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Degree Circles

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#951 NickAtNite

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Posted 24 June 2012 - 11:21 PM

close up of the cirlce

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#952 NickAtNite

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Posted 24 June 2012 - 11:22 PM

close up of the angle locator

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#953 csrlice12

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Posted 04 July 2012 - 04:28 PM

I am getting ready to mount a degree circle on my XT10 base (inclineometer on the tube). Will I mount it at Top Dead Center as 0*, or will it need to be offset to account for longitude/latitude?

#954 beatlejuice

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Posted 04 July 2012 - 04:38 PM

It matters only for convenience. I put the 0 on the west side of the base as the scope is pointing towards the north. Then when I initialize by aiming at polaris, the pointer is in a convenient location for reading AZ when the mount is rotated throughout the night. How did you arrange your pointer for the XT10?

Eric

#955 Gastrol

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Posted 09 July 2012 - 11:16 AM

Here's my new degree setting circle for the 12" Lightbridge.
I took a slightly different approach and drew the degree markings directly on the ground board.
I made the pointer out of 1/8" thick aluminum bar stock and is adjustable over 20 degrees either way from the center of the cutout.
Thanks for looking!

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#956 Herschel400

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Posted 27 August 2012 - 09:16 AM

hello- does anyone know if the LED function on this unit functions properly when temperatures get into the teens?

thanks

#957 73gitane

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Posted 11 September 2012 - 11:53 AM

After a long hiatus from observing with my 14" Dob I have recently come back to discover Cloudynights and manual setting circles. I'm a casual amateur so the convenience of this approach immediately pulled at me. I just purchased the Wixey digital angle and already have an iPad for the calculation. I need to pick an app and am thinking Safari.

My main question is what to do about azimuth. It seems Rob's software is the way to go for generating these things. But while I was at the store buying the digital angle gauge I saw their digital protractors. Has anyone adapted one of these to a scope? It would be pretty slick but what's needed is a remote readout does anyone make something more readily adaptable?

#958 csa/montana

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Posted 11 September 2012 - 12:03 PM

Welcome to Cloudy Nights! Glad to have you join us on the forums!

I saw their digital protractors. Has anyone adapted one of these to a scope? It would be pretty slick but what's needed is a remote readout does anyone make something more readily adaptable?



That's a great question, looking forward to the input from members that perhaps, have adapted this to their Degree Circle scope.

#959 Gastrol

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Posted 11 September 2012 - 07:31 PM

But while I was at the store buying the digital angle gauge I saw their digital protractors. Has anyone adapted one of these to a scope? It would be pretty slick but what's needed is a remote readout does anyone make something more readily adaptable?


I looked at digital protractors also and also wondered how to relocated the display. But the problem was the ones I saw only read up to 180°. Do they make protractors that can track a full circle?

#960 73gitane

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Posted 12 September 2012 - 12:26 AM

Good point, I went to the Wixey site and confirmed the range is +/-180. That would tell me there is at least a physical stop preventing a full 360 but I did not open a package to confirm. I got a chance to read this whole thread(well at least scanned:^) and saw that MtGoat commented on a digital protractor on page 30. He was checking on possible US distributors. He must have hit a wall cause I didn't see any follow up.

Well the printed azimuth seems to work just fine so I'll probably go that route. I just think it would be cool to have a digital readout for both axis.

#961 csa/montana

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Posted 12 September 2012 - 08:51 AM

I just think it would be cool to have a digital readout for both axis.



Indeed it would! Perhaps some member might find a 360 protractor!

#962 PhaedrusUpshaw

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Posted 09 October 2012 - 08:10 PM

WOW thanks for the pdf, and all the great advice concerning degree circles!
CN rocks and YOU guys ROCK!

#963 Gastrol

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Posted 29 November 2012 - 12:48 PM

Here's my new hardwood ply base for my Lightbridge which I just finished building. I used 3M spray adhesive to glue the setting circle to the ground board, then topcoated with spray clearcoat.
The pointer is mounted at the center bolt with a huge range of adjustability.

The adjustable leveling feet make leveling the base a snap instead of getting down on your hands and knees with shims.

