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望遠鏡 ASTRO-PHYSICS 400GTOのPDF 組立説明書をオンラインで閲覧またはダウンロードできます。ASTRO-PHYSICS 400GTO 13 ページ。 German equatorial with servo motor drive

A firm tightening of the counterweight knob will not damage the surface of the counterweight shaft. The pin that tightens

against the stainless counterweight shaft is constructed of brass. Likewise, the bronze sleeve that has been press fit into

the center of the counterweight will prevent marring of the shaft as you move the counterweights.

Attach Mounting Rings

Our flat plates are constructed with keyhole slots at the location where your mounting rings attach. This feature enables you

to partially loosen the screws on your rings just enough to insert them into the larger part of the keyhole, then slide the rings

to the narrow part and tighten them with a hex key. You can even accomplish this with the rings on the scope, although this

maneuver may be difficult to accomplish with a large, heavy instrument. We prefer this keyhole method to the standard way

of completely removing the screws and possibly dropping them in the grass.

If you are using a dovetail plate (DOVE08, DOVE15, and DOVELM) on your mount, you will attach your mounting rings to

the corresponding sliding bar.

There are two clutch knobs on either side of the right ascension and declination axes. The R.A. and declination motors will

not drive the axes until these clutch knobs are engaged. We recommend that you turn the knobs enough to engage the

motors while still allowing you to move the scope by hand. It is not necessary to tighten the knobs with force.

For proper operation, the telescope must be adequately counterbalanced. Start by balancing the tube assembly.

Tighten the R.A. axis clutch knobs and loosen the Dec. axis clutch knobs so that the telescope tube rotates on the

declination axis. Be careful because if your telescope is significantly out of balance, it may swing rapidly in the out

of balance direction.

If you are using a dovetail plate, loosen the two side knobs and move the sliding bar, with scope attached,

forwards and backward. If you are not using the dovetail plate, loosen the hand knob on the mounting rings and

slide the tube up or down. The scope is balanced when it stays level with no clutch drag.

Now, tighten the declination axis with the dec. clutch knobs and loosen the R.A. clutch knobs.

Move the counterweights up or down to achieve balance in R.A.

Remember to allow for the extra weight of diagonals, eyepieces, and finderscopes. If the scope moves by itself,

even when the clutches are loose, the scope is not fully counterbalanced. A small amount of imbalance is

permissible.

(purchased separately

)