iOptron CEM70 Instruction Manual page 19

For CEM70G, plug a USB cable into the USB3.0 port on the rear end of the mount RA axis or on the
base panel to connect the iPolar to a computer.
For CEM70/CEM70EC, plug a USB cable into the iPolar port on the rear end of mount RA axis to
connect the iPolar to a computer.
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
Polar Alignment Software
There are quite a few alignment software available or polar alignment, such as PHD2 guiding,
TheSky software, PemPro, or Alignmaster.
BrightStar Polar Alignment/Polar Iterate Align
BrightStar Polar Alignment allows you to polar align the mount even if you cannot view the
Celestial Pole.
(1) Level the CEM70 mount and set it at Zero Position. Make sure the telescope is parallel to the
pole axis (R.A. axis) of the mount. If a finder scope is used, adjust it to be parallel to the
telescope optical axis. Turn the mount power on.
(2) Pressing MENU=>"Alignment"=>"Polar Iterate Align". The HC will display the azimuth and
altitude position of several bright stars near meridian. Select one that is visible with high altitude
as Alignment Star A. Follow the HC instruction to move the Star A to the center of the eyepiece
with the combination of Latitude Adjustment Knob and "◄" or "►" button. Press ENTER to
confirm. Next, select a bright star that is close to the horizon as the Alignment Star B. Center it
or
Figure 23. Connect CEM70G iPolar to a computer
Figure 24. Connect CEM70/EC iPolar to a computer
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