does your stepper motor work if you enter the command through Hyperterminal?

I've modified your vi to append a carriage return to the command you send to the motor.  You can replace the carriage return with a linefeed if that's what you need.

[Wes Uk]

Mate your a legend

Cheers Wes