iOptron HEM27 Instruction Manual
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iOptron HEM27 Instruction Manual

Hybrid stain wave goto equatorial mount
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iOptron
HEM27
Hybrid Stain Wave GoTo Equatorial Mount
Instruction Manual
Product HEM27 and HEM27EC

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Summary of Contents for iOptron HEM27

  • Page 1 ® iOptron HEM27 Hybrid Stain Wave GoTo Equatorial Mount Instruction Manual Product HEM27 and HEM27EC...
  • Page 2 Instruction Manual for details. Please hold the mount/scope when disengaging the gear switch. Any worm system damage due to improper operation will not be covered by iOptron’s limited warranty. If you have any questions please contact us at support@ioptron.com WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye.

  • Page 3: Table Of Contents

    2.4.2. The LCD Screen ..........................9 2.5. Install and Check the Hand controller Battery ..................10 2.6. Bench Testing the Mount ........................11 3. HEM27 Mount Assembly ..........................12 4. Getting Started .............................. 20 4.1. Setup the Mount and Polar Alignment ....................20 4.2.
  • Page 4 Appendix F. Go2Nova Star List ........................41 IOPTRON TWO YEAR TELESCOPE, MOUNT, AND CONTROLLER WARRANTY ......50 Ver. 1.0 2022.06 iOptron reserves the rights to revise this instruction without notice. Actual color/contents/design/function may differ from those described in this instruction.

  • Page 5: Hem27 Overview

    212,000+ object database! A HEM27 mount can be controlled by a computer, either via ASCOM/Commander for a Windows PC or a third party INDI driver for MacOS software; a SmartPhone/Tablet via iOptron Commander Lite or an App like SkySafari;...

  • Page 6: Hem27 Terms

    HEM27 mount (#HEM27) ® iOptron HEM27 mount head with iPolar (#HEM27A), or ® iOptron HEM27 mount head with high precision encoder and iPolar (#HEM27EC)  ® Go2Nova 8409 Hand Controller with USB port  Internal iPolar electronic polar scope (HEM27A or HEM27EC) ...

  • Page 7: Identification Of Parts

    ALT Locking Screws CW Shaft Thread Hole RA Axis/Polar Axis AZI Adjust. Screws ALT Adjust. Screw AZI Locking Screws DEC Axis Carbon Fiber Tripod (Optional) Figure 1.HEM27 mount assembly 2.3. HEM27 Port On the Mount: Figure 2. Ports on a HEM27 mount...

  • Page 8: Go2Nova 8409 Hand Controller

    8409 hand controller (HC) shown in Figure 5 is the standard controller used on the HEM27 mount. It has a large LCD screen, function, direction, and number keys on the front; and an HBX (6- pin) and a USB port at the bottom.

  • Page 9: Key Description

    0 Key: Stop the mount during GOTO. Also toggling between starting and stopping tracking.  HBX (Handbox) port: connect the HC to the HEM27 mount using a 6P6C RJ11 cable.  USB port: connect the HC to a computer for firmware upgrade and computer control.

  • Page 10: Install And Check The Hand Controller Battery

    Zero Position: Mount is at Zero Position. When set the mount at Zero Position physically, the hand controller should display the same. 2. GPS Status: Indicates if there is GPS or GPS is connected to the satellite. HEM27 does not have a GPS. The GPS status will be always OFF.

  • Page 11: Bench Testing The Mount

    Figure 8. Install a CR2032 battery If the hand controller can’t display the correct date and time, most likely the battery is installed wrong, or power is low and needs be replaced. 2.6. Bench Testing the Mount Plug in the power and hand controller and turn the power on. Now you can bench test the mount manually.

