20.02.2013 Views

Paramount GT-1100 Robotic Telescope Mount

Paramount GT-1100 Robotic Telescope Mount

Paramount GT-1100 Robotic Telescope Mount

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

<strong>Paramount</strong> User’s Guide page 33<br />

Figure 21 – Remove these four screws to access the azimuth nosepiece. (View of<br />

bottom of the mount.)<br />

Next, remove the four hex screws that hold the nosepiece in place. You'll see the additional<br />

sets of mounting holes beneath this piece. Remount the nosepiece in the holes that give you<br />

the desired azimuth adjustment.<br />

<strong>Paramount</strong> ME Quick Polar Alignment Method<br />

The <strong>Paramount</strong> ME contains homing sensors that can be used aid in the first step in polar<br />

alignment. Each time the <strong>Paramount</strong> ME is homed, it returns to the exact same position (i.e.<br />

to an encoder tic, or a fraction of an arcsecond). This position is very near hour angle 2.0<br />

and declination 0.0. This is a point two hours west of the Meridian on the celestial equator.<br />

Though the mount does home to the exact same position each time, it is not precisely at<br />

hour angle 2.0000 and declination 0.0000. This is in part due to consistency of the position<br />

of the emitter-detector pair in the sensors used. Additionally, if the main optic of the system<br />

is used for star sighting, it will have inherent non-perpendicularity errors. Therefore, the<br />

following procedure can be deemed “very good” as far as estimating polar alignment, but the<br />

full procedure using TPoint will refine the alignment to the desired level of accuracy.<br />

However, if you are consistent in attaching your OTA to the ME, you will find that this<br />

procedure will be very accurate each time the ME is set up. When the star-sync is performed,<br />

it represents a calibration of many of the errors.<br />

Step 1 – Level the mount, and set the altitude and azimuth as close as possible.<br />

A level mount is not required for extremely precise operation, but it is necessary for the<br />

purposes of the following alignment procedure. Using the gradations on the side of the<br />

wedge assembly, estimate the altitude based on the latitude of the observing site.<br />

Step 2 – Home mount with the proper date/time information in TheSky.<br />

By homing the mount from TheSky software with the proper time and date information, the<br />

Local Sidereal Time (LST) will be computed and therefore the position of the telescope, if it<br />

were aligned properly with the pole, is known to within ± 10 arcminutes.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!