I have the knobs!

[magician]

Thanks to the excellent photographs,and fabrication text,from Daz,I have now made and fitted three collimation knobs for the Explorer (8"),after replacing one screw at a time, the collimation is the same as was prior to the exercise,it looks like all the "After" pictures in the articles I've read,Now a silly question, How for into the eyepiece does the cheshire go?I assume all the way up the shoulder where the angled polished plate is,

would be grateful if someone would confirm as it seems awfully close to the secondary.

Cheers Frank

2

after

[Albireo380]

Glad it has worked out Frank. Can you repost the pictures? - no sign of them on your original post.

Cheers

Tom

[magician]

Still trying to get the hang of posting pictures,I tried to upload one or two of my moon shots into Iseestars but get a message saying (a) Upload sucessful but then ( wrong type of file,I had saved them on my PC as tif (I read somewhere that would save space) but it appears Iseestars can't accept them,will try again with something else, and then with luck , a picture of the knobs,Even as a newcomer I Really think the Bob's (Or Daz'sKnobs) has to be the way to go.

Cheers Frank

[FLO]

If you intend to post a pic, first save a copy as a Jpeg then attach it to your post by clicking on 'additional options' (bottom-left when posting).

So long as the image is 100kb or less, it will work a treat.

[daz]

Glad to see it worked out OK Frank

[FLO]

How for into the eyepiece does the cheshire go?I assume all the way up the shoulder where the angled polished plate is,

would be grateful if someone would confirm as it seems awfully close to the secondary.

What matters is that you can see the entire mirror.

Look for the three clips that hold the mirror, if you can see those, your there

[The Warthog]

On one of my scopes, I had to move my head slightly to see the mirror clips just over the edge of the secondary. Still got good collimation.

[magician]

Sorry Fella's I don't seem to be able to get these pics to you, probably because I dont know what the hell I'm doing, will continue to play.

Cheers Frank

[Caz]

Hi Frank,

Once you have changed your images to Jpegs, make sure you have adjusted the size to say 600 x 650 pixels (no larger than 800 pixels).

If you are having difficulty with the way Steve suggested, theres another route:

Log into your iseestars account, and click on the image you want to upload to Stargazers. Underneath that image, you will see, 'remote access' if you click on that, two options will appear 'html tag' or 'forum tag'. Highlight and copy either one of these. Then all you have to do is, go to your thread, type your message as normal, then right click, and your image tag should be pasted.

HTH

Caz

[magician]

Thanks Caz, Cant I just Descibe them to you, Ha, Ha, Ha,!!!!

[magician]

Just an experiment

[JohnC]

IT WORKS

[magician]

Have downloaded a programme called Powertoys for windows XP that allows me to resize images,it seems to work , so here are the pictures of the collimating knobs - I Hope-!!!!

[Caz]

At last, we finally get to see your knobs!! :shock: Well how else could I have said it? Good stuff Frank :thumbleft:

Caz

[FLO]

Looks good Frank

[daz]

A neater job than mine

Nice knobs

[magician]

Thanks Daz, The idea was shouting out to be done, but I only followed your lead.

[tony4563]

Where do you get these knobs from? They certainly look easier to adjust the primary than the usual way. Do they do them for any make of Dob or reflector?

[magician]

Hi Tony,

This came about because the Sky watcher is my first Newt, and collimation reared its ugly head, Common sense said there aught to be a better way of adjusing the primary mirror, in the form of knobs of some description, then I found the Bobs knobs site, here was the answer I had thought of ,Daz on this Forum , had already had the same Idea and had made some knobs, I have done the same,You will need some 5m Bolts, or Studding, ( They are 5M on the Skywatcher,you must determine what size yours are) and whatever knobs appeal, ( Don't use knobs with big Mushroom heads, because you will need to get at the locking nuts if your scope has them,)cut the studding to length, Araldite ,or otherwise fit the the knobs, and replace ONE AT A TIME, the original adjusting screws,then Recollimate. Cheers Frank

http://www.bobsknobs.com/