Meade LX70 Instruções de Operação descarregar pdf

For most telescope observers casual polar alignment is all that is needed,

which will not require use of the polar ﬁ nder. However, for those observers

who need to meet the more demanding requirements of astrophotography,

the polar scope allows the telescope mount to be more precisely aligned

with the celestial poles. The polar scope contains a reticle pattern which

is used in assisting the user in achieving a more accurate polar alignment.

Installing the Polar Scope:

1. Begin by removing the polar axis front and rear covers (see ﬁ gure 1).

2. Remove the rear part of polar axis (see ﬁ gure 2) by rotating it counter-

clockwise. This part will not be used.

3. Thread in the Meade LX70 polar scope until ﬁ rmly seated. The polar

scope is now installed and should remain installed in the mount. When ﬁ n-

ished using the polar scope, replace the front and rear covers.

Before the polar scope can be properly used with any precision, it must ﬁ rst

be calibrated to the mount’s polar axis.

Aligning the Polar Scope to the Polar Axis:

1. Set the telescope mount & tripod up outside in the daytime with the opti-

cal tube, counterweight and counterweight shaft removed.

2. Unlock the DEC axis and rotate it to DEC 0. In this position, the optical

tube (if installed) would be at 90 degrees to the mount. With the DEC axis

in this position and polar scope covers removed, you can now view thru the

polar scope at a distant terrestrial target.

3. Look through the polar viewﬁ nder and notice the reticle pattern (see

ﬁ gure 6). Note, some reticle patterns may appear different but the alignment

procedure is identical. If the reticle is not in focus, rotate the focus ring (ﬁ g

5, #11) until the reticle pattern is sharp.

4. Adjust the mount and tripod so the polar axis is pointing at a distant

terrestrial object. The further the target, the more accurate the alignment.

5. Placing the reticle center cross hair over the target, unlock the RA and

rotate the RA axis 180 degrees, from one side of the mount to the other (see

ﬁ gure 3A & 3B). Re-lock the RA axis.

If the polar scope is not aligned with the mount’s polar axis, the target will

move off center (see ﬁ gure 4A & 4B) and the reticle adjustment screws

(see

ﬁ g 5, #9) will need to be adjusted.

6. To adjust the polar scope so the target does not move off the reticle

cross hair, slightly loosen the reticle adjustment screw which is closest to

the cross hair and opposite of the movement. You then need to tighten the

adjustment screw on the side closest to the target. Notice that a small turn

of each screw will result in a large movement of the reticle. Only adjust the

screws to correct for half the movement off the cross hair at a time, moving

the target approximately halfway to the center of the reticle.

NOTE: The reticle adjustment screws work in a push-pull motion. When

loosening these screws, never loosen more than 1/8 of a turn at a time.

Doing so could cause the reticle to fall out. When one adjustment screw is

loosened, an adjustment screw on the opposite side should be tightened.

Do not over tighten or you may damage the reticle.

7. Next, unlock the RA axis and rotate this axis 180 degrees, back to the

starting point. Re-lock the RA axis. Repeat steps 4-7 until the target no lon-

ger moves off the reticle cross hair.

8. The polar scope is now properly aligned with the mounts polar axis.

Calibrating the Dials and Indicators:

There are several additional parts on the mount and polar scope that need

to be calibrated; the RA setting circle(ﬁ g 5, #3), Calendar-dial scale(ﬁ g 5,

Operating Instructions

The Meade LX70 Polar Scope

For use with all LX70 Series Mounts

Figure 5: Polar Scope Dials

Figure 1: Remove polar covers

Figure 3A: Position A

Figure 3B: Position B

Figure 4A: Aligned when object stays

centered at position A & B

Figure 4B: Misaligned when object

moves o center between position A/B

Figure 2: Remove rear part

1. RA setting circle locking screw

2. RA setting circle indicator

3A. RA setting circle -

(Northern hemisphere users)

3B. RA setting circle -

(Southern hemisphere users)

4. Calendar-dial scale

5. Longitude offset scale

6. Longitude-offset scale indicator

7. Longitude indicator locking set-screw

8. Assembly set screw (not used)

9. Reticle adjustment screws (3)

10. Polar scope

11. Focusing ring

Remove

1 2

Resumo do Conteúdo

Página 1 - The Meade LX70 Polar Scope

For most telescope observers casual polar alignment is all that is needed, which will not require use of the polar ﬁ nder. However, for those observer

Página 2 - Using the Polar Scope:

#4), and Longitude-offset indicator (ﬁ g 5, #6). All are located adjacent to the polar scope. For the part locations of these dials, see ﬁ gure 5. To

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Meade LX70 Instruções de Operação

Consulte online ou descarregue Instruções de Operação para Telescópios Meade LX70. Meade LX70 Operating Instructions Manual do Utilizador

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