EQHM-17 is a mount equipped with harmonic drives on both axes. Essentially, it is a German equatorial mount (EQ) but can also operate in ALT-AZ mode. 

The device is built as a monoblock with a primarily steel structure, with the RA and DEC axes protruding from a common housing. This design makes the mount more compact and rigid, and eliminates the need for connecting cables between the two axis assemblies. The mount is constructed from powder-coated stainless steel plates in black, creating the main chassis. The mounting brackets for the wedge and dovetail are made of aluminum, while the side panels are made of plastic. It features 17-100 steel harmonic gears. The overall gearing ratio on both axes is 500:1, with the first stage being a 5:1 belt drive and the second stage being a 100:1 harmonic drive. 

In the right ascension axis, an electromagnetic brake is used to prevent the axis from rotating in case of a power interruption (a standard feature). The device is controlled using the OnStepX module, which includes GOTO functions and wireless Wi-Fi connectivity, as well as a wired USB connection. The control module is compatible with ASCOM and INDI drivers, making the mount compatible with “everything” (NINA, Stellarium, SkyPlanetarium, Astroberry, StellarMate, ASIAir, etc.). The OnStepX control module also has the advantage of being based on open-source software, allowing for extensive modification and customization to meet individual needs. The electronic board with the control module uses high-quality TMC2209 stepper motor drivers, ensuring smooth operation of the device and a pleasant sound from the motors.

The device can also be controlled with a Smart Hand Controller type remote with a display (offered as optional equipment). It is standardly equipped with the ability to install a counterweight. 

The mount is recommended for telescopes with a focal length of up to approximately 1000 mm. The guiding quality (RMS) over an entire session averages 0.6 arc seconds, with a periodic error of +/- 25″. This value, of course, depends on various factors, such as seeing conditions, the type of telescope and guiding camera, mechanical stability of the entire setup, wind gusts, etc.

Basic parameters:

– Weight of the mount head: 5.6 kg

– Weight of the DUAL dovetail: 0.9 kg

– Weight of the EQW-72 wedge: 2.2 kg

– Load capacity without counterweight: 13 kg

– Load capacity with counterweight: 20 kg

– Counterweight port: M12x1.75

– Power supply: 12V (maximum current draw 2.5A and up to 4A in impulse mode with the e-m brake)

– Data connection: USB type B

– Power connection: DC 5.5/2.1 mm

– Control: USB via ASCOM/INDI driver

– Control: WIFI through a dedicated IP port

– Web interface (for control and configuration of the device).

– RJ-45 interface for SHC remote (with ST-4 standard output and UART serial port)

The device is available for purchase. For inquiries, please contact us via the application form.

The mount is offered in the following variants and prices:

a. mount head only, without dovetail and wedge – 4500 PLN

b. adapter for installing a wedge and William Optics dovetail – 200 PLN

c. complete mount with dedicated EQW-72 wedge and DUAL dovetail – 5900 PLN

d. Smart Hand Controller with display – 220 PLN

Prices include 23% VAT (invoice provided). Warranty: 24 months.