FW-7344

[kkronline]

Hi all,

I am in the position of to prove the functionality of FW-7344 and UMI-7774 hardware. I am novice fellow in motion control. Eventhough, I read manual of motion and 7344. I afraid to do. I just updated my firmware in FW-7344. I connected my umi-7774 with FW-7344.

I am having two sets of hardware. If I want to use with servo motor then what are things I have to do in the wiring part with UMI. What are the I/O s  must be connected to Servo drive. What are the optional ?

Can I do some trapezoidal motion in MAX itself . if possible, kindly give some guidelines and example VI for direct run.

Expecting the reply....

Thanks in advance

Karthik

[Jochen]

Karthik,

please use the motion support portal as a starting point. You will find there everything from installation, configuration up to tuning and additional examples.
If you have any specific questions please post them here.

Best regards,

Jochen Klier
National Instruments Germany

[David S.]

Hi Karthik -

The physical connections made between your UMI-7774 and servo drive will be entirely dependent on which inputs are necessary for the drive to function.  There is no standard for these connections, so each application will differ.  I recommend that you refer to the drive's user manual to see which inputs are required.  Typically--but not always--a servo system will require the following signals on the Control connector of the UMI-7774:

1. Analog Output (output to drive)
2. Enable (output)
3. Fault (input from drive)

In addition, since a servomotor system is necessarily closed-loop, you'll have to connect the encoder or analog feedback signals so the controller can use this input.

The user manual for your UMI-7774 can be found on the following page:
National Instruments Universal Motion Interface (UMI)-7774/7772 User Manual

To perform a move in MAX, you will first need to tune the system's control loop.  This can be a very rigorous and iterative process.  Advice for adjusting the tuning constants on your controller can be found here:
Understanding Servo Tune

Once the system is connected, configured, and tuned, you can perform simple test moves in MAX using the 1-D Interactive interface.  Simply specify the type of command you want to give in the "Operation Mode" control and input your target position or velocity.  You can start a move by clicking the "Start" button and watch its trajectory on the "Misc Plots" tab.  

To perform a move in LabVIEW, you can open one of the example programs that are installed with the NI-Motion API.  To do so, choose "Find Examples" from the "Help" menu.  When the example finder opens, Browse by Task to the "Hardware Input and Output >> Motion Control >> Straight Line Move" folder.  The example One-Axis Move (Accel - Max Velocity - Decel).vi will perform a trapezoidal move.