ASTRO-PHYSICS 400QMD Manual de início rápido - Página 5

Procurar online ou descarregar pdf Manual de início rápido para Telescópio ASTRO-PHYSICS 400QMD. ASTRO-PHYSICS 400QMD 11 páginas. German equatorial mount with dual axis quartz micro-drive

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ASSEMBLE CRADLE PLATE

Attach the cradle plate to the top of the declination axis with the four ¼-20 screws provided with the mount. When you

have finished your observing session, the cradle plate may remain attached to the declination axis or removed as

desired.

ASSEMBLE COUNTERWEIGHT SHAFT

IMPORTANT: Always attach the counterweights before mounting the telescope to prevent sudden

movement of an unbalanced tube assembly, which may cause damage or injury.

1. Thread counterweight shaft onto the Dec. axis.

2. Remove the hand knob and washer from the base of the counterweight shaft. Add sufficient counterweights (6 or

9 lb. counterweights are available) to the counterweight shaft to balance the telescope you intend to use. Always

use two hands to attach or move them on the shaft. Reattach the hand knob and washer to the end of

counterweight shaft. This will help to prevent injury if someone accidentally loosens the counterweight hand

knob.

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.

When you remove the counterweight shaft, a threaded black anodized piece may remain attached to your

counterweight shaft. This is of no concern as it can be threaded back onto the mount.

OPERATION OF THE MOUNTING

You can move your telescope to various objects either by grasping the telescope tube and moving it manually or by

pressing the buttons on the controller.

Clutch Knobs: There are two black anodized knobs, one located on the R.A. axis and the other on the Dec. axis. If

the knobs are loosened, the axes can be swung around freely. If the telescope is properly counterbalanced, the

clutches can be left partially engaged. This will allow you to move the telescope easily without constant clamping and

unclamping the axes. For astrophotography, snug up a bit more. Please do not over-tighten these knobs. If the

knobs are very tight and you try to move the telescope manually by grasping the tube (as you probably do habitually),

you will place severe strain on the driving gear teeth. This word of caution is true of any mount.

Balancing Your Telescope: For proper operation, the telescope must be adequately counterbalanced. Start by

balancing the tube assembly. Tighten the black R.A. axis clutch clamp; loosen the black Dec. axis clutch clamp so

that the telescope tube rotates on the declination axis. If you are using the dovetail plate, loosen the two side knobs

and move the sliding bar, with scope attached, forwards and backwards. If you are not using the dovetail plate,

loosen 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 clutch clamp and loosen the R.A. clutch clamp. 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 precisely. A small amount of imbalance on the East side is permissible and even desirable for

astrophotography and imaging.

When the mount is properly aligned, it is possible to take unguided astrophotos for several minutes without trailed star

images.