wiring a usb 6009 for stepper motor

[Thordon]

I am trying to use a USB 6009 to send signals to my stepper motor controller (Velmex NF 90, yes old i know).  I can manually control my motor using the device and interface tap in measurement and automation (M&A) but I am working on writing a labview code to control the motor.  There are three wires I need to connect to the stepper motor controller, send data, receive data and ground.  

I have been trying to create a task with M&A to send a signal of letters and numbers to the motor controller but I don't have much background or knowledge.  

Any and all help would be greatly appreciated.  Thanks

[Esteban_B]

Hi Thordon,

The Velmex NF 90 that you mention uses RS 232 protocol, and the USB 6009 is not a serial device, It has DIO, but these are not exactly a serial port and to be able to use those as serial you will need to program basically all the protocol to send the pulse train that each command will represent, and also to receive back the commands that the device will probably reply.

I would recommend you to use a USB-Serial cable and use NI-VISA to send and receive the commands instead of the USB 6009.

Regards,

[Thordon]

thanks for your reply.  Sounds like the programming needed is above my level.  I was hoping to be able to test the motor controller with my labtop while gaining some knowledge of the 6009 but it doesn't look like that is possible (unless I buy an adaptor).  

[Dennis_Knutson]

Doing serial commands is easier, in my opinion, than DAQ programming but that is your decision. An adapter is a fraction of the cost of the 6008.