dob barn door style tracking *edit Poncet Platform

[2stroke]

Heya guys I've being looking at a diy tracker for a dob and came across this http://en.wikipedia.org/wiki/Barn_door_tracker in the wiki. Has anyone here attempted making one? and does anyone have and great links to diy guides ect?

Sorry guys i had it wrong and its the Poncet Platform i'am after info on.

[stephenb]

Jay, this project was on my list for last weekend but I became side-tracked with other things.

I'm hoping in the next month to build a barn-door tracker to mount on a tripod for my DSLR - so not quite Dob capabilities.

I've been doing a fair bit of reading lately. Here are some links I came across, so they may be of assistance to you also:

http://www.davetrott.com/DoubleArmBarnDoor.html
http://education.jlab.org/tracker/index.html
http://www.tucsonastronomy.org/barndoor.htm

I will probably go with the double-arm design and copy the dimensions directly from David Trott's page (why re-invent the wheel).

Regards,
Stephen

[Poita]

http://www.iceinspace.com.au/forum/showthread.php?t=31143

[2stroke]

looks like i should be going for a EQ Platform

http://www.budgetastronomer.ca/index.php?page=eq-platform-pt-ii

since i want to put a dob on it lol.

heres another one

http://homepage.ntlworld.com/molyned/the_equatorial_platform.htm

[GraemeT]

Jay, have a look in the equipment discussions forum for a thread called Equatorial Platform for Dobs in Oz?
There is a lot of information there on EQ platforms.

[2stroke]

Cheers Graemet, I just got a copy of Amateur Telescope Making - S.F.Tonkin (Springer 1999) and can't wait to get started. I've being doing a ton of info collecting vai google and have got my hands on the excel cacuations file. Will search for the thread and gather more info in prep for the project :) I'll document for others which my have a go at it once i get materails and plans in place.

[GraemeT]

Jay, That excel spreadsheet can be quite confusing, I found an easier way was to draw the elevation of the design full size and scale off the drawing.
You don't say where you are, so I'm not sure what latitude we're talking about. I've sent you a PM with some ideas.
Graeme

[Poita]

Possibly not relevant, but the people who made this mount might be worth an email!
http://www.schursastrophotography.com/barndoor1.html