Hi,National Instruments does provide add-on motion control tool kits for Labview. The detailed information can be found at:
http://sine.ni.com/apps/we/nioc.vp?lang=US&pc=mn&cid=1397
You can also choose to use the National Instruments Motion Controllers.
I also found previous discussions on the developer zone which are very helpful:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=5065000000080000001D2C0000&ECategory=Motion
If you use some third party motion controller, make sure they have drivers for LabVIEW and the version is correct.
If there is further question, just reply to this post and I will be notified.
XD Gao
Application Engineer
National Instruments