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#964 csa/montana

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Posted 29 November 2012 - 12:55 PM

Very nice, indeed! :bow: :bow:

#965 Gastrol

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Posted 29 November 2012 - 01:21 PM

Thanks Carol! I love the large numbers on this circle.

#966 Rob E

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Posted 29 November 2012 - 05:34 PM

I just think it would be cool to have a digital readout for both axis.



Indeed it would! Perhaps some member might find a 360 protractor!



Found this item at the Learning Center (Teacher Supply store)

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#967 astronz59

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Posted 12 January 2013 - 03:55 AM

As a general comment fellow CNers, this company's products are Veeeery impressive!

http://www.oregonruleco.com/dials.htm :refractor::ubetcha: :waytogo:

#968 RobFriedman

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Posted 13 January 2013 - 06:04 PM

I've read a lot of this thread and others concerning DSC's and The Halo, and the SkEye program. I do have a few questions though.

when you use alt/Az setting circles and the number are generated by a program (ie: stellarium) I know that one of the numbers keep changing. How does the numbers help if you set the readout on the side of the scope?? is North always designated 0? on the Halo 90 is at north and 0 is at west. So I am confused at that.

Also with the virtual SkEye DSC does the base need to be level? it seems if that is all you need.. then the upcoming leveling legs and the SkEye program is all any Dob owner needs. I used RA and DEC on my Astroscan when I made a pipe equatorial and using charts let me find various items. someone said that good charts also help with Alt/Az settings.. I've not figured out how since all charts I know are in ra/dec. So alt/az settings require some computer/smartphone of some form to work (is that so??)

hopefully i didnt stir the pot too much

#969 howard929

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Posted 15 January 2013 - 09:24 AM

on the Halo 90 is at north and 0 is at west. So I am confused at that.


It's done that way because most times the focuser is on the left side and so is the pointer. This way, you just need to look straight down rather then around from the EP view to see the setting.

Relative to the OTA and the observer, the pointer is always at the same place, it's the numbers that change as the rocker box rotates.

#970 Joshin

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Posted 21 February 2013 - 12:02 AM

Just popping in to say thanks to Carol and everyone else for all this great info! I put a temporary az circle on the base of a Skyquest my young son has on loan from the astronomy club to try it out, using an analog inclinometer I already had for alt. He's pretty good at star hopping on his smaller scope but was having trouble steering this larger one. We tried out the circles with SkyEye on my phone and it worked great, he could steer much easier concentrating on the circles and gauge as opposed to the red dot finder!

Since this isn't our scope, I went cheap and printed a circle on six sheets of paper, then did the old poor man's packing tape lamination. Attached it to the top board with a few adhesive velcro pads so we could rotate it to the pointer, which is a brass paper brad taped to the side. Final cost, zero dollars since we had everything lying around. This way we can also remove it all before we return the scope to the club in a month or two. I may add a more permanent version to his Starblast now that I've seen the system in action, though!

#971 tag1260

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Posted 28 February 2013 - 09:29 AM

Anyone have a pattern for a 25" degree circle or will Staples re-size it for me? I'm not too computer savvy and with not being able to actually see what I have when finished I'm not sure what I do would be right.
Thanks

#972 csa/montana

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Posted 28 February 2013 - 09:47 AM

Jenny; very happy you tried the Degree Circles out, and enjoyed them! Thanks for posting!

#973 csa/montana

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Posted 28 February 2013 - 09:51 AM

I'm sure Staples can resize it for you; just take the PDF in for one closest to the size you need. Let us know how it goes!

#974 Tom Andrews

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Posted 28 February 2013 - 01:51 PM

Staples can resize to any diameter you need and it's only $6.00 for oversized (anything larger than 8.5x11 paper) then $6.00 for lamination.

#975 beatlejuice

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Posted 28 February 2013 - 04:28 PM

Staples can resize to any diameter you need and it's only $6.00 for oversized (anything larger than 8.5x11 paper) then $6.00 for lamination.



Wish I had that Staples store where I live. $45 was the quote. Used the UPS store for $40. These things seem to be much cheaper in U.S.A. than in Canada.

Eric






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