|
Legin try this:
For a start put away the laser collimator until this is sorted. It can introduce errors that can confuse the issue and it doesn't help initial alignment of the secondary.
Step 1: Align the secondary under the focuser.
Place a piece of paper between the secondary and the primary to block the view so that all you can see is the secondary. Also place a piece of paper against the tube wall opposite the focuser to make the secondary easier to see.
Adjust position of sight tube in focuser in or out so the entire secondary can be seen. Check that the outside edge of the secondary is circular and concentric with end of the sight tube.
If not you will have to adjust the secondary's position using any or all of the adjustment screws available.
Step 2 : Align secondary to primary.
Remove the first piece of paper from step 1. Adjust tilt/rotation of secondary so that entire primary mirror can be seen. Again the sight tubes position in the focuser may need to be racked in or out. Look for the primarys mirror mount clips as a guide. You should be able to see all 3 (or 4) of them reflected in the secondary. Once you have this, align the sight tube crosshairs over the centre donut on the primary. Dont sweat if you cant get that last millimetre but get it close. The crosshairs may look fuzzy and hard to see. It can help to back your eye off from the peephole while keeping the crosshair centred.
Step 2: Align primary donut to the cheshire illuminated ring. This is the easy bit.
|