Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> ATM, Optics and DIY Forum

Pages: 1 | 2 | (show all)
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
D=103mm F=1575mm Jaegers F-15 w/tripod & mount new
      #5513945 - 11/11/12 02:47 AM Attachment (94 downloads)

This is really a continuation of another thread I posted a few months ago:

(http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5140754/page/0/view/collapsed/sb/5/o/all/fpart/all/vc/1)

I have since completed the telescope and am now working on the tripod and fork/ring mount, which is much more complicated than the scope ever was. Everything is scratch built without a mill. The fork, ring mount etc, was built from Speedy Metals stock and free handed on a grinder, disk sander, drill press, make shift lathe, files, sandpaper, and of course a caliper to measure thousandths of an inch. The first picture here is of the fork and rings with gears I got out of a printer. The shafts were gotten out of a printer also. They function great. The 312:1 gears can be disengaged to just point and look which is what my son really wanted. I had to talk him into the gears - but only if they were able to be disengaged. He already has a computer "Go-To" mount, so he certainly isn't lacking with higher tech stuff. He wanted it to be simple. no batteries. (Even though I stuck a green laser on the mount)Some of the things like the aluminum connector, white knob were changed to brass. This pic was the fork-ring mount in it's first stages before upgrades and changes.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513949 - 11/11/12 02:54 AM Attachment (50 downloads)

Here it is again with gloss black Lacquer, brass etc...
Also there is a mock up of a star diagonal, brass green laser housing I made, and the beginning of a brass finder scope.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513952 - 11/11/12 03:06 AM Attachment (44 downloads)

By the way, here is the scope, I turned the 4-1/2" diameter x 1/8" wall tube down to .050" wall on a friends lathe and bought the dual speed focuser and collimatable lens cell from crawmach.com. It is shown here without the 10" brass dew shield.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513959 - 11/11/12 03:21 AM Attachment (46 downloads)

Tripod. I don't like retractable legs, besides the legs have hidden 6 inch unscrew able legs inside the bottom of the legs for uneven surfaces. Not to mention the fact that the tripod is a little shorter than the six foot scope (w/dew shield) itself.
The tripod has a 321:1 gearbox that disenguages underneath the round center tray. The center shaft is mounted in 2 precision bearings and has zero play/wobble. This pic is unstained and sealed and doesn't show the gearbox yet.
The center tray does come off (3 Black knobs that unscrew under the round tray)and the legs do fold up even though they don't retract.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513962 - 11/11/12 03:30 AM Attachment (39 downloads)

Brake/tension brass disk. a brake shoe goes against it, therefore it is accurate to less than a half a thousandth o f an inch. The brake shoe material came from a brake shoe off of a full size car! And is very smooth and fluid. It will lock up or just put a little tension with just a turn of a screw.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513964 - 11/11/12 03:35 AM Attachment (36 downloads)

With Green Laser

Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513969 - 11/11/12 03:48 AM Attachment (26 downloads)

Close up

Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513971 - 11/11/12 03:52 AM Attachment (38 downloads)

Yes that is a shell case for a knob!
Works good


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513975 - 11/11/12 04:04 AM Attachment (28 downloads)

Green Laser is not mounted yet. By the way, there is a 2 foot shaft attached to the bottom of the fork which extends up about 22 inches making the total height of the scope pointed straight up about 9'8" which will put the EP just under 4'. None of that down on your knee's stuff. Hey, it's a long scope, that's why the tripod is so tall.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5513977 - 11/11/12 04:09 AM Attachment (40 downloads)

More to come. When the scope is finished it will be in Astronomy Technology Today magazine. I have already written the article and spoken with the editor. -Soon...
More to come
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Sean Cunneen
Let Me Think
*****

Reged: 08/01/07

Loc: Blue Island Illinois
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5514210 - 11/11/12 10:34 AM

Very cool! A fresh take! Beautiful.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5517302 - 11/13/12 05:45 AM Attachment (29 downloads)

