DFM Engineering, Inc.
1035 Delaware Ave. Unit D
Longmont, CO 80501
Phone: 303-678-8143
Fax: 303-772-9411

Telescope Control System Standard Features

Utilizing an IBM compatible computer with multiple displays and a keyboard, you have continual position display, status reporting, and an easy-to-use, menu-driven, command set.


Commands are divided into four submenus: initialization, movement, rates and miscellaneous.

All commands are available to your external computer, allowing you to create your own custom user interface. Thus, the TCS becomes a peripheral to your computer system, allowing integration with your own observing program.

• Control electronics may be located up to 150 feet from the telescope for remote control from customer-furnished instrument computer

• 28 commands provide complete control of the telescope, dome, etc.

• Built-in library of objects

• Compatible with commercial autoguider systems

• Operates and displays in any epoch

• Hybrid digital/analog servo controllers with zero position error integrator

• 19 in. wide rack-mount houses control system computer and electronics

• Extensive system protection via computer-calculated limits and hard limits


• Hand paddle functions include: guide, set, slew, focus, and dome right-left

• TCS uses a single DC servomotor per axis to simplify mechanical and electronic requirements while enhancing maintainability

• System controls a focus stepper motor with potentiometer as the position sensor. CCT-20 and larger telescopes also have an optical incremental encoder as the position sensors.

• Motor Driver Chassis (MDC) provides power supplies for system, modular components for interface with telescope motors and input signals

• Interface circuit board minimizes discrete wire connections in MDC

• Low electrical draw minimizes uninterruptible power supply requirements

• Mercury limit switch enhances system safety by preventing telescope over-travel

• Shielded cables with proper terminations maximize immunity to electronic noise

• Gold-plated electrical connectors for long-term circuit integrity

• Full wiring schematics provided for maintenance

Telescope Control Systems

CCT-16 Computer Specifications

CCT-20-50 Computer Specifications