iOptron CEM70 Instruction Manual
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iOptron CEM70 Instruction Manual

Center-balanced equatorial mount
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iOptron
CEM70 Center-Balanced Equatorial Mount
Instruction Manual
Product CEM70(#C70A), CEM70G(#C70AG) and CEM70EC(#C704A0)

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Summary of Contents for iOptron CEM70

  • Page 1 ® iOptron CEM70 Center-Balanced Equatorial Mount Instruction Manual Product CEM70(#C70A), CEM70G(#C70AG) and CEM70EC(#C704A0)
  • Page 2 Please read the included CEM70 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount.

  • Page 3: Table Of Contents

    1. CEM70 Introduction ..........................5 2. CEM70 Terms ............................6 2.1. Parts List ............................6 2.2. Identification of Parts ........................7 2.3. CEM70 Mount Ports ......................... 7 ® 2.4. Go2Nova 8407+ Hand Controller ....................10 2.4.1. Key Description ........................10 2.4.2.
  • Page 4 Appendix H. Computer Control a CEM70 Mount ..................57 IOPTRON TWO YEAR TELESCOPE, MOUNT, AND CONTROLLER WARRANTY ...... 58 Ver. 2.1 2021.02 iOptron reserves the rights to revise this instruction without notice. Actual color/contents/design/function may differ from those described in this instruction manual.

  • Page 5: Cem70 Introduction

    The CEM70's performance is demonstrated by its low periodic tracking error: <±3.5 arc seconds for CEM70 and CEM70G, and <0.3 arcsec RMS for CEM70EC. Along with the stability aspect, the CEM70 features an advanced cable management system consisting of more ports in more locations preventing tangle ups and reducing the chance of fractured cables.

  • Page 6: Cem70 Terms

    2.1. Parts List SHIPPING CONTENTS Your new CEM70 mount comes in two shipping boxes. One box contains a CEM70 (#C70A), CEM70G (#C70AG) or CEM70EC(#C704A0) mount head, counterweight shaft, hand controller, and accessories. The other box contains one 21lb (9.5kg) counterweight (#7226). The contents are: ...

  • Page 7: Identification Of Parts

    2.3. CEM70 Mount Ports CEM70 and CEM70EC On Mount Base Main Panel: The main cable connection ports of a CEM70/CEM70EC are shown in Figure 2. Figure 2. Ports on a CEM70 mount base  DC 12V 5A: DC power socket to power the mount (2.5mmX5.5mm, 5525) ...
  • Page 8 Figure 3. Ports on CEM70 dovetail saddle  iPORT: Auxiliary port for connecting to other iOptron accessories, such as an electronic focuser or for observatory dome control. DO NOT plug ST-4 guiding camera cable into this port. It will damage the guide camera electronics.
  • Page 9 Figure 7. Ports on CEM70G dovetail saddle  iPORT: Auxiliary port for connecting to other iOptron accessories, such as an electronic focuser or for observatory dome control. DO NOT plug ST-4 guiding camera cable into this port. It will damage the guide camera electronics.

  • Page 10: Go2Nova 8407+ Hand Controller

    8407+ hand controller (HC) shown in Figure 8 is the standard controller used on the CEM70 mount. It has an integrated heater that ensures the LCD display will work at the temperature as low as -20ºC (-4ºF). It has a large LCD screen, function, direction, and number keys on the front; a red LED reading light on the back;...

  • Page 11: The Lcd Screen

     Serial port: connect the HC to a computer via a RS232 to 4P4C RJ9 cable. The pin-out of the serial port is shown in Figure 9. Figure 9. Serial port pin-out on an 8407+ hand controller 2.4.2. The LCD Screen The 8407+ HC has a large 8-line, 21-character per line, LCD screen which displays information on the status of the mount as shown in Figure 10.The user interface is simple and easy to operate.

