Setting circle 8" Skywatcher dobson Anticlockwise

[daiwelly]

Hi does anyone have a PDF or CAD file file for the above it must be anti clockwise as it is going on the top plate i have a setting circle already but it has both scales on clockwise and anticlock wise and this can cause some confusion at night under red light, this is the setting circle i have at present as you can see their are two scales on it, and now I realise after 12 months it can be confusing.

[Lowjiber]

Here's a PDF that I've used for everything from a small (9" Diameter) to a large (20" Diameter) circle.  Just take it down to the local office store and have them expand/shrink it to the size you need.

HaloSettingCircle-black.pdf

[daiwelly]

Here's a PDF that I've used for everything from a small (9" Diameter) to a large (20" Diameter) circle.  Just take it down to the local office store and have them expand/shrink it to the size you need.

Thats a great setting circle but it is clockwise and no good for the top plate it needs to be anti clockwise thanks anyway

[Lowjiber]

Sorry it won't work for you, David.

I must confess though.  I've build about a dozen azimuth circles on several different scopes and can't even visualize a circle on the top plate.

Clear, Dark Skies

[daiwelly]

Sorry it won't work for you, David.

I must confess though.  I've build about a dozen azimuth circles on several different scopes and can't even visualize a circle on the top plate.

Clear, Dark Skies

It actualy works very well and very easy to set up anyway here is a link to my blog and show how I did it the only problem i have is the setting circle has both scales and the anti clockwise one is not very clear.

http://stargazerslounge.com/blog/1370/entry-1760-sw-200-dobson-eyepieces-my-mods/

[michael8554]

Two suggestions David:

1) White Tippex on the southern hemisphere numbers

2) post a request on the Australian astro forum Iceinspace, someone there must have made their own setting circles.

Michael

[daiwelly]

Problem solved I downloaded a setting circle and then modified to anti clockwise in adobe illustrator should have thought about that before what a donkey I am.

the obivous was staring me in the face. anyway I have included it here

my modified setting circle.pdf

[daiwelly]

For clarity i have made the numerals more bolder, cant wait to get it printed up now

my modified setting circle.pdf

[asset189]

looks good and Im interested to know how you use it?

Ive got a top scale on mine (both directions) and a moveable pointer made from a large foldback style paper clip , this allows me to move the clip and align on any bright star, works a treat.

[daiwelly]

asset189

here is a link to my blog which shows how I use the setting circle

http://stargazerslounge.com/blog/1370/entry-1760-sw-200-dobson-eyepieces-my-mods/

[asset189]

asset189

here is a link to my blog which shows how I use the setting circle

http://stargazerslounge.com/blog/1370/entry-1760-sw-200-dobson-eyepieces-my-mods/

way grander than mine and looks good. Operating principle the saem. My setting circle is o top but my pointer is a very rough modified crocodile clip with a wire pinter soldered onto it. The clip can be placed anywhere on the base so alignment very easy. Got an angle meter which attaches to the tube magnetically for elevation.

[happy-kat]

I used magnetic tape from Halfords (uk) and made a pointer from a metal jam jar lid and a bit of wire. The tape is under the base.