Hi Ted,
Thanks for using our discussion forums. What you are trying to do is probably something you can accomplish with our hardware and software. What you might try, first of all, is a servo motor board like the PCI-7344. When you install the drivers with this board, there will be a tuning utility automatically installed into the Measurement and Automation Explorer utility. This will allow you to "auto tune" with our built in algorithm or also manually tune the PID parameters.
We also have built in VIs for servo driving as well. If you need to use a custom algorithm, however, other than PID, you may consider looking into our SoftMotion development module for LabVIEW. Let us know a little more about what exactly it is you are trying to do and we should better be able to suit your needs.
Happy Holidays!
Dan Q
Applications Engineer
National Instruments