  • Page 12: Check The Battery

     Stop: mount is not moving;  Slew: mount is moving with an arrow key is pressed or a GOTO command, such as “Select and Slew” or “Goto Zero Position”;  Tracking: mount is at a tracking status. 10. GPS status: “GPS ON” indicates the mount is connected to its GPS receiver and is seeking a satellite signal.

  • Page 13: Cem70 Mount Assembly

    Figure 11. Remove the mount STEP 2. Attach the mount The mount has a 152mm base, which can be mounted onto an iOptron Tri-pier, LiteRoc tripod (light payload), or your own tripod/pier with two M8 threaded mounting holes separated 130mm in diameter.
  • Page 14 At very low-latitudes (<10°), you may tilt the CW shaft to accommodate it. There are three screws on CEM70 CW Mounting Housing: A Shaft Locking Screw, a Shaft Position Screw on the other side, and a Low-Latitude Set Screw, as shown in Figure 18.
  • Page 15 You may need more CW for heavier payloads, or a smaller CW for lighter scopes. CEM70 is equipped with a Vixen/Losmandy-D dual saddle. It can receive either a Vixen or a Losmandy-D plate. Release the dovetail saddle locking knobs and slide the telescope dovetail plate into the...
  • Page 16 For a CEM70G mount, connect USB3.0 port a computer for computer control, iPolar, iGuider and 3X USB port hub connection. For a CEM70/CEM70EC mount, Connect USB port to a computer for computer controll. CEM70 does not have a built-in WIFI.
  • Page 17 STEP 8. Setup Hand Controller The CEM70 mount is equipped with a GPS receiver which will receive the UTC time, longitude and latitude information for your current location from satellites after a link is established. However, there are still some parameters need to be entered to reflect your location, such as time zone information and whether daylight saving time is currently in effect.
  • Page 18 DEC and R.A. Gear Switches in turn to adjust the mount to the Zero Position. Engage the clutches after each adjustment. STEP 10. Polar Alignment In order for an equatorial mount to track properly, it has to be accurately polar aligned. CEM70G and CEM70 are equipped with an iPolar electronic polar.
  • Page 19 Figure 23. Connect CEM70G 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.
  • Page 20 using the Azimuth Adjustment Knob and “◄” or “►” button (The “▲” and “▼” buttons are not used here). Press ENTER to confirm. (3) The telescope will now slew back to Star A to repeat above steps. The iteration can be stopped when it is determined that the alignment error is at the minimum.

  • Page 21: Getting Started

    4.1. Setting the Mount and Performing Polar Alignment Assemble your CEM70 mount. Make sure the mount is leveled. Mount an OTA and accessories, and carefully balance the mount on both R.A. and DEC axes. Turn the mount power switch on. When the GPS receiver is connected to satellites, the hand controller LCD will display GPS OK and the mount will have the correct time and site information (this can also be entered manually as previously described).

  • Page 22: Power-Down Memorization

    4.6. Power-Down Memorization The CEM70 mount can memorize its R.A. and DEC positions if the mount loses its power by accident, even during high speed slewing. After the power is back, just do a Select and Slew to the same star when the power is lost.

  • Page 23: Complete Functions Of Go2Nova 8407+ Hand Controller

    ® 5. Complete Functions of Go2Nova 8407+ Hand Controller 5.1. Select and Slew Press MENU => “Select and Slew.” Select an object that you would like to observe and press the ENTER key. ® 8407+ hand controller has a database of over 212,000 objects. Use the ► or ◄ The Go2Nova buttons to move the cursor.

  • Page 24: Custom Objects

    5.1.7. Custom Objects This allows the storage of up to 73 user-defined comets, and /or up to 64 stars/DSOs. 5.1.8. Customer R.A. and DEC Here you can go to a target by entering its R.A. and DEC coordinates. 5.2. Sync to Target This operation will match the telescope's current coordinates to the Target Right Ascension and Declination.

