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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
EGIS motor
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<blockquote data-quote="dreambox1959" data-source="post: 1160489" data-attributes="member: 314801"><p><h2></h2><p></p><p></p><p>I had the opportunity to buy a 140 cm prime focus, I made an adaptation to mount it on the EGIS engine.</p><p></p><p>[ATTACH=full]155337[/ATTACH]</p><p>[ATTACH=full]155338[/ATTACH]</p><p>[ATTACH=full]155339[/ATTACH]</p><p>The particularity of this AZ-EL motor is that the number of pulses is proportional to the displacement (100 pulses in AZ - 400 pulses in EL). I can therefore calculate with great precision the position of all the sats. Initialization is tricky but you only have to do it once on the installation. I chose to have the AZ index = 9000 (like 90°) due south, and the EL index = 18000 at this point (maximum elevation).</p><p>To obtain these values precisely, the two counters must be initialized to a precise value when searching for the origins. These values are defined by one or two tests:</p><p>1-after having performed the AZ and EL origin searches.</p><p>2-we choose a SAT almost due south (9°E for me) we start the positioning.</p><p>3-of course we will not obtain a good result on the first try.</p><p>4-we adjust AZ and EL manually to have maximum reception.</p><p>5-we calculate the difference between the index obtained and the pre-calculated one, this difference will be applied to the offset value in dial8b6. </p><p>6-we redo step 1 and step 2 should be perfect.</p></blockquote><p></p>
[QUOTE="dreambox1959, post: 1160489, member: 314801"] [HEADING=1][/HEADING] I had the opportunity to buy a 140 cm prime focus, I made an adaptation to mount it on the EGIS engine. [ATTACH type="full" width="399px" alt="vue1.jpg"]155337[/ATTACH] [ATTACH type="full" width="405px" alt="vue2.jpg"]155338[/ATTACH] [ATTACH type="full" width="407px" alt="vue3.jpg"]155339[/ATTACH] The particularity of this AZ-EL motor is that the number of pulses is proportional to the displacement (100 pulses in AZ - 400 pulses in EL). I can therefore calculate with great precision the position of all the sats. Initialization is tricky but you only have to do it once on the installation. I chose to have the AZ index = 9000 (like 90°) due south, and the EL index = 18000 at this point (maximum elevation). To obtain these values precisely, the two counters must be initialized to a precise value when searching for the origins. These values are defined by one or two tests: 1-after having performed the AZ and EL origin searches. 2-we choose a SAT almost due south (9°E for me) we start the positioning. 3-of course we will not obtain a good result on the first try. 4-we adjust AZ and EL manually to have maximum reception. 5-we calculate the difference between the index obtained and the pre-calculated one, this difference will be applied to the offset value in dial8b6. 6-we redo step 1 and step 2 should be perfect. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
EGIS motor
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