SatSig topic:

What will be after 6.2m motorised satellite dish experiencing heavy storm?

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Jan 15^th, 2024 at 7:01am

In July of 2020, one of Russian clients ordered 1 set of 6.2m motorised satellite dish antenna from us. We finished production and shipped out to Russia in August. In November, client finished installation and feedback some photos. Everything is prefect then.

You know the weather in Russia is worse than other places cause of long and cold winter season, and which will experience heavy snow or storm even in the first half of year. In previous week, client emailed us that they experienced heavy storm but the antenna with a little damage but still working after that.

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As one of Chinese professional manufacturer of antennas, Antesky takes weather factor including wind resistance, rain and snow load into consideration when designing and producing in advance. In general, our 6.2m motorised satellite dish operation wind resistance is 72km/h and Gusting to 97km/h; and survival wind is 200km/h. Normally if the wind is over than 97km/h, client need to stow the antenna in the Zenith position. We believe this information does help them to protect antenna. Later they told us that our antenna is strong when facing strong wind.

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We are glad to share with you the below photos before and after storm.

Copyright © www.antesky.com
6.2m antenna is one of hot sales product in Antesky, which we had installed in America 2016, in Gunaya 2019 and in Russia 2020 respectively. And another 1 set is still on the way delivery to Africa. Definitely, we are looking forward to updating soon once client completes installation.

Finally, if you are in searching of this 6.2m motorised satellite dish or you have some questions about the antennas using in high-wind area, please contact sales@antesky.com without hesitation.

Jan 15^th, 2024 at 5:58pm

I suspect that during varying storm winds that the signal level varied due to slight movements in the bearings and in the screw jack actuators.

In elevation backlash is zero in light winds due to the weight of the antenna pulling all one way(*). In azimuth backlash in light winds is possible due to no force being applied one way or the other.

In strong winds the variations can push the antenna up and down and from side to side. It is difficult to stop any movement when the design uses short lever arm length which cause very high forces across the bearings and along the screw jacks.
I think the customer has pointed the antenna accurately and then added 4 supplementary stabiliser struts attached to pairs of rib tips either way from the bottom centre. These struts need slackening, releasing and retightening if the antenna is re-pointed at different satellite. While the antenna is stabilised with additional struts tracking must be powered off.

(*) except when the elevation angle is such that the antenna is balanced and about to fall over forwards or backwards.

Hope this helps. Well done to the customer for improvisation! The timer

Jan 17^th, 2024 at 5:08pm

If I remember correctly, the azimuth actuator works on an arc depending on the position of the azimuth motor anchor point.
Looking at the photo it is hard to tell but if the whole mount is oriented north-south, then the arc might be between 170 and 270 deg. Just a guess noting that the azimuth screw tube is sticking out in south east direction.
If you find yourself operating at the extreme end of an arc range then the backlash may be greater than if the actuator is in the middle of its range.
What does the specification say about the number and position of the alternative azimuth motor anchor points?