A polar wedge allows an azimuth mount to be used as a parallactic mount. The mount is tilted so that the azimuth axis is parallel to the Earth's axis. This allows the Earth's rotation to be compensated for by continuous rotation around this axis. In the case of Dobson telescopes, this is also referred to as an EQ platform. The entire Dobson telescope is simply placed on this inclined platform. The angle of inclination must match the latitude of the observation site.
The Dobson platforms from TMS-Astro are unique because they offer a variety of additional features and functions that are not available on platforms from other manufacturers.
The platforms are available in two versions: for visual observation (short exposure possible) and a photographic version with additional declination drive that can be controlled via an autoguider!
Please note the "visual" or "photographic" designation in the product name for the desired version.
Please also note the specified geographical latitude range that applies to your observation location. The map on the right will help you make your selection. EQ platforms are optimised for a specific latitude. The manufacturer offers them in 5° intervals. For example, if you want to observe in Austria, select the EQ platform with 45°-50° in the product name.
In visual mode, the upper plate moves to the start position after the control unit is switched on and the tracking routine starts automatically. When the tracking time has elapsed, an acoustic signal sounds and the control unit waits for 12 seconds. If no button is pressed during these 12 seconds, the upper plate returns to the start position and the tracking routine starts again. Otherwise, the platform will not reset itself. In this case, you can start the movement to the start position by pressing and holding the white button (for at least 2 seconds).
In photo mode, the declination axis moves to the reference position after the controller is switched on and returns to the centre position as soon as it reaches it. At the same time, the RA axis begins its routine to move to the home position. When both axes have reached the start position, the tracking routine begins. When the tracking time has elapsed, the sequence is the same as in visual mode.
Pole alignment: The built-in compass and spirit level help to roughly align the platform. When the bubble in the spirit level is in the centre, the platform is aligned with the centre of the segment's working area. The adjustable feet allow you to change the polar angle. To achieve a higher angle, raise the front (pole-facing) feet of the platform or lower the rear (pole-facing) feet.
Now you can place the telescope on the Dobson platform and switch it on using the main switch on the control unit, whereupon the platform will return to its starting position. Tracking will then begin automatically.