Here is the underside of the round center tray. The 312:1 gearbox rotates so that the knob points in any direction. The short stainless steel shaft disengages the gears enabling hand rotation, or "point and look". The gearbox rotates around the lip of a stainless steel pot! There is a 360% ring that fits around the lip which I made out of corian, very tight fit, but it glides when rotating. Very solid, so solid in fact it doesn't need to be locked when it's re-positioned. The gears came out of an old printer except for the worm drive which I got from Surplus Shed. The top side of the tray has a sealed bearing which the extendable shaft (see tripod picture)fits into. The second bearing is mounted at the top of the tripod. The 22" x 1-1/2" part of the 2 piece shaft is inserted from the top of the tripod and the bearing locks into a hole on top and through the bearing in the center tray, or it can be pushed up from the underside into the top bearing and then the center tray tightened. - Take your pick! The veneer came off a piece of de-laminated plywood that had been sitting outside for several years, I wrapped it around a large PVC pipe which encases the rotating assembly. The center tray itself is made from oak plywood with .005" brass veneer (a little thicker than a piece of paper) around the edge. (Over 300 parts on the whole tripod and fork-mount which gave me calluses on top of calluses making them!) More pic's to come including the finished tripod.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5517306 - 11/13/12 05:49 AM Attachment (26 downloads)

Shot of the entire underside with flexible shell casing knob.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount [Re: Z28500]
      #5519613 - 11/14/12 02:35 PM Attachment (28 downloads)

Who says you can't build your own 2" star diagonal?!
Not quite finished yet though.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5520148 - 11/14/12 09:02 PM Attachment (26 downloads)

The laser is a green 5mw bought from Amazon, it makes a nice bright green line to the sky, but not too bright like my 100mw which is why I choose the 5mv for this scope. Right now it is spaced with black elec. tape but I may make 2 short aluminum sleeves for it. If it ever goes bad, all that has to be done is get another laser pen and insert it into the brass holder! The only thing about pen lasers is that the light doesn't shine parallel to the casing so it is important to get it straightened out by shimming inside the brass holder 1st, then align it in the triple screw holders 2nd. In other words, the pen is crooked inside the brass, but the green line shines out parallel to the holder.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5520149 - 11/14/12 09:03 PM Attachment (20 downloads)

Assembled Laser, all hand made, the end pcs. were made with a drimmel, drill press, disk sander, tap, rubbing compound after sanding with 600 sandpaper. The tube - same thing, also I soldered the little round piece that the custom screw goes into which is also soldered. The solder was then sanded and polished which is why it turned out like it did. The long round knob on the end of the screw is made out of 3/16" brass rod!
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5520241 - 11/14/12 10:15 PM Attachment (21 downloads)

Closeup of gears. The worm gear has a spring loaded push-pull Allen screw knob which locks in the engaged or disengaged position. There are 2 more gears that aren't shown. 312:1 ratio.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
Z28500
sage


Reged: 02/27/12

Loc: N. 30.1 W.-95.6 Texas
Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5520247 - 11/14/12 10:20 PM Attachment (22 downloads)

Engaged. The lower knob is spring loaded and is the one that pulls in and out locking the worm gear in both positions.
Z


Post Extras: Print Post   Remind Me!   Notify Moderator  
dan_h
Carpal Tunnel


Reged: 12/10/07

Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: Z28500]
      #5522432 - 11/16/12 08:31 AM

Wow! You have certainly done a lot of work and very nicely. It just goes to show what can be done with simple tools if you have the skills. I particularly like the brass items. They will look great contrasted with the black.

One question. Do you have any concerns that the gears will not hold up to the stress once they are loaded with the OTA?

dan


Post Extras: Print Post   Remind Me!   Notify Moderator  
Kunama
professor emeritus


Reged: 10/22/12

Re: D=103mm F=1575mm Jaegers F-15 w/tripod & mount new [Re: dan_h]
      #5522881 - 11/16/12 01:07 PM

Fantastic work, very much appreciate this type of commitment.
Waiting for more updates ..........................


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
17 registered and 28 anonymous users are browsing this forum.

Moderator:  ausastronomer, richard7, Starman81 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2354

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics