Resolution of the XML preset  

Everything you need to motorize your head
no avatar
geraldcor
Member
 
Topic author
Posts: 17
Likes: 0 post
Liked in: 0 post
Joined: Fri Feb 27, 2009 12:20 am
Location: Salt Lake City, UT
Info

Resolution of the XML preset

by geraldcor » Wed Mar 04, 2009 5:59 pm

Hello all,

After ordering the wrong usb to serial cable (adafruit only carries the 3v version - beware) I have to wait a bit to play with my mount, so I have had a lot of time to fiddle with the xml presets. I assume each number corresponds to a degree value like 90 corresponds to 90degrees, is this correct? If so, what is the resolution of these numbers. If I input 90.5, will the head really move 90.5 degrees? What about 90.25? etc. Just wondering what type of resolution is possible from papywizard and the head.

Greg
Canon Rebel XT XTi
EF-S 18-55 IS, EF-S 17-85 IS, EF 50 1.8
Asus EEEpc, OLPC, Arduino (In the works)
Papywizard of course

User avatar
fma38
Moderator
 
Posts: 5850
Likes: 2 posts
Liked in: 2 posts
Joined: Wed Dec 07, 2005 6:21 pm
Location: Grenoble, France
Info

by fma38 » Wed Mar 04, 2009 7:02 pm

Papywizard internal resolution is 0.1°, but the Orion accuracy is about 0.3-0.5°. So, don't bother with 0.05 ;)
Frédéric

no avatar
geraldcor
Member
 
Topic author
Posts: 17
Likes: 0 post
Liked in: 0 post
Joined: Fri Feb 27, 2009 12:20 am
Location: Salt Lake City, UT
Info

by geraldcor » Wed Mar 04, 2009 11:31 pm

Oh that is excellent resolution for my needs. Thanks for the info.
Canon Rebel XT XTi
EF-S 18-55 IS, EF-S 17-85 IS, EF 50 1.8
Asus EEEpc, OLPC, Arduino (In the works)
Papywizard of course

no avatar
mediavets
Moderator
 
Posts: 16415
Likes: 2 posts
Liked in: 130 posts
Joined: Wed Nov 14, 2007 2:12 pm
Location: Isleham, Cambridgeshire, UK.
Info

by mediavets » Thu Mar 05, 2009 12:07 am

geraldcor wrote:Oh that is excellent resolution for my needs. Thanks for the info.

I'm intrigued to know why you would feel the need to set such precise (and/or small) values in a custom prest file.

The main use for custom presets is to shoot spherical panos using relatively short focal length lenses.

In such circumstances that degree of precision isn't necessary with 25-30% overlaps between images.

If shooting hi-res partial panos with long focal lengthg lenses you would normally use Mosaic mode and even then with a max of a 100x50 matrix you are not usually approaching such small intervals between shots on either axis.
Andrew Stephens
Many different Nodal Ninja and Agnos pano heads. Merlin/Panogear mount with Papywizard on Nokia Internet tablets.
Nikon D5100 and D40, Sigma 8mm f3.5 FE, Nikon 10.5mm FE, 35mm, 50mm, 18-55mm, 70-210mm. Promote control.

no avatar
geraldcor
Member
 
Topic author
Posts: 17
Likes: 0 post
Liked in: 0 post
Joined: Fri Feb 27, 2009 12:20 am
Location: Salt Lake City, UT
Info

by geraldcor » Thu Mar 05, 2009 1:01 am

I am using the presets as a way to control the head for my panning time lapse obsession. With .5 level increments (or less) I can have the yaw move quicker than the pitch(or visa versa), thus making more interesting pans rather than a basic 1:1 ratio pan. I am working on a little script where I can enter some values and it will output an appropriate XML file for different panning types.

Greg
Canon Rebel XT XTi
EF-S 18-55 IS, EF-S 17-85 IS, EF 50 1.8
Asus EEEpc, OLPC, Arduino (In the works)
Papywizard of course

no avatar
mediavets
Moderator
 
Posts: 16415
Likes: 2 posts
Liked in: 130 posts
Joined: Wed Nov 14, 2007 2:12 pm
Location: Isleham, Cambridgeshire, UK.
Info

by mediavets » Thu Mar 05, 2009 1:12 am

geraldcor wrote:I am using the presets as a way to control the head for my panning time lapse obsession. With .5 level increments (or less) I can have the yaw move quicker than the pitch(or visa versa), thus making more interesting pans rather than a basic 1:1 ratio pan. I am working on a little script where I can enter some values and it will output an appropriate XML file for different panning types.

Greg

I see. Sounds interesting.

Looking forward to seeing some results.
Andrew Stephens
Many different Nodal Ninja and Agnos pano heads. Merlin/Panogear mount with Papywizard on Nokia Internet tablets.
Nikon D5100 and D40, Sigma 8mm f3.5 FE, Nikon 10.5mm FE, 35mm, 50mm, 18-55mm, 70-210mm. Promote control.

User avatar
fma38
Moderator
 
Posts: 5850
Likes: 2 posts
Liked in: 2 posts
Joined: Wed Dec 07, 2005 6:21 pm
Location: Grenoble, France
Info

by fma38 » Thu Mar 05, 2009 7:33 am

So, it seems you need a variable speed for timelapse... I add this to the todo list, but I don't know if it is possible to manage with the Orion...
Frédéric


Who is online

Users browsing this forum: No registered users and 2 guests

cron