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Motor drive for C band LNB circular polarity
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<blockquote data-quote="Spiff" data-source="post: 1011901" data-attributes="member: 404998"><p>Hallo Trust1,</p><p></p><p>We did signal quality tests before and after adding anything that could cause the signal to be degraded.</p><p></p><p>The large drive wheel made little or no difference, neither did the metal shaft.</p><p></p><p>The dish was set up before hand for absolute maximum quality level which was 81.</p><p></p><p>Today I tested it again with all the added parts for the polarity changing and it was 81.</p><p></p><p>It has surprised me that it made no difference, but there it is : )</p><p></p><p>As to controlling the settings, I shall use as low a voltage as I can on the motor which is already a low revolution device.</p><p></p><p>It will be fed with twin wire to the remote operating position from a polarity change switch and an on off toggle switch.</p><p></p><p>Maximum quality being obtained by watching the level on the quality bar.</p><p></p><p>I can then use a known signal to set it to right or left should I wish to do a blind scan.</p><p></p><p>The servo motors that you mentioned sound interesting, it may be that I will try that later.</p><p></p><p>The hope is that the motor when it arrives is slow enough, as when setting the device by hand a very small movement ether way made quite a difference to the quality level.</p><p></p><p>Also there were higher levels with the slab further in the LNB, so I will make sure that its position on the shaft is at optimum.</p><p></p><p>I may fit another pulley opposite the motor on the scalar rings so that there is no pull on the shaft towards the motor by the drive band.</p><p></p><p>This could cause the shaft bearing in the LNB cap which is thin to tilt and cause the slab to hit the inside of the LNB.</p><p></p><p>The motor is coming from China, we paid extra but it will still be a week or so.</p><p></p><p>God Bless Spiff</p></blockquote><p></p>
[QUOTE="Spiff, post: 1011901, member: 404998"] Hallo Trust1, We did signal quality tests before and after adding anything that could cause the signal to be degraded. The large drive wheel made little or no difference, neither did the metal shaft. The dish was set up before hand for absolute maximum quality level which was 81. Today I tested it again with all the added parts for the polarity changing and it was 81. It has surprised me that it made no difference, but there it is : ) As to controlling the settings, I shall use as low a voltage as I can on the motor which is already a low revolution device. It will be fed with twin wire to the remote operating position from a polarity change switch and an on off toggle switch. Maximum quality being obtained by watching the level on the quality bar. I can then use a known signal to set it to right or left should I wish to do a blind scan. The servo motors that you mentioned sound interesting, it may be that I will try that later. The hope is that the motor when it arrives is slow enough, as when setting the device by hand a very small movement ether way made quite a difference to the quality level. Also there were higher levels with the slab further in the LNB, so I will make sure that its position on the shaft is at optimum. I may fit another pulley opposite the motor on the scalar rings so that there is no pull on the shaft towards the motor by the drive band. This could cause the shaft bearing in the LNB cap which is thin to tilt and cause the slab to hit the inside of the LNB. The motor is coming from China, we paid extra but it will still be a week or so. God Bless Spiff [/QUOTE]
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Motor drive for C band LNB circular polarity
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