About this product
Model: iop_hem27
Part Number: H272
New Hybrid Harmonic Drive Mount from iOptron
This portable, high-payload tiny titan will deliver an astronomy experience like never before. A mount head weighing in at 3.7kg / 8.15 lbs with a payload capability of 13.5kg / 29.74 lbs, without needing a cumbersome counterweight or shaft.
Utilising state-of-the-art harmonic drive technology for the RA movement in tandem with backlash-free DEC worm/belt drive design, the HEM27s deliver unparalleled weight to payload efficiency.
Its black anodised all-metal CNC machined body is a sturdy, rugged platform that will perform at the highest level for many years.
Unique features such as an electronic friction break and power-down memory enable the mount safely stop and resume a GoTo slew or continue tracking even after an abrupt power loss (no need to realign and restart).
The HEM27EC features a high-precision RA axis encoder that delivers incredible tracking accuracy, enough that many will choose to image “sans” guiding.
IMPORTANT:
Please read the Quick Setup Guide (QSG) BEFORE setting up and operating the mount! Please also read the full online Instruction Manual.
IOptron HEM mounts have a cable management system. To avoid cable damage, a mechanical stopper is implemented in RA to prevent the mount from rotating over 360 degrees.
The strain wave gear system provides high torque and strain, so damage to the stopper might happen if:
1. ‘Site’ and ‘Time’ are incorrectly set
2. The mount starts from the incorrect Zero Position. Please perform 'MENU=>Zero Position=>Searching Zero Position’ to establish Zero Position
3. Manually slew the mount past meridian 20 degrees.
If you have any questions, please contact us or iOptron for support.
iOptron's HEM27 FAQ page.
FEATURES
- Advanced harmonic drive technology
- The payload capacity is 13.5 kg (29.7 lbs) with a mount weight of 3.7 kg (8.15 lbs)
- CNC machined and cast metal body
- Unique friction brake to safely stop movement during a planned or unplanned power interruption
- 360-second gear period
- Permanent periodic error correction (PPEC)
- Go2Nova® hand controller with ~212,000 object database
- Cable management system, no hanging exterior cables to moving parts
- Dual saddle (Vixen and Losmandy-D styles)
- Built-in zero position search and locator
- Power down position and location memory
- Integrated ST-4 auto-guiding port
- Built-in Wi-Fi (via hand controller)
- USB port for firmware upgrade and computer control
- Soft carrying case
- Two-year warranty
Go2Nova Hand Controller 8409
- 212,000 object database & star identification
- Large LCD screen with four lines and 21-character with backlit LED buttons
- User-friendly interface
- 9-speed setting for motor slew speed
- Serial port for firmware upgrade and mount computer control
What's in the box
- Telescope mount
- Hand controller (HC) – Go2Nova® 8409
- Controller cable
- AC adapter – 100‐240V
- Soft carry case
Specifications
| Mount | Hybrid Equatorial Mount |
| RA Gear system | StrainWave 17 (RA)/worm gear (DEC) |
| DEC Gear system | Backlash-free worm/belt system |
| RA reduction ratio | 120 |
| Payload w/o CW * | 29.14 lbs (13.5kg) |
| Mount weight | 7.49lbs (3.4kg) w/o dovetail saddle, 8.15 ls (3.7kg) with dovetail saddle |
| Payload/Mount weight | 3.65 |
| Period | 360 second |
| Drive motor | Stepper motor |
| Structure Material | All metal, CNC machined |
| Exterior finish | Anodised black |
| PEC | Yes, Permanent PEC |
| Latitude adjustment range | 15º ~ 65º |
| Azimuth adjustment range | ± 5º |
| Polar Scope | No |
| Level indicator | Level bubble |
| Control system | GOTONOVA/Commander |
| Hand Controller | Go2Nova® 8409 with ~212,000 objects database |
| Tracking | Automatic |
| Maximum slew speed | 6º/sec |
| Power consumption | 0.5A(Tracking), 1A(GOTO) |
| Power Requirement | 12V DC, 5A |
| AC adapter | 100V ~ 240V (included, indoor use only) |
| Power off brake | Electronic friction brake |
| Power-down memory | Yes |
| Wi-Fi | Built-in |
| Communication port | Yes (Wi-Fi and USB) |
| Autoguide port | Yes (ST-4 compatible) |
| Firmware upgrade | Yes |
| Tripod | Optional |
| Operation temperature | -20ºC ~ 50ºC (hand controller -10ºC ~ 40ºC) |
| Warranty | Two year limited |
* 200mm, with payload center of gravity to the RA rotation axis. Or an OTA size of ~220mm.
Downloads / Manuals
Manual:
Quick Start Guide
Instruction Manual
Firmware and Software:
Download Latest Firmware
iOptron Telescope ASCOM Driver:
Install ASCOM Driver and Commander
Customer reviews
| Average Rating (1 Review): | |
29 January 2024 | Francis
I'm going to start with a negative, that being the task of changing from vixen to losmandy saddle forms a task I decided will only happen once as I've now changed both set-ups to losmandy saddle plates. I played with the mount only to start with just to get things working with my asiair plus and my laptop running NINA. Then still indoors with scopes mounted (RASA 8 or 80mm f6 refractor setups). Balancing dec was easy enough, both setups didn't require counterweights and being tripod based I wanted to make sure I had no issues slewing without a CW especially with the RASA mounted. All checked out so next clear night (full moon!) it was first drive night for the mount. I used the asiair plus for PA which proved easy enough in both Az & Alt directions. Adjustments were made with both axles slightly tightened and left as is to avoid any changes that might change settings. I tried a mix of guiding exposures from 2 seconds down to half a second with a second giving me good guiding and lots of guide stars (9x 50 guide scope asi120mm camera).
I've given 4 stars because of the saddle and having to buy an additional losmandy plate to avoid fiddling with small wiring and screws to swap kit around otherwise it's really a solidly built mount, very very quiet and guides well.
If you only have a single setup then it's ideal, more than one then change to the same saddles.
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