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Webster Telescopes Forum • View topic - C-32 Front cooling fan that rotates for easy collimation
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 Post subject: C-32 Front cooling fan that rotates for easy collimation
 Post Posted: Tue May 25, 2010 11:34 pm 
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Joined: Tue Aug 11, 2009 10:30 pm
Posts: 3
Hello all. I designed a cooling/boundary layer fan setup that rotates out of the way for easy collimation. I designed the fan mounting for my C-32 to allow collimation without having to remove the whole assembly. The fan is mounted on a 5.5 inch ring/baffle made out of delrin plastic. The ring has a 90 mm center hole in it that is appropriate for mounting a 92mm fan. The delrin ring is held in place with . 032" stainless steel tension wires which also provide current for the fan. The fan can be easily rotated out of the way for quick collimation, it does not have to be removed. I included a picture of the fan rotated out of the way for collimation. Fan is interchangeable with a lower output model via RCA plug. Since the fan is mounted over the center of the mirror, the airlow is much more even from the center out in all directions as opposed to crossing boundary layer fans mounted on the inside perimeter of the mirror box. Quite a few people thought it was pretty cool over on the cloudy nights site and I figured it would be useful to post pics here as well.

Joe Wambo


Attachments:
File comment: corner mounting/electric
cornermounting.jpg
cornermounting.jpg [ 106.05 KiB | Viewed 4143 times ]
File comment: delrin ring
delrintop.jpg
delrintop.jpg [ 112.16 KiB | Viewed 4143 times ]
File comment: Fan rotated for collimation
DSCN0422.JPG
DSCN0422.JPG [ 48.09 KiB | Viewed 4143 times ]
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