Diffraction Limited MD1 Benutzerhandbuch
1
Introduction
The MaxDome controller system provides complete automated control of a
telescope dome and associated shutter. For lower-cost installations, rotation-only
operation is also supported.
The MaxDome controller system is available in two configurations: rotation only,
and rotation plus shutter control.
telescope dome and associated shutter. For lower-cost installations, rotation-only
operation is also supported.
The MaxDome controller system is available in two configurations: rotation only,
and rotation plus shutter control.
Rotation
The Controller Card connects directly to a Windows-based Personal Computer
via an RS-232 link. The MaxDome driver in the computer handles all
communications to the controller board.
The controller card directly controls a motor driver board, which turns on the
motor in either the forward or backwards direction.
The Motor Sensor counts rotations of the motor shaft; this is used to detect when
the dome has rotated to the correct position. One side of the shaft is colored
black, the other is reflective metal. The sensor is optical, and is able to count
twice per rotation. This is sufficient to position the dome very accurately.
In order to set the dome to a specific azimuth, a home sensor must be installed.
The home sensor is a simple magnetic switch similar to those used in home
burglar alarms. Whenever the home position sensor is detected, the dome
position is reset to the user-supplied azimuth value.
via an RS-232 link. The MaxDome driver in the computer handles all
communications to the controller board.
The controller card directly controls a motor driver board, which turns on the
motor in either the forward or backwards direction.
The Motor Sensor counts rotations of the motor shaft; this is used to detect when
the dome has rotated to the correct position. One side of the shaft is colored
black, the other is reflective metal. The sensor is optical, and is able to count
twice per rotation. This is sufficient to position the dome very accurately.
In order to set the dome to a specific azimuth, a home sensor must be installed.
The home sensor is a simple magnetic switch similar to those used in home
burglar alarms. Whenever the home position sensor is detected, the dome
position is reset to the user-supplied azimuth value.
Shutter
A second Controller Card is installed on the dome itself for controlling the shutter
motors. Sirius domes have an upper and lower shutter, and therefore two motors.
The motors are sequenced one after the other, to ensure that the shutters do not
motors. Sirius domes have an upper and lower shutter, and therefore two motors.
The motors are sequenced one after the other, to ensure that the shutters do not