Pacific Laser Equipment C-400 - Manual (Page 3)

Motor controller 4ch User manual
C-400
November 19, 2002 Release: 1.30 2002 by
Pacific Laser Equipment
PLEquipment, 3941 S. Bristol St. Unit D-122, Santa Ana, CA. 92704,
( 509-355-5155, Fax: 509-355-5155, Email: [email protected]
Page 3 of 21
1. Introduction
1.1. Product description.
The C-400 © is a unique 19inch rack mountable 4ch DC servo motor controller with integrated DC motor
amplifiers on board. It consists of precision amplifiers, power supplies, insulation transformers,
rectifiers, and voltage regulators and TTL logic built around the Mitsubishi M 50734SP processor.
All this is compactly packaged in a 6-part 19 x 3.5 x 10" rack-mount anodized aluminum case.
The DC voltage output can deliver up to +/-12V making the controller compatible with most mechanics
from: Newport, PI, OptoSigma and ThorLabs.
PC control is done via a null modem serial-interface cable that can be purchased as a STANDARD.
On the rear panel the user has access to the AC power plug and the ON / OFF switch.
The fuses are located inside the 19” chassis.
The controller is delivered with this User Manual, power cord and one null-modem serial cable.
This manual is provided as an aid in operating and programming the C-400
©
DC-Motor Controller.
This servo-controller is intended for motion control in research and industrial applications providing in a
single package a complete stand-alone control system for the smaller DC servo motors used in high-
precision positioning systems.
The C-400
©
utilizes quadrature encoder signals for position feedback and depending on the resolution
of the encoder scale, incremental resolutions of 50nm to 0.1
µ
m can be achieved.
The C-400
©
provides servo-control of position, velocity, and acceleration. Although each parameter is
programmable, each is also set to a programmable default value upon power-up.
Using the built-in commands and features, the user will very quickly be able to command the motor to
move to any desired position. During the motion the velocity and acceleration will be controlled in
accordance with the most recent settings of the controller parameters. It is not necessary to set them
up anew for each move. The starter package comes with all connecting cables and software necessary
for immediate operation.
Each axis has provision for two limit switches, in addition to a differential quadrature encoder input with
index capabilities. For highest precision in a homing application, motion is commanded until the
reference switch is encountered, then continues at a slower rate until the encoder index is found. With
this procedure, the home position may be repeated to an accuracy of one encoder count, or the
ultimate accuracy of the system.
All limit and reference switch inputs are sensed through line receivers with 1 volt of hysteresis for noise
rejection. The encoder inputs use differential line receivers with 300 mV of hysteresis. They may be
used with single encoders, as well.
A capture/compare circuit is used to sense any change in the
state of the limit and reference switches. When any one of them changes, a maskable interrupt
is generated. These are several additional sources of interrupt, including excessive error,
encoder error index, and absolute and relative position breakpoints.