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Specifications
This appendix lists the hardware and software performance specifications for the National
Instruments PXI/PCI-7330. Hardware specifications are typical at 25 °C, unless otherwise stated.
Stepper Performance
Trajectory update rate range ............................. 62.5 to 500 µs/sample
Maximum update rate............................... 62.5 µs/axis
4-axis update rate...................................... 250 µs total
Multi-axis synchronization ............................... <1 update sample
Double-buffered trajectory parameters
Position range ........................................... ±2
31
steps
Maximum relative move size ................... ±2
31
steps
Velocity range ........................................... 1 to 4,000,000 steps/s
Acceleration/deceleration
1
........................ 244 to 512,000,000 counts/s
2
at a PID update
rate of 250 µs
S-curve time range.................................... 1 to 32,767 samples
Following error range ............................... 0 to 32,767 counts
Gear ratio .................................................. ±32,767:1 to ±1:32,767
Stepper outputs
Maximum pulse rate ................................. 4 MHz (full, half, and microstep)
Minimum pulse width............................... 120 ns at 4 MHz
Step output mode ...................................... Step and direction or CW/CCW
Voltage range ............................................ 0 to 5 V
Output low voltage ........................... <0.6 V at 64 mA sink
Output high voltage .......................... Open collector with built-in 3.3 k
Ω
pull-up to
+5 V
Polarity...................................................... Programmable, active-high or active-low
1
Refer to the
NI-Motion Help
for more information.
