Try setting the encoder counts per revolution to an artificially high value (maybe 10x) using the Load Counts per Revolution function just before the Find Home routine. Set your acceleration and velocity values for homing based on this new count value. The higher encoder counts per revolution should fool the card into producing a higher actual final homing velocity. Once you have found the home switch, set all of these values back to the desired values for your program. Please note, you will need to have the counts per revolution set correctly to use the Find Index function.
Regards,
Brent Runnels
Applications Engineer
National Instruments