  • Page 12: Hem27 Mount Assembly

    3. HEM27 Mount Assembly NOTE: The HEM27 mount is a precision astronomical instrument. It is highly recommended that you read the entire manual and become familiar with the nomenclature and function of all components before starting the assembly. Step 1. Set up tripod The mount has a 102mm base.
  • Page 13 Step 3. Adjust latitude Without any payload, slightly loosen the 4x Latitude Locking Screws. Use the Latitude Adjustment Knob to set the correct latitude value, as displayed in the Latitude Mark Window. Insert the Allen wrench into the Latitude Adjustment Knob for more turning torque. Lat.
  • Page 14 Step 4. Install telescope HEM27 accepts a Vixen or a Losmandy-D dovetail mounting plate. The default is Vixen-type one. Release the dovetail Saddle Locking Lever and slide the telescope dovetail plate into the saddle with Gear Switch disengaged. Make sure that the arrow sign on the saddle is pointing forward. Tighten the Saddle Locking Lever.
  • Page 15 Figure 14. Convert dovetail saddle to accept a Losmandy-D plate (2) (4) Put the dovetail saddle back and retighten the four yellow circled screws. Here is a dovetail saddle that can receive a Losmandy-D dovetail bar. Figure 15. Dovetail saddle for Loasmandy bar Step 5.
  • Page 16 Step 6. Balance payload No RA balance is needed for a HEM27 mount. Turn the mount power on. Press number 9 to change the slew speed to max. Press ◄ or ► button to slew the telescope to one side of the mount. Hold the telescope and disengage DEC Gear Switch to check the balance.
  • Page 17 MENU=>Zero Position =>Set Zero Position. Press ENTER to confirm. STEP 8. Set hand controller HEM27 mount does not equipped with a GPS receiver. Hence one need to manually enter the GPS location or sync it from the App To set up the controller, turn the mount power ON. Press MENU=> “Settings”: Select and Slew Sync.
  • Page 18 Set Local Time Use the ◄ or ► key to move the cursor _ and use the number keys to change the numbers. Use the ▲ or ▼ button to toggle between “Y” and “N” for Daylight Saving Time, or “+” and “-“ for UTC (Coordinated Universal Time) setting.
  • Page 19 NOTE: The movement of the alignment star in your eyepiece may not be perpendicular depending on its location in the sky. iPolar Polar Alignment For a HEM27 with an iPolar, refer to iPolar Operation Manual from iOptron’s website to perform the polar alignment, or steps briefly outlined below: ...

  • Page 20: Getting Started

    4.1. Setup the Mount and Polar Alignment Assemble your HEM27 mount according to Section 3. Mount an OTA and accessories, and balance the mount in DEC. Turn the mount power switch on. Check the date and site info. Perform polar alignment.

  • Page 21: Star Identifying Function

    4.6. Power-Down Memorization The HEM27 mount can memorize its R.A. and DEC positions if the mount power is lost during operation, 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 22: Complete Functions Of Go2Nova 8409 Hand Controller

    5. Complete Functions of Go2Nova 8409 Hand Controller NOTE: Not all functions from the 8409 hand controller are available for a HEM27 mount. 5.1. Slew to an Object Press MENU => “Select and Slew.” Select an object that you would like to observe and press the ENTER key.

  • Page 23: User Objects

    5.3.1. Pole Star Position ® This function displays the position of the Pole Star for Quick Polar Alignment using the iOptron AccuAlign polar scope. In the Northern Hemisphere the position of Polaris is displayed, while in the Southern Hemisphere the position of Sigma Octantis is shown.

  • Page 24: Two Star Polar Align

    5.3.3. Two Star Polar Align Two Star Polar Align can improve the accuracy of the mount’s polar alignment. Press MENU => “Alignment” => “Two Star Polar Align.” A list of alignment stars that are above the horizon is computed based on your local time and location. With the mount at the Zero Position, use the ▲ and ▼ buttons to select the first alignment star and press ENTER.

  • Page 25: Clear Alignment Data

    5.3.8. Clear Alignment Data This will clear all alignment data created during one star, two star or three star alignment process. 5.4. Settings 5.4.1. Set Time and Site Refer to STEP 8 in Section 3. 5.4.2. Set Beep 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 =>...

  • Page 26: Set Parking Position

    If you have an autoguider which has a pin-out the same as the ST-I from SBIG, such as Meade/ Losmandy/ Takahashi/ Vixen, make sure a proper guiding cable is used. Refer to your guiding camera and guiding software for detailed operation. WARNING: DO NOT plug your ST-4 guiding camera cable into the HBX port.

  • Page 27: Set Ra Guiding (Hem27Ec Only)

    There will be no meridian flip when pass the meridian. 5.5. PEC Option This function only works for the HEM27/HEM27A mount. 5.5.1. PEC Playback You can turn “PEC Playback On” to improve tracking accuracy. The default status is “PEC Playback Off”...

