ADLINK PCI-8164 - Manual (Page 13)

Introduction 1
1 Introduction
The PCI-/MPC-/PXI-8164 is an advanced 4-axis motion controller
card that generates high frequency pulses (6.55 MHz) to drive
stepper or servomotors, and provides a 2-axis circular interpola-
tion, 4-axis linear interpolation, or continuous interpolation for con-
tinual velocity. The PCI-/MPC-/PXI-8164 also changes position
and/or speed on the fly with a single axis operation.
Multiple PCI-/MPC-/PXI-8164 cards may be installed in one sys-
tem. Incremental encoder interface on all four axes provide the
ability to correct positioning errors generated by inaccurate
mechanical transmissions. With the aid of an onboard FIFO, the
PCI-/MPC-/PXI-8164 also performs precise and extremely fast
position comparison and trigger functions without compromising
CPU resources. In addition, a mechanical sensor interface, a
servo motor interface, and general-purposed I/O signals are pro-
vided for easy system integration.
The following figures show the functional block diagrams of the
8164 card in PCI, MPC, and PXI interfaces. The PCI-/MPC-/PXI-
8164 uses one ASIC (PCL6045) to perform all 4 axes motion con-
trols. The motion control functions include linear and S-curve
acceleration/deceleration, circular interpolation between two axes,
linear interpolation between 2-4 axes, continuous motion position-
ing, and more than 13 home return modes. All these functions and
complex computations are performed internally by the ASIC, thus
minimizing CPU usage and eliminating real-time issues.