  • Page 25: Three Star Alignment

    after the mount slews to it. Press ENTER when finished. The hand controller will prompt you to choose a second star. After centering the second star, the two-star alignment is finished. After the two-star alignment, the altitude and azimuth errors will be displayed. This number can be used to fine tune the polar alignment.

  • Page 26: Settings

    5.4. Settings 5.4.1. Set Time and Site Refer to STEP 8 in Section 3. 5.4.2. Beep Settings The Hand Controller allows a user to turn off the beep partially, or even go to a silent mode. To change this setting press “MENU =>Settings =>Beep Settings”, Set Up Time and Site Beep Settings Display Settings...

  • Page 27: Set Tracking Rate

    CEM70G has an integrated guiding camera iGuider for ASCOM pulse guiding. Both CEM70G and CEM70 have an ST-4 guiding port on mount base panel. The ST-4 guide port wiring is shown in Figure 25, which has the same pin-out as that from a Celestron / Starlight Xpress / Orion Mount / Orion Autoguider/ QHY5 autoguider.

  • Page 28: Set Altitude Limit

     “Set Position Limit” will tell the mount when to stop tracking or to do a meridian flip. The limit can be set at from 0° to 10° pass meridian.  “Set Behavior” will tell the mount if a meridian flip will be performed. 5.4.8.

  • Page 29: Reset All Settings

    This function controls an iOptron electric focuser. 5.6. PEC Option This function only works for a standard CEM70 and CEM70G mount. 5.6.1. PEC Playback You can turn “PEC Playback On” to improve tracking accuracy which is especially useful for long exposure astrophotography.

  • Page 30: Park Telescope

    5.7. Park Telescope This function parks the scope to one of four preset park positions. 5.8. Edit User Objects Besides various star lists available in the hand controller, you can add, edit or delete your own user- defined objects. This is especially useful for newly found comets. You can also add your favorite observation object into the user object list for easy sky surfing.

  • Page 31: Firmware Information

    To counter this, the CEM70 has been equipped with a function that can find the Zero Position for an initial mount set up.

  • Page 33: Maintenance And Servicing

    Department. Customer Service hours are from 9:00 AM to 5:00 PM, Eastern Time, Monday through Friday. In the event that the CEM70 requires factory servicing or repairing, write or call iOptron Customer Service Department first to receive a RMA# before returning the mount to the factory. Please provide details as to the nature of the problem as well as your name, address, e-mail address, purchase information and daytime telephone number.

  • Page 34: Appendix A. Technical Specifications

    Declination worm wheel Φ151mm, 248 teeth, M=0.6, zero backlash Worm Φ21.2mm Permanent PEC for CEM70/CEM70G, Real-time PEC for CEM70EC <±3.5 arcsec p-p for CEM70/CEM70G, <0.3 arcsec rms for CEM70EC Worm period 348 sec Counterweight shaft Φ28, 415 mm (SS, 1.9kg) Counterweight 9.5 kg (21 lbs)

  • Page 35: Appendix B. Go2Nova

    ® Appendix B. Go2Nova 8407+ HC MENU STRUCTURE MENU Select and Slew Solar System Mercury Venus Mars Jupiter Saturn Uranus Neptune Moon Deep Sky Objects Named Object Messier Catalog Caldwell Catalog Abell Catalog Herschel Catalog Stars Named Stars Double/Multi Stars SAO Catalog Constellations Comets...
  • Page 36 Alignment Position of Pole Star One Star Align Two Star Align Three Star Alin Polar Iterate Align Solar System Align View Model Error Clear Alignment Data Settings Set Time & Site Beep Settings Display Settings Set Guiding Rates Set Tracking Rate Set Parking Position Meridian Treatment Set Altitude Limit...
  • Page 37 Edit User Objects Custom Comets Add a New Comet Browse Comets Delete One Comet Delete All Comets Other Objects Add a New Object Browse Objects Delete One Object Delete All Objects Firmware Inf ormation Zero Position Goto Zero Position Set Zero position Search Zero position...

