Celestron 94155 Buku Petunjuk - Halaman 6

Jelajahi secara online atau unduh pdf Buku Petunjuk untuk Aksesori Celestron 94155. Celestron 94155 7 halaman. Focus motor for sct & edgehd

FOCUS MOTOR FOR SCT & EDGEHD INSTRUCTION MANUAL

BACKLASH SETTINGS

When changing direction of the focus motor, you may

notice a little bit of backlash in the telescope's focus. This

means that the motor is turning a bit before the focus of

the telescope changes. This will typically manifest itself

when critically focusing on a star using the slowest motor

speed rate. You can compensate for this backlash with

the backlash setting.

In the Celestron hand control, the backlash setting can

be found by pressing the MENU button, then selecting

"Focuser, " then "Backlash. " For the Celestron Focuser

Utility Program or Celestron PWI, there is a Backlash

Settings slider in the user interface. The backlash setting

can be set from 0-99.

To fi nd the best backlash setting, fi rst acquire a bright

star in your telescope's fi eld of view and roughly focus it.

Next, set the motor speed rate to its slowest setting and

defocus the star using one of the hand control's SCROLL

buttons, or the MOVE IN or MOVE OUT command from

the computer program. Defocus the star until you can

PORT COVERS

To best protect the focus motor, keep the tethered covers

on the ports when not in use. When the ports are in use,

the covers can be hooked onto the posts on the side of

the focus motor to keep them from dangling.

ENGLISH

clearly see the out-of-focus "doughnut" star image. Now,

reverse direction of the focus motor. If the defocused

star image immediately starts becoming smaller, then

the backlash setting should remain at 0 (i.e. the default

setting). If you notice a bit of time elapsing before the

image begins changing, then increase the backlash

setting. Repeat this procedure until the focus of the

telescope immediately changes when changing direction

of the focus motor. If you set the backlash setting too

high, you will notice the focus rapidly changing as soon

as you change directions, and it may "overshoot" your

desired focus. If this occurs, decrease the backlash

setting.