ASTRO-PHYSICS 400 Manuale - Pagina 7
Sfoglia online o scarica il pdf Manuale per Telescope ASTRO-PHYSICS 400. ASTRO-PHYSICS 400 8. German equatorial mount with dual axis quartz drive (silver-dome knobs)
Stampa la paginaOPERATION OF THE CONTROLLER
The push button controller contains all the circuitry for driving the two motors.
The controller will be operational when attached to both the motors of the mount
and a power source. There is no on-off switch. The following diagram
illustrates the controller and cables.
A very accurate quartz clock specifically calibrated for the drive gear is an
integral part of the controller. The calibration is made to the King sidereal rate,
which compensates for atmospheric refraction over a large part of the sky. With
this tracking rate, it is easier to maintain critical guiding at high power. For the
most sophisticated tracking of celestial objects, the controller has a built-in
provision for attaching a ST-4 or ST-6 CCD imaging camera/autoguider. Using
the autoguider function, it is possible to take long exposure astrophotos totally
unattended. You can walk away from the setup to enjoy other observing
activities while your astrograph is in operation.
CABLES: Place the DC power cord into the phono plug outlet of the R.A. motor
box. Plug the short length of the "Y" cable into the R.A. motor box and
the long length into the Dec. motor box. Complete the cable assembly
by joining the control box cable to the "Y" cable. The control box and
motors are designed to work at 12 volts DC. Suggested power sources
include: portable rechargeable battery pack, auto battery, or power
converter for 110 volts.
DRIVE ROTATION: If you are operating the 400 mount north of the equator, the
HEMISPHERE switch must be set to "N". If south of the equator set the
switch to "S".
PUSH BUTTONS: The four red buttons are arranged so that the left and right
buttons control the movement in right ascension, and the top and
bottom buttons control the declination. This is the normal orientation of
objects in the eyepiece field. If the star moves down when you push the
"N" button, move the DEC REVERSE switch into the opposite position.
Pushing the right hand button "E" should cause the star to move to the
right. If it moves to the left, move the RA REVERSE switch to the other
position. When properly set up, the controller buttons will cause the
object to move according to your orientation at the eyepiece.
MODE SWITCH: There are three guiding modes (rates): a 2X guiding rate and a
8x and 16x slew rate. The slew rates are for positioning objects in the
field, the guide rate is for fine guiding at high powers during
astrophotography. Move the switch to select the mode that you prefer.
SELECT BUTTON: The control box has three drive rates to choose from: SID
(sidereal), SOL (solar), and LUN (lunar). Select the position appropriate
for the object under observation.
King Sidereal: Tracking rate for observing planets, stars, galaxies and
Solar:
Lunar:
LED KNOB: There is an LED output available on the 400 Dec. axis motor housing as shown in diagram above. You may
insert your LED reticle to this plug. Brightness can then be controlled using the MIN to MAX (minimum to
maximum) setting of the LED knob.
AUTOGUIDER CONNECTION: If you own a Santa Barbara Instrument Group (SBIG) ST-4 or ST-6 Star Tracker/Imaging
system, connect it to the controller via this 9 PIN connector. Call Astro-Physics to purchase a separate cable
for this connection. The cable that we offer will allow your mount and ST-4 (ST-6) to operate from the same
power source, if you choose.
other distant objects.
Tracking rate for observing the sun.
Tracking rate for observing the moon