Quote:
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Originally Posted by antare
elgemcdlf,
- My Declination is 17deg (theory is 23.3) because the FC90U does not have a very good scale (dish)
- Elevation is 43.75 (motor)
You mean I should go :
Declination 18
Elevation : 42.75
I thought it was a NO NO to touch the Elevation ?
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I think the thing is, that if you did it right, it is a "NO NO" to touch it, you only mess with it if it's apparent that it isn't set right.
I know I'm like a broken record on this, but again, when I see a motor "ELEVATION" in the 40s, I ALWAYS suspect that elevation and latitude are being interchanged.
Ie if by chance your motor has a "Latitude" scale instead of an "Elevation" scale, then the 43.75, you entered was really 46.25, which would result in you needing about 2.5 degrees less on your dish elevation. Also, the FC90 dish you have, has an offset angle that is 1.87 degrees more than the other Fortec dishes. That means, that if, as I suspect, the "U" type bracket you got with it is generic for the other fortec dishes, then your dish would be
aiming an additional 1.87 deg high, meaning that you'd need another 1.87 degrees more declination (lower dish elevation), ie a total of 4.37. Ie, we're getting pretty close to that 5 degrees that you said the dish elevation is off.
Anyway, what I would do, was make sure that you entered your "Elevation" on an elevation scale. If you did, then, OK, your scales must be way off for some reason, and you might be best off experimenting as Steve said, but if you entered your Elevation on a Latitude scale, I'd recommend starting over and entering the right elevation.
{ Broken record mode off. :-) } { Wonder if anyone in the current generation knows what broken record means??? }
EDIT: Oh, and one other thing, the 23.3 or 17, is not really the "declination" the declination is 6 degrees. The 23.3 (or I would have suggested 24) is the dish elevation, which is 30-declination, where 30 is the bend angle on the motor shaft, assuming the bend is at the published angle. Ie since the dish can't aime down 6 degrees, they bend the motor shaft 30 deg, so that the dish then raises 24 degrees to get the 6 degrees down. I get dizzy with all these angles.
EDIT #2: THE ABOVE calculations were ALL WRONG. SORRY. I was assuming 43.75 was elevation but actually it was Latitude, so nearly everything I said was wrong. SORRY.