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Degree Circles

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#1076 Gastrol

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Posted 17 September 2013 - 11:28 AM

Donnie's method allows him to place the pointer anywhere where it's easy to view. The most obvious place would be at the rear. A small block of wood with a fine finishing nail can be used for the pointer, for instance. This pointer will 'revolve' around the stationary degree circle as you turn the scope.
This method is no different from attaching the degree circle to the ground board and making a cutout on the upper board.

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#1077 schang

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Posted 17 September 2013 - 12:03 PM

In your drawing, the bottom of the scope is a lot of higher than it is, at least on my scope, which blocks part of the circle at various alt angles.

#1078 Gastrol

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Posted 17 September 2013 - 12:13 PM

In your drawing, the bottom of the scope is a lot of higher than it is, at least on my scope, which blocks part of the circle at various alt angles.


That was a quick drawing I drew up as I was making my post. I realize it is not to scale and the bottom of the scope should be much lower than depicted in the drawing.
In any event, if Donnie places the pointer at the rear of the base (which I would imagine he would)I don't think he'll have any problem viewing the degree circle even with the scope pointed at zenith. The pointer will always remain in that position, regardless.
Of course, it helps to make the degree circle as large as possible, so in this case the pointer will be placed closer to the outer edge of the base for even easier viewing.

#1079 donnie3

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Posted 17 September 2013 - 01:23 PM

gastrol, thanks for the drawing. I never thought of a small block of wood with a nail hammered into it as a pointer. you people are really knowledgeable, I guess that's why these forums are like a "astronomy gold mine". donnie

#1080 donnie3

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Posted 18 September 2013 - 07:29 PM

got my setting circles all ready on the 10" dob now all I need is a moon less clear night and that can take a while as you well know. donnie

#1081 Locoman

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Posted 18 September 2013 - 08:24 PM

got my setting circles all ready on the 10" dob now all I need is a moon less clear night and that can take a while as you well know. donnie


I've been following your quest with your project and am happy you have succeeded! How about some pics of your completed degree circles because I might try to copy! :lol:

#1082 donnie3

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Posted 18 September 2013 - 09:49 PM

will post some photos tomorrow. donnie

#1083 donnie3

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Posted 19 September 2013 - 04:03 PM

locoman,here is some photos I took on my covered patio. It was raining so could not go out side.

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#1084 donnie3

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Posted 19 September 2013 - 04:07 PM

locoman, I could not post another photo on this one so I will create a original post and call it " setting circle finished product"

#1085 cool arrow

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Posted 28 October 2013 - 03:22 PM

What should be the proper orientation of a degree circle markings should I use, CCW or CW on top of the box board? Carol, in your attached photo, it appears that you have it both ways. Thanks.

shien


If you mount the degree circles on the bottom fixed base, then the numbers should increase clockwise. If you mount them on the top board, then the numbers are counter-clockwise, and the pointer would be attached to the bottom base.


Finally found this reply as I had forgotten what the answer was. I was reading this thread Saturday night with much interest. I just bought an AD10 and I cannot wait to put it together and learn how to use it. I've come across lots of great ideas and the pics are fantastic. Glad I found you guys and gals!

#1086 cool arrow

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Posted 30 October 2013 - 01:47 PM

Any advantages/disadvantages on the location of the setting circle whether top/bottom base plate of dob?

#1087 csa/montana

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Posted 30 October 2013 - 01:50 PM

Putting them on the top base, eliminates having to cut out a section of the base to see the pointer area on the degree circles, if mounted on the bottom base.

#1088 cool arrow

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Posted 10 November 2013 - 04:40 PM

I took Gordon's 24" original (for 12" scopes), and scaled it to 22" for 10" scopes. While I was at it, I went ahead and added intermediate numbers, every 5 degrees.

Please note this one is clockwise-only, so wouldn't work attached to the TOP of the base--it should be attached to the BOTTOM part.

I printed it today, and it looks perfect for the Zhumell 10" scope. The PDF file itself is actually 23" x 23" (because of a slim margin around the circle). When they print, just make sure they print it at 100% size, and don't do a "shrink to page size" (took two printings for my local OfficeMAX to get it right).

I'll post pics when I get it installed. Thanks for the fabulous ideas, everyone!


Thanks BradC for your version of the 22" circle. It worked out perfect! I took the file to my local Staples and had them print/laminate it. I wound up paying $7.89 for it. I will post pics of my progress.

#1089 DarkSkysRFun

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Posted 25 December 2013 - 07:09 PM

can someone print out a circle for a 12in dob base? and i will pay them for it? i dont have a printer and i soooo not good at this stuff. lol
this is the type i like to have. i will cut a piece out of the side of the 2nd plate. (| < if this gives idea..
any help would be awsome. i would waste more paper then its worth to print for me..
http://i276.photobuc...stuff/IMG_14...

#1090 SDTopensied

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Posted 25 December 2013 - 10:48 PM

PM Sent.

#1091 DarkSkysRFun

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Posted 26 December 2013 - 08:40 PM

got to thank sdt for stepping up.. awsome deal.. thank you very much ..

#1092 DarkSkysRFun

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Posted 19 January 2014 - 10:21 AM

ok i went to the setting circle site. but i can not print out for a 33 inch radis circle.
says i have to be a gold memeber. all i can get is one page . that isnt good.
any place i can goto to print one out . iam looking to go 11 inchs * pi = around 33 inchs.. doesnt have to be purfect.
ive wasted a small forest already tryin to get this printed lol

#1093 donnie3

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Posted 22 January 2014 - 06:44 PM

what do you people use for coordinates. pocket pc, tablet. laptop. I would like to use a pocket pc but not sure where to get one and the software? I am not up on these tablets and pocket pc ( I guess the pocket pc`s are out dated) donnie

#1094 beatlejuice

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Posted 22 January 2014 - 07:19 PM

I use a Nexus 7 tablet with skysafari plus. It's a very popular combination. As far as I know you can get a Nexus 7 with 16GB or 32GB of storage space. Although I seldom use the tablet for anything but skysafari when at home, I got the 32GB version just in case of future needs. You can actually do most of the things that you would normally do on a home pc. in a very compact package.

Eric

#1095 donnie3

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Posted 22 January 2014 - 08:19 PM

beatlejuice, thank you very much for that info, I will look the tablet up and probably order one. thanks again. donnie3

#1096 donnie3

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Posted 22 January 2014 - 09:04 PM

just ordered the nexus7 tablet from walmart, the local store didn't have them in stock. donnie

#1097 Tom Andrews

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Posted 02 February 2014 - 10:28 PM

Donnie,

I use a very old (in computer years) HP iPaq pocket pc with Pocket Stars. It's a very basic program with only Messier and Caldwell objects. There are other more expensive programs that offer more data.

#1098 Noisykids

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Posted 01 April 2014 - 11:41 AM

i've got my circle printed, laminated and installed, a magnetic bar with an allen wrench for a pointer, a digital torpedo level, and i installed leveling pads using threaded rod, nuts, lock washers, lock nuts, and hockey pucks. i can level the base to .5 degree on my slanted living room floor, but the threaded rods could be a little longer. is .5 degree going to be close enough? i have no problem getting longer rods. i'm going to level the base, put the ota back on, and then use the inclinometer to get that perfectly vertical before i figure out a fixture to hold the digital level.

#1099 stargazer424

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Posted 07 May 2014 - 02:16 PM

FYI: I just posted my degree circle design to instructables.com:

http://www.instructa...nian-Telescope/

#1100 Dennis_S253

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Posted 07 May 2014 - 06:58 PM

That's cool






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