© National Instruments
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Introduction
This chapter includes information about the features of the National Instruments PXI/PCI-7330
controller and information about operating the device.
About the NI 7330 Motion Controller
The NI 7330 motion controller features advanced motion control with easy-to-use software tools
and add-on motion VI libraries for use with LabVIEW.
Features
The NI 7330 motion controller is a stepper motor controller for PXI and PCI. The NI 7330
provides fully programmable motion control for up to four independent or coordinated axes of
motion, with dedicated motion I/O for limit and home switches and additional I/O for
general-purpose functions.
You can use the NI 7330 motion controller for point-to-point and straight-line vector moves for
stepper motor applications. The NI 7330 motion controller adds the ability to perform arbitrary
and complex motion trajectories using stepper motors.
Stepper axes can operate in open or closed-loop mode. In closed-loop mode, stepper axes use
quadrature encoders or analog inputs for position and velocity feedback (closed-loop only), and
provide step/direction or clockwise (CW) /counter-clockwise (CCW) digital command outputs.
All stepper axes support full, half, and microstepping applications.
Hardware
The NI 7330 is a high performance motion controller that uses an advanced dual-processor
architecture including a 32-bit CPU, combined with a digital signal processor (DSP) and custom
field programmable gate arrays (FPGAs). The first-in, first-out (FIFO) bus interface and
powerful function set provide high-speed communications while offloading complex motion
functions from the host PC for optimum command throughput and system performance.
Each axis of the NI 7330 motion controller has motion I/O for end-of-travel limit and home
switch inputs, breakpoint output, trigger input, and encoder feedback. Refer to Appendix A,
, for information about the encoder feedback rates. The NI 7330 motion controller
also has non-dedicated user I/O including 32 bits of digital I/O and four analog inputs for ±10 V
signals, joystick inputs, or monitoring of analog sensors. Additionally, the NI 7330 motion
controller analog inputs can provide feedback for loop closure.
