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USER MANUAL Chapter 1 Overview • 9
Chapter 1 Overview
Introduction
The DMC-13X8 series motion control cards install directly into the VME bus. This controller series
offers many enhanced features including high-speed communications, non-volatile program memory,
faster encoder speeds, and improved cabling for EMI reduction.
The DMC-13X8 provides two channels for high speed communication. Both controllers use a high
speed main FIFO for sending and receiving commands. Additionally, the DMC-13X8 provides a
secondary polling FIFO for instant access to controller status and parameters. The controller allows
for high-speed servo control up to 12 million encoder counts/sec and step motor control up to 3 million
steps per second. Sample rates as low as 62.5μsec per axis are available.
A 2 meg Flash EEPROM provides non-volatile memory for storing application programs, parameters,
arrays, and firmware. New firmware revisions are easily upgraded in the field without removing the
controller from the VME backplane.
The DMC-13X8 is available with up to four axes on a single VME card. The DMC-1318, 1328, 1338
and 1348 controllers fit on a single 6U format VME card.
Designed to solve complex motion problems, the DMC-13X8 can be used for applications involving
jogging, point-to-point positioning, vector positioning, electronic gearing, multiple move sequences
and contouring. The controller eliminates jerk by programmable acceleration and deceleration with
profile smoothing. For smooth following of complex contours, the DMC-13X8 provides continuous
vector feed of an infinite number of linear and arc segments. The controller also features electronic
gearing with multiple master axes as well as gantry mode operation.
For synchronization with outside events, the DMC-13X8 provides uncommitted I/O, including 8 opto-
isolated digital inputs, 8 digital outputs and 8 analog inputs for interface to joysticks, sensors, and
pressure transducers. The DMC-13X8 controller also comes standard with an additional 64
configurable I/O. Dedicated optoisolated inputs are provided on all DMC-13X8 controllers for
forward and reverse limits, abort, home, and definable input interrupts. The DMC-13X8 is addressed
through the 16 bit short I/O space of your VME system. Vectored hardware interrupts are available to
coordinate events on the controller with the rest of the VME system. Commands can be sent in either
Binary or ASCII.
Overview of Motor Types
The DMC-13X8 can provide the following types of motor control:
1. Standard servo motors with +/- 10 volt command signals
2. Brushless servo motors with sinusoidal commutation
3. Step motors with step and direction signals