Meade 127eq collimation problem

[Rishabh]

That's with focuser half way.

Do I remove the collimator as well?

[Pixies]

Nope - keep the cap on.

That looks great. Now for a pic with the paper inside the tube removed (careful not to touch the mirror)

[Rishabh]

Ahhh I removed the paper..I got too excited xD

1. With focuser removed (no papers)

2. Through the collimation cap(no papers)

3. Without the collimation cap(no papers)

[Pixies]

It's 2 we are interested in. You need to keep using the colination cap.

The next step is to fine-tune the tilt of the secondary, so that the image of the primary mirror (the bright white circle) in the secondary is whole and centered.

It looks like you need to tilt the secondary slightly away from the focuser, bringing the image of the primary mirror 'left' a bit in your second picture.

The plan is to get the image of the primary concentric with the secondary and the focuser. You should be able to see all 3 of the clips holding the primary mirror.

 

[Rishabh]

Okay, so do I turn the middle screw? Or the other 3 screws?

[Pixies]

1 minute ago, Rishabh said:

Okay, so do I turn the middle screw? Or the other 3 screws?

Sorry - the 3 outer screws. Just as you were doing before - now we're fine-tuning. You might have to make smaller and smaller adjustments to centre the primary image.

[Rishabh]

I think it looks better now.

[Pixies]

Yep - just try and centre it with the focuser tube a bit more.

You want to make sure you can see the whole of the outside circumference of the primary (and the 3 clips should look equal). Sometime you have to fine-tune the rotation of the secondary slightly, too.

Take your time, this is the really fiddly bit.

[Rishabh]

This is really frustrating..I messed up I had to do the previous steps again..ahh I can't get it to look any better than this.

[Rishabh]

[Rishabh]

Finally got it all fixed 😍😍 the clarity of the image is wayyy better than before. Thank you so much!!

1.post collimation

2.pre collimation

Edited August 12, 2020 by Rishabh

[RT65CB-SWL]

Well done!