ASTRO-PHYSICS GTO KEYPAD Addendum - Page 7

Browse online or download pdf Addendum for Keypad ASTRO-PHYSICS GTO KEYPAD. ASTRO-PHYSICS GTO KEYPAD 10 pages. Plus supplemental information for customers outside of north america and the revised gto quick star drift method of polar alignment

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4.● Choose the same star again, beginning from the Objects Menu, and press GOTO. ●Now●the●telescope●will●swap●

sides.●The●star●will●(hopefully)●appear●again●in●the●finderscope●eyepiece,●but●may●be●displaced●both●in●RA●and●DEC●on●

the●crosshairs.●●●

5.● Make altitude adjustments.

a)● The RA (east/west) error is a function of the

orthogonality of the finderscope.●To●make●the●

rest●of●the●process●easier,●we●will●adjust●this●out.● ●

Move●one●half●of●the●E-W●distance●to●the●N-S●

crosshair●with●the●E●or●W●direction●button.

b)● Use the finerscope's adjustment screws to

finish the movement onto the N-S crosshair.●●●

Try●to●only●adjust●the●finder●in●the●E-W●direction.● ●

Do●not●move●it●north●or●south.

c)● Use the mount's altitude adjustment to bring

the star half way toward the center of the

reticle in the N-S direction.

d)● Center the star the rest of the way using the N-S buttons.

e)● Press the Recal button #9 again in the RA/DEC/REV Menu. You●will●hear●a●beep●letting●you●know●you●re-cali-

brated.●●●(Any●time●you●use●the●keypad's●direction●buttons●to●center●an●object,●it●is●a●good●idea●to●re-calibrate.)

f)● Set the Meridian Delay display back to <0W>.●Press●MENU●to●return●all●the●way●back●to●the●Objects●Menu.

g)● Enter the same star again and press GOTO.●

The●scope●will●again●swap●sides●and●acquire●

the●star●on●the●crosshairs.●Repeat●the●mechani-

cal●alignment●procedure●until●the●star●remains●

on●or●close●to●the●crosshair.●●Each●time●you●

make●an●adjustment,●move●half●the●distance●

with●the●altitude●adjuster●(5-c)●and●half●with●the●

N-S●buttons●(5-d).●●●Likewise●for●any●remaining●

orthogonality●error●–●half●with●the●buttons,●half●

with●the●finder's●adjustment●screws.●●●Then●do●

the●re-calibration●on●the●keypad●(5-e)●before●do-

ing●the●next●meridian●swap●(3).●●

●