Dobsonian skywatcher

[fiestazetecmk2]

Just getting my ideas down for making my dobsonion alt adjustment set-up on paper.will start work on it asap.watch this space.will have wheel central between 2 stainless rods 1 will be threaded.and 1 plain.set in a block .both ends rose jointed for smooth movement Should be simple really.

[John]

Would this be like a slow motion control for that axis ?

[fiestazetecmk2]

Yup.certainly is.

[furrysocks2]

47 minutes ago, fiestazetecmk2 said:

Just getting my ideas down for making my dobsonion alt adjustment set-up on paper.will start work on it asap.watch this space.will have wheel central between 2 stainless rods 1 will be threaded.and 1 plain.set in a block .both ends rose jointed for smooth movement Should be simple really.

Is this the same arrangement as the commercially available one on which you based your az? Ie having the lengths of plain and threaded rods overlap in length, quick release on the plain for coarse and handwheel on the threaded for fine? Or are you nesting one inside the other?

[fiestazetecmk2]

I won't say the same but similar.?to the commercial one.

[furrysocks2]

OK.

Not that mine is much to go on, but three things about it come to mind (which likely won't plague yours anyway)...

• my adjuster is up near the aperture which I find too high
• I've some play between threaded and tube which makes for a bit of a rattle/deflection when reaching for and tweaking the adjuster
• is your scope already a bit front heavy when you de-tension the alt bearings? I find that without an EP or much weight up top I have to assist the scope in coming down - keep it all smooth, front loaded or both and you're probably fine

Not that you need any help from me - your az looks the business!! Well done.

 

Looking forward to seeing/hearing more.

[fiestazetecmk2]

I will try and make very smooth to operate.my wheel will be central .

[furrysocks2]

6 minutes ago, fiestazetecmk2 said:

I will try and make very smooth to operate.my wheel will be central .

Never a doubt.

[fiestazetecmk2]

The wheel will be in the most comfortable position for me.should be fairly central I thinks.I'm hoping to make the whole thing  removable so it can be put back to how it was originally.

[fiestazetecmk2]

Getting there.here is a picture .but it's by know means finished yet.still got Alot to do.but I'm happy so far.

[fiestazetecmk2]

Well it's finished.I'm happy with it.easy to use.and totally removable.makes a world of difference to the scope.It has cost me £55.to do alt/az.and that's a bargin.just got to do 25 years of road testing now.?

[happy-kat]

Interesting project.

[furrysocks2]

Very cleanly executed, this looks the business. Well done!