  • Page 38: Appendix C. Go2Nova Star List

    ® Appendix C. Go2Nova Star List Named Deep Sky Object 47 Tucanae 47 Integral Sign Galaxy Andromeda Galaxy 48 Iris Nebula Antennae Galaxies 49 Jellyfish Nebula Barnard's Galaxy 50 Jewel Box Cluster Bear-Paw Galaxy 51 Lagoon Nebula Beehive Cluster 52 Lambda Centauri Nebula Black Eye Galaxy 53 Large Magellanic Cloud Blinking Planetary...
  • Page 39 Messier Catalog This table is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article List of Messier objects...
  • Page 40 Named Stars Acamar Alrescha Deneb el Okab Lalande 21185 Achernar Alshain Deneb Kaitos Lesath Achird Altair Denebakrab Mahasim Acrab Altais Denebola Maia Acrux A Alterf Dschubba Marfik Acrux B Aludra Dubhe Marfikent Acubens Alula Australis Edasich Markab Adhafera Alula Borealis El Rehla Markeb Adhara...
  • Page 41 Proxima Centauri Sadalbari Sulafat Vindemiatrix Rasalas Sadalmelik Syrma Vrischika Rasalgethi Sadalsuud Talitha Wasat Rasalhague Sadr Tania Australis Wazn Rastaban Saiph Tania Borealis Regor Sargas Tarazed Wezen Regulus Scheat Taygeta Yed Posterior Rigel Schedar Tejat Posterior Yed Prior Rigel Kentaurus A Seginus Thuban Zaniah...
  • Page 42 Modern Constellations Constellation Abbreviation Constellation Abbreviation Andromeda Lacerta Antlia Apus Leo Minor Aquarius Lepus Aquila Libra Lupus Aries Lynx Auriga Lyra Boötes Mensa Caelum Microscopium Camelopardalis Monoceros Cancer Musca Canes Venatici Norma Canis Major Octans Canis Minor Ophiuchus Capricornus Orion Carina Pavo Cassiopeia...
  • Page 43 Double/Multi Stars HC Item Constellation Name Rigel Kentaurus A Alpha Centauri Centaurus 71683 14396-6050 252838 Rigel Beta Orionis Orion 24436 05145-0812 131907 Gacrux Gamma Crucis Crux 61084 12312-5707 240019 Sargas Theta Scorpii Scorpius 86228 17373-4300 228201 Castor A Alpha Geminorum Gemini 36850 07346+3153 60198...
  • Page 44 HC Item Constellation Name 53 HIP 95771 Alpha Vulpeculae Vulpecula Anser 19287+2440 87261 54 HIP 30867 Beta Monocerotis Monoceros 06288-0702 133316 55 HIP 35363 NV Puppis Puppis 07183-3644 197824 56 HIP 94761 Gliese 752 Aquila Wolf 1055, Ross 652 19169+0510 57 HIP 21683 Sigma2 Tauri Taurus...
  • Page 45 HC Item Constellation Name 105 HIP 40167 Zeta1 Cancri Cancer Tegmen 08122+1739 97645 106 HIP 40817 Kappa Volantis Volans 08198-7131 256497 107 HIP 81292 17 Draconis Draco 16362+5255 30013 108 HIP 80197 Nu1 Coronae Borealis Corona Borealis 16224+3348 65257 109 HIP 88060 HD 163756 Sagittarius 17591-3015...
  • Page 46 HC Item Constellation Name 157 HIP 28790 HD 41742 Puppis 06047-4505 217706 158 HIP 4675 HD 5788 Andromeda 01001+4443 36832 159 HIP 31676 8 Lyncis Lynx 06377+6129 13897 160 HIP 10176 59 Andromedae Andromeda 02109+3902 55330 161 HIP 25950 HD 36408 Taurus 05322+1703 94630...

