Meade SN-10 AT Manual de instrucciones descargar pdf (Pagina 7)

Youre combining mechanical improvement of tripod with

telling the Autostar (via SYNC) that youre changing

things. Its another approach which can yield accuracies

approaching drift alignment, and much faster.

You could toss in a few GoTos other bright stars (or fun

DSOs) in the midst of this to stay awake and enthralled.

But Arcturus and Polaris are a good pair for this trick.

MEASURING GOTO ACCURACY: Dont use the Moon and Plan-

ets as measures of the GOTO accuracy (and dont SYNC

on them)... they are -calculated- positions, versus the fixed

data of the background stars. And those calculations can

occasionally be a little (or a lot (20 arcmin?)) off, depend-

ing upon our relative orbital positions.... the Moon is a re-

ally complex problem...)

Courtesy of: Dick Seymour

MOVING T HE SCOPE WITHOUT GOTO: If you want RA tracking

without GoTo alignment, just pick Setup >Targets > As-

tronomical and the RA motor starts running at the side-

real rate. Then just move the scope manually, using the

clutches to track an object as desired.

Courtesy of: CS - Otto

ALIGNING, CALIBRATING & MORE: The Polar mount of the

LXD55 wants to be carefully, mechanically aimed at the

celestial pole. The better its aimed, the better it will do.

But itll do OK if its a little bit off (little bit is propor-

tional to how much mis-aiming youre willing to live with...

there are nights im happy if my LX200gps arrives within

2 degrees (4 full moon widths) of a target in Polar.) Alt/Az

mounts are -much- easier to set up... an ETX 90/105/125

(or any of the DS-scopes) is almost plop and go for get-

ting started. The LXDs German Equatorial Mount (GEM)

isnt that simple. The Autostar -can- correct for moderate

errors in setup.. probably 5 degrees are easily within its

grasp... but youll have to help it along in those situations.

Lets hit Calibration first: its very simple: just hit the

[mode] key when its asking to Align, (so you see SETUP /

Align on the screen)... now use the scroll down key to reach

SETUP / Telescope. Press [enter]. Now youre seeing Tele-

scope /Telescope Model. Press the scroll down key until

you see Calibrate Motor (or Calibration, i forget which).

Press [enter]. The scope will make two short moves, and

thats it. Youve calibrated. Turn off the power, count to

five, then power back up. Do a normal start up sequence...

Lets play with Polar Easy or Polar Two Star alignment:

Dont worry if an alignment star does -not- arrive in the

field of view when the Autostar slews to where it guesses

it is. Just use the keys to bring it to the center of the field

of view, and then press [enter]. If the guess was way off,

feel free to tap a speed key to hurry the procedure along.

After you have done that to the two alignment stars, the

Autostar -will- factor in how far off the tripod is, and will

(hopefully) slew to your targets with reasonable accuracy.

Dont sweat it if it misses the Moon and Planets by a bit...

it has to calculate their orbits, and sometimes gets a bit

off. The stars (and deep space objects) are the true bell-

wether of how well your alignment was.

So now lets GoTo a star... how about Capella? Its the bright

one in the northwest. (Star > Named > Capella [enter]

[goto]). After it beeps, if its not well centered, do this: Press

the [enter] key for 3 seconds. Release. The scope will ask

you to center the object. Now use the slew (and speed) keys

to center it. Now tap the [enter] key again. The Autostar

will say synchronized. Youve just corrected its idea of

whats where for that area of the sky. You can now visit

nearby objects, and the scope will probably do a decent job

of centering them. If you slew someplace far away (Leo,

use Regulus), and if things arent centered to your liking,

do the press-hold-release-center-tap sequence over and

things should get better.

The Autostar really -can- cover for quite a bit of misalign-

ment of the tripod/latitude/polar-axis. But its a learning

experience. Alignment -will- come with practice (or some-

times, pure luck). But GEM is -not- drop-dead simple to

set up, and has a moderate learning curve. While youre

wandering up the curve, youll still have a chance to see

fascinating things through the scope.

Courtesy of: Dick Seymour

POINTING NORTH WHEN POLARIS IS HIDDEN: I bought a compass

for partly cloudy nights when Polaris is obscured. Read

the compass on a clear night when pointing at Polaris and

use that value to point your tripod and mount on partly

cloudy nights. Its usually good enough for viewing. Ive

done this when I take my scope across town and do not

have a mark on the ground for my tripod legs.

Courtesy of: Jason Carden

POLARSCOPE AND OTA HINTS FOR BETTER ALIGNMENT: Loosen

the 3 allen screws in the collar between the hours circle

and the reticle housing. Slide the polar scope out of the

polar shaft. Look for some tape wrapped around the polar

scope. I removed it on mine because it was shredded and

rolled into a clump in more than one area. I reassembled

mine without any tape in this area. Next, look inside the

collar for an O ring. Make sure the O ring is intact because

it centers the polar scope in the collar. Now slide the

polarscope back into the collar and just barely snug the

allen screws. If the polar eyepiece fits loosely, two wraps of

white teflon plumbers tape on the eyepiece threads will

snug it up nicely.

Next, I set my mount on the tripod in alt/az position (No

counter weight or scope) and sited in on a stop sign about

a mile away. Look through the polarscope eyepiece while

rotating the RA shaft back and forth from position A to

position B (Page 49, Fig 38 & 39 in the manual) After some

trial and error I was able to rotate from A to B adjusting

1 2 3 4 5 6 7 8 9 10 11 12 ... 17 18

Comentarios a estos manuales

Sin comentarios

Meade SN-10 AT Manual de instrucciones Pagina 7

Comentarios a estos manuales

Relacionado con productos y manuales para Telescopios Meade SN-10 AT