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I just did some calculation on delta between leveled and full swing platform. It does not work. Because the delta is not a consistant number. The object closer to Polaris for example will have a different delta from an object away from Polaris.

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In regard to your inclinometer, I assume when you mount the inclinometer on the tube - it has to be vertical in order to get an accurate reading of the altitude. But . . . when you have a platform swings all the way . . . the inclinometer is not necessarily vertical anymore.
So even using an adjustable mounting, there should be a way to compensate vertical axis.

The RA and Dec method is even more complicated because dobsonian has only two UN-adjustable plane (vertical and horizontal) With RA and Dec, you need to have a 3rd axis in order to make the 2 planes coincide with the true North (Polaris) . . . like the the equatorial mount. . . . Unless I am wrong . . .

Have fun tinkering . . . I am going to sleep on it again . . .

Ridwan

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Regarding the inclinometer, the analog unit would be susceptible to mechanical error- the indicator would rub on the housing. I am not sure about my electronic unit, I haven't tried it in anything but a normal attitude.

Have to give that a try.

Interesting to think about. Thanks

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Rod Nabholz
Home Built Astronomy Projects
Wild Bird Photography

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