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<blockquote data-quote="moonbase" data-source="post: 990801" data-attributes="member: 178786">John,I have not yet attached the servo motor to the Zinwell, I am still testing out the rotational range of the APC/Servo. My findings so far using a reference mark on the servo wheel are:1. I need the H ADJ full counter-clockwise and the V ADJ around 2/3 clockwise to get a 90 degree separation when I flick the Invert/Normal switch.2. I have more than 90 degree rotation with the flick switch in the Invert position.3. I have less than 90 degree rotation with the invert switch in the Normal position.4. The over/under 90 degree rotation from 2. and 3. above is about equal.The rotation is a little bit jerky at times and it twitches about a bit, its not a smooth even rotation all of the time. Generally, the reference mark on the servo end up at the correct location but is sometimes quirky on route to that point. Smooth slow rotation of the Skew button lessens the twitchiness. I might try a different PSU just to see if that smooths things out a bit.I will see if I can rig up a test dish on an Az-El fixed mount to have a look at it under operational conditions. Could you please confirm that if I align the dish on 0.8W or due south then the barrel side steps are vertical and the Zinwell has the probes at the 10 to 2 position? Is there a satellite that springs to mind that has linear C band polarity with signals capable of being received by a 1.5m dish within 45 degrees East or West of due south?Thx</blockquote>

[QUOTE="moonbase, post: 990801, member: 178786"] John, I have not yet attached the servo motor to the Zinwell, I am still testing out the rotational range of the APC/Servo. My findings so far using a reference mark on the servo wheel are: 1. I need the H ADJ full counter-clockwise and the V ADJ around 2/3 clockwise to get a 90 degree separation when I flick the Invert/Normal switch. 2. I have more than 90 degree rotation with the flick switch in the Invert position. 3. I have less than 90 degree rotation with the invert switch in the Normal position. 4. The over/under 90 degree rotation from 2. and 3. above is about equal. The rotation is a little bit jerky at times and it twitches about a bit, its not a smooth even rotation all of the time. Generally, the reference mark on the servo end up at the correct location but is sometimes quirky on route to that point. Smooth slow rotation of the Skew button lessens the twitchiness. I might try a different PSU just to see if that smooths things out a bit. I will see if I can rig up a test dish on an Az-El fixed mount to have a look at it under operational conditions. Could you please confirm that if I align the dish on 0.8W or due south then the barrel side steps are vertical and the Zinwell has the probes at the 10 to 2 position? Is there a satellite that springs to mind that has linear C band polarity with signals capable of being received by a 1.5m dish within 45 degrees East or West of due south? Thx [/QUOTE]

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