User's Manual

Position. Loosen the DEC and R.A. Gear Switches in turn to adjust the mount to the Zero Position.

Engage the clutches after each adjustment.

STEP 11. Perform Polar Alignment

Polar Alignment with iPolar Electronic Polar Scope

CEM40 are equipped with an iPolar

electronic polar scope. To perform polar alignment, please refer

to Appendix C. It is simple and fast, even the pole star or part of the sky is blocked. Steps are briefly

outlined below:

 Download and install iPolar Software (first time use)

 Connect a USB cable between the iPolar port on the mount and a computer USB port

 Calibrate the iPolar Rotation Center (first time use)

 Start polar alignment by following on screen instructions

BrightStar Polar Alignment

If you can’t use the iPolar for some reason, you may use the drift alignment for precise polar alignment.

Or may use two bright stars with Polar Iterate Align to do a polar alignment.

(1) Level the mount and set it to the Zero Position. Align the telescope to the R.A. axis of the

mount. If a finder scope is used, adjust it to be parallel to the telescope optical axis.

(2) Use the HC (MENU => “Alignment” => “Polar Iterate Align”) to display the azimuth and

altitude position of several bright stars near the meridian. Select one that is visible at a high

altitude as Alignment Star A. Follow the HC instruction to move Alignment Star A to the

center of the eyepiece using a combination of the Latitude Adjustment Knob and the “◄” or

“►” buttons. Press ENTER to confirm when the star is centered. Next, select a bright star

that is close to the horizon as Alignment Star B. Center it using the Azimuth Adjustment

Knob and the “◄” or “►” button (the “▲” and “▼” buttons are not used here). Press ENTER

to confirm the settings.

(3) The telescope will now slew back to Alignment Star A. Repeat the steps above. The iteration

can be stopped when it is determined that the alignment error has been minimized. Press

the BACK button to exit the alignment procedure.

NOTE: It is highly recommended to use an eyepiece with an illuminated crosshair for accurate

centering.

NOTE: The movement of the alignment star in your eyepiece may not be perpendicular depending on

its location in the sky.

STEP 12. Returning the Mount to Zero Position

After polar alignment and balancing OTA, return the mount to the Zero Position. Please check the zero

position after set up the mount or firmware update.