  • Page 28: Edit User Objects

    5.6. 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. Up to 60 comets and other user objects can be stored.

  • Page 29: Firmware Information

    Enter R.A. and DEC R.A.: 00h00m00s DEC: +00d00m00s You may enter the R.A. and DEC coordinates of the object you want to store, and press ENTER to confirm. A more useful application of this function is to store your favorite viewing objects before heading to the field.

  • Page 30: Maintenance And Servicing

    Customer Service hours are 9:00 AM to 5:00 PM, Eastern Time, Monday through Friday. Call in the U.S. 1.781.569.0200. In the unlikely event that the mount 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 info and daytime telephone number.

  • Page 31: Appendix A. Technical Specifications

    Appendix A. Technical Specifications Mount Hybrid Equatorial Mount (HEM) RA gear system StrainWave 17 DEC gear system Backlash-free worm/belt system RA reduction ratio Payload w/o CW* 29.7 lbs (13.5kg) 7.49lbs (3.4kg) w/o dovetail saddle Mount weight 8.15lbs (3.7kg) with dovetail saddle Payload/Mount weight 3.65 Payload with CW...
  • Page 32 * Payload calculated with payload center of gravity to the RA rotation axis is 200mm. Or an OTA size of ~220mm. Figure 22Distance between HEM RA axis and base of dovetail saddle...

  • Page 33: Appendix B. Go2Nova

    ® Appendix B. Go2Nova 8409 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 Hipparcors Catalog Comets Asteroids...
  • Page 34 Alignment Position of Pole Star One Star Alignment Two Star Alignment Three Star Alignment Solar System Align Polar Interate Align View Model Error Clear Alignment Data Settings Set Time and Site Set Beep Set Display Set Maximum Slew Rate Set Guiding Rate Set Parking Position Horizon Position 1 Zenith Position 1...
  • Page 35 PEC Options PEC Playback Record PEC PEC Data Integrity Park Telescope Edit User Objects User Defined Comet Add a New Comet Browse Comets Delete a Comet Clear All Comets Other Objects Add a New Object Browse Objects Delete an Object Clear All Objects Firmware Information Zero Position...

  • Page 36: Appendix C. Gear Switch Meshing Adjustment

    Appendix C. Gear Switch Meshing Adjustment One may adjust a HEM27 DEC gear meshing, although it may not be necessary in most of the cases. If you experienced DEC motor stall occasionally, or there is a small free play between the worm and gear, follow this instruction to adjust the gear meshing.
  • Page 37 3. To Adjust DEC Gear Disengage DEC gear switch. Rotate DEC saddle to exposure the small hole (3mm in diameter) that is blocked by the dovetail saddle. Another larger hole (5mm) is located on the side of the DEC gear housing.
  • Page 38 Adjust again if needed, but no more than ¼ turn in total. If you feel there is free play between the worm and gear, you may tighten the meshing adjustment plunger to see if it can be eliminated. If not, contact iOptron for service. NEVER...

  • Page 39: Appendix D. Firmware Upgrade

    Appendix D. Firmware Upgrade The firmware in the 8409 hand controller and motor control boards can be upgraded by the customer. Please check iOptron’s website, www.iOptron.com, under the product page or Support Directory.

  • Page 40: Appendix E. Computer Control An Hem27 Mount

    Appendix E. Computer Control an HEM27 Mount The HEM27 mount can be controlled by a SmartPhone, a Tablet or a computer. It is supported by two types of computer connections:  Connect to a computer via USB port on hand controller. The mount can be controlled via ASCOM protocol (Windows OS), or directly by some software, such as Sky Safari (Mac OS) ...

  • Page 41: Appendix F. Go2Nova Star List

    ® Appendix F. Go2Nova Star List Named Deep Sky Object ID No. OBJECT ID No. OBJECT Andromeda Galaxy Hind's Variable Nebula Barnards Galaxy Hubble's Variable Nebula Beehive Cluster Integral Sign Galaxy Blackeye Galaxy Jewel Box Cluster Blinking Planetary Nebula Keyhole Nebula Blue Flash Nebula Lagoon Nebula Blue Planetary...
  • Page 42 Messier Catalog This table is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article List of Messier objects...
  • Page 43 Named Star 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 44 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 45 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 46 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 47 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 48 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 49 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 50: 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.

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