DC Motor Controller for Complex Positioning Task
A few months after its introduction, the C-844 DC Motor Controller has already found many user for standard and OM applications. Concept
C-844 is a flexible, multi purpose, rack mount positioning and motion controller for DC servo motors and can be

Fig. 1, C-844 DC Motor Controller with M-500 Translation Stae XY-Combination and M-038 Rotary Stage


DC Motor Controller for Complex Positioning Task
Real Time Operating System

C-844 is based on multi-processor architecture including a fast DSP motion control chip set providing trajectory generation and closed loop digital servo control based on position information supplied by incremental encoders. A host processor features real time communication and high level command handling with advanced func- tions such as stackable macro commands (up to 16 macros, up to 100 commands per macro, non volatile storage). For communication, both RS- 232 and IEEE488 interfaces are integrated.

Integrated Power Amplifiers

Integrated, low noise, 15 Watt linear power amplifiers allow operation of all PI micropositoning systems without

 additional external amplifiers, reducing costs and simplifying the set-up. In addition to the analog motor output, PWM (Puls Width Modulation) output signals can be activated by software to drive micropositioners such as the M-5000 Family of Translation Stages.

SCPI Programming Language

The command language complies with the SCPI (Standard Commands for Programmable Instruments) standard which is a user friendly tree-structured language reflecting the device function- ality. The C-844 is prepared for future firmware updates via the RS- 232 interface.
A variety of software tools such as LabViews drivers, libraries in C, PASCAL and BASIC and an Windows™ operating program for instant, easy operation are supplied with the system (see "Software for C-844").
used for complex positioning tasks in research and industry.
C-844 offers 100+ commands for setting and reading servo parameters, acceleration, velocity, etc. on the fly, and advanced features such as S-curve profile generation, electronic gearing, velocity contouring, real time origin position capture and fast 32 bit PID - V-ff servo control.

Features:
 Simultaneous Control of 4
 DC Servo Motors
 Fast 32 bit Digital PID V-ff
 Servo Loop
 Integrated Linear Power
 Amplifiers (12 bit) and
 PWM Outputs
 Trapezoidal-Curve,
 S-Curve& Velocity
 Contouring
 LabView™ Drivers,
 Libraries for C, PASCAL etc.
 IEEE-488.2 and RS-232
 Interfaces
 SCPI Command Language
 Non Volatile Macro
 Command Storage
 16 I/O Lines for Flexible
 Automation
 4 Analog Input Lines (10 bit)
 12 TTL Inputs for Limit &
 Origin Switches
 Electronic Gearing
 Programmable Torque Limit
 Analog Velocity Monitor,
 10 bit