Hello All !
I wasnt sure if this belonged to the Beginners forum ( this is my first time to collimate a newt), but decided on this forum, since it is an old 100mm Vixen Super Halley newt. Earlier on, i took out the primary mirror for a much needed cleaning.
I put a webcam in the focuser. So initially, a portion of the secondary mirror was not even visible. I tried the three little alignment screws behind the mirror, but it didnt hardly do anything to move the mirror-cell unit.
So i decided to fiddle withe the three external screws (in the pics), that lengthen or shorten each spider vane. I loosened two of them, then shortened the other. This did help to move the secondary mirror and make a portion of the secondary holder visible as well, but still way off center ! It seems no amount of further fiddling with the external screws can move the secondary to the center of the focuser tub.
I'm not sure fiddling with the three external screws was the correct approach ? In fact you can see in the pics how loose two of the external screws are.... What do you guys think i'm doing wrong ? Thank you,