|Telescope Control Cabinet
its main panel
and its real heart
| The Telescope Control Cabinet main power switch
is at the left hand side of the cabinet.
The cabinet front panel allows to control manually
The red LEDs in a column indicate error conditons. If one of these errors occurs telescope motion stops immediately.
||The handset differs from the classical telescope
handset in that it is an independant device in the Telescope Control Network.
It communicates not only with the control PC but also with any other micro
controller module (e.g. to move the dome). It does have a display, cursor
and a set of function buttons. The display is fed by the PC (with position
information). The function buttons are for dome control etc.. For a detailed
description see below.
||The joybox is used by the observer only in case
the control program fails, e.g. to move the telescope to encoder reference
positions. The cursor buttons of the joybox move the telescope in hour angle
and declination. The box is directly connected to the Lenze motor control
unit. To get it activatetd the mode switches at the Lenze motor control board
have to be set to "Hand" (i.e. manual).
|Flat-filed lamp power supply
||When pressed telescope motions will be stopped
immediately . The red button has to be pulled back to be deactivated.
window at the Linux workstation "becker".
||The telescope control program HOLICS (running on
the dedicated telescope control PC in the HOLICS room) is started with the
HOLICS icon and runs in a terminal window. The user interface is still
text based. All operations are initiated by pressing a key which is interpreted
as a function key.
|Weather PC (under construction)
||This PC is connected to the weather monitoring station
and the rain sensor at the distant edge of the laboratory building.
|Rain buzzer and flash light (under
||This is triggered by the rain sensor. In case of
rain also the dome slit shall close automatically. The decision when to reopen
after rainfall has stoped is up to the observer.
PC (HOLICS PC)
||Linux PC running the main telescope control program.
The program is usually started from the "becker" PC in the observers room
and runs there in a terminal window. It can also be started and run from
here. (login as usual "ccd/dig_lab" and hit the HOLICS icon).
A second PC exists as backup system.
|"Lenze" telescope motor control
||Each of the two telescope drive motors has
its own control unit: Ha - left, Dec - right.
(uninterruptible power supply)
||This UPS supports only the telescope control PC.
The main purpose is to prevent loss of telescope status and position
information during power failure (ca. 30min max.). Usually the observers isn't
concerned with this device. Here it is shown for completeness.
|Telescope focus control unit (under
||This has a reset button that has to be pressed
by the observer when a telescope focus reset becomes necessary (e.g.. in
case the focus position encoder - the famous SONY - fails).
||When pressed telescope motions will be stopped immediately. The red button has to be pulled back to be deactivated.|