  • Page 47: Appendix D. Gear Meshing Adjustment

    Appendix D. Gear Meshing Adjustment CEM70 gear is designed adjustable by customer although in most cases not necessary. If you experienced DEC/RA motor stall occasionally, or there is free play between the worm and gear, follow this instruction to adjust the gear meshing. Do not over tighten the gear meshing adjustment screw.
  • Page 48 If you feel there is free play between the worm and gear, you may tighten the gear screw to eliminate it. To Adjust RA Gear: The RA gear meshing adjustment screw is located next to the RA Gear Switch. The adjustment is same as that for DEC gear/worm. Please contact support@ioptron.com if you need more information.

  • Page 49: Appendix E. Polar Alignment Using Ipolar Electronic Polarscope

    For CEM70G, plug a USB cable into the USB3.0 port on the rear end of mount RA axis or on the mount 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.

  • Page 50: Appendix F. Iguider For Cem70G

    1. Focus adjuster locking screw (2mm hex), 2.Focus adjuster, 3.Lens cover The iGuider only support ASCOM guiding. Please follow mount computer control reference to make sure that a proper iOptron Commander/ASCOM Drive is installed based on your mount type. CEM40G/GEM45G and CEM70G uses different Commander/ASCOM Drive. Test the mount computer control before setup the autoguiding.
  • Page 51 Select “iOptron iGuider” camera. PHD2 will fill the pixel size (3.75um) automatically. Enter 120mm into guide scope focal length tab, and click Next. If the program displays the following error, please exit “iOptron iPolar” software. Select correct iOptron ASCOM driver from the dropdown menu. Here “iOptron ASCOM Driver...
  • Page 52 In next Adaptive Optics Device setting window, select None and go to Next. Save the Profile Name. Do not check Build dark library. You may do it at a late time. Click Finish to complete the Profile setup. Connect all the devices.
  • Page 53 (1) Manually slew in DEC to expose the Locking Screw. Loosen it first. (2) Remove iGuider lens cover. (3) Run PHD2 software and select iOptron iGuider Locking Screw (4) Go to a bright star (5) Adjust the Focus Adjuster to bring the star to show in the main window.
  • Page 54 (6) Click on the star to look at the Star Profile. Further fine adjusting the Focus Adjuster to bring the Peak to maximum value. (7) Slew the DEC to expose the Locking Screw if it is blocked by the DEC gear box. Tighten the Locking Screw.
  • Page 55 Number Exposure 0.01s 0.02s 0.05s 0.1s 0.2s 0.5s 1.0s 1.5s 2.0s 2.5s 3.0s 3.5s 3.8s 5. Specifications Guiding scope aperture 30mm Focal length 120mm Imaging sensor 1/3 in CMOS Pixel size 3.75µm Resolution 1280X960 Operation system Windows (driverless)

  • Page 56: Appendix G. Firmware Upgrade

    Appendix G. Firmware Upgrade The firmware in the 8407+ Hand Controller and control boards can be upgraded by the customer. Please check iOptron’s website, www.iOptron.com, under Support Directory/CEM Mounts, select CEM70 for details. The mount firmware is upgraded via USB port on the mount. The hand controller firmware is...

  • Page 57: Appendix H. Computer Control A Cem70 Mount

    A CEM70G mount can be connected to a SmartPhone, a Tablet, or a Computer via the USB and/or WIFI connection A CEM70/CEM70EC mount can be connected to a computer via the USB connection.  Connect to a computer via USB port on the mount main board using a USB cable. You may need to install a FTDI USB to RS232 VCP driver (https://www.ftdichip.com/Drivers/VCP.htm).

  • Page 58: Ioptron Two Year Telescope, Mount, And Controller Warranty

    As a condition to the obligation of iOptron to repair or replace such product, the product must be returned to iOptron together with proof-of-purchase satisfactory to iOptron.

This manual is also suitable for:

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