Chapter 3
Hardware Overview
©
National Instruments Corporation
3-5
A flash memory download utility is included with the NI-Motion software
that ships with the controller.
Axes and Motion Resources
The PCI-7390 controller can control up to four axes of motion. The axes
can be completely independent, simultaneously coordinated, or mapped
in multidimensional groups called coordinate spaces. You also can
simultaneously start coordinate spaces for multi-vector space coordinated
motion control.
Axes
At a minimum, an axis consists of a trajectory generator, a stepper control
block, and a stepper pulse generator output. Closed-loop stepper axes
require a feedback resource, while open-loop stepper axes do not.
Figure 3-3 shows this axis configuration.
With the PCI-7390 controller, you can map one feedback resource and
one or two output resources to the axis.
Figure 3-3.
Stepper Axis Resources
The PCI-7390 supports axes with secondary output resources. Defining
two output resources is useful when controlling axes with multiple motors.
Note
Refer to the
NI-Motion User Manual
for more information about configuring axes.
01011010
010010110
Stepper
Control
Loop
Trajectory
Generator
32-Bit
Encoder
Interface
øA
Index
Optional
Stepper
Pulse
Generator
