Celestron 94155 Gebrauchsanweisung - Seite 4

Blättern Sie online oder laden Sie pdf Gebrauchsanweisung für Zubehör Celestron 94155 herunter. Celestron 94155 7 Seiten. Focus motor for sct & edgehd

Seite drucken

FOCUS MOTOR FOR SCT & EDGEHD INSTRUCTION MANUAL

CALIBRATING THE FOCUS MOTOR

Before using it for the first time, we recommend

calibrating the focus motor to indicate where the

inward and outward limits of mechanical focuser travel

for the telescope are. This will prevent the motor from

reaching the focuser limits and straining the motor.

Calibrating the focuser also sets the focuser index

positions so that accurate "Move To" commands

can be executed. The focus motor only needs to be

calibrated during the initial setup or if it is removed

and reinstalled on the optical tube. After calibration,

the focuser limits and index positions are stored in the

focus motor.

To calibrate using a Celestron hand control, press the

MENU button, then select "Focuser, " then "Calibration. "

If using either the Celestron Focuser Utility Program

or Celestron PWI software, calibration can be done

directly from the program's user interface.

If using an ASCOM driver along with third-party

focuser control software, you can calibrate with

the driver. Select "ASCOM focuser" as the focuser,

then for Focuser Settings select "Celestron USB

Focuser. " The calibration routine can then be accessed

from the "Properties" button within the ASCOM

Focuser Chooser.

USING THE FOCUS MOTOR

There are two ways to control the focus motor: the

motor can be manually slewed to change focus or

it can automatically slew to a specific focuser index

position.

If using a Celestron hand control, you can manually

slew the focuser by pressing the MENU button, then

selecting "Focuser", then "Move In/Out". You will then

be prompted to select a motor speed rate, from 1

(slowest) to 3 (fastest). The rates correspond to the

following knob rotation rates:

RATE 1: 8°/sec

RATE 2: 32°/sec

RATE 3: 128°/sec

Then, use the SCROLL DOWN and SCROLL UP

buttons to rotate the focus knob. Specifically, the

SCROLL DOWN button will rotate the focus knob

clockwise, which moves the primary mirror inwards (i.e.

towards the rear cell), and the SCROLL UP button will

rotate the focus knob counter-clockwise, which moves

the primary mirror outwards (i.e. towards the Schmidt

corrector).

ENGLISH

The focus motor can be calibrated using any of the above

methods and will not need to be done again if changing

how the focus motor is controlled. For example, you can

calibrate with a Celestron hand control and then use

third-party software without needing to calibrate again.

When initiated, the calibration routine will slew to

the inward focuser travel limit, then to the outward

travel limit. This process takes several minutes. When

completed, the full range of travel will be indexed

from zero (the inward limit) to 1000x the number of turns

of the focuser knob needed to reach the outward limit.

So, for example, if the focuser knob has a total of 40

turns of travel, the focuser positions will be indexed from

0 to 40,000.