Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
RE: Fitting Encoders To Dobo

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Robert May on August 21, 2000 21:33:28 UTC

The things that are important is that the encoder takeoff pulley or gear be accurately centered on the shaft of the DOB centerline otherwise the belt will be tight at one point and loose at 180 degrees and the position won`t be that accurate. As far as the encoder itself, it can have a different axis by a little bit just so long as when you look at it, there is not differential of motion as you move the scope around. Do some experiments on paper or in your head as to what an extreme of what you are thinking of is going to do provided the motion of the scope is properly moved to the encoder. An offset wheel will make the motion uneven and thus bad.
The other thing that you have to remember is that the encoders don`t like a lot of stress on them as they will quickly wear the bearings out and then you will be buying new encoders when that happens. Let the encoders kind of float a bit so that they can find thier own exact postion that they find to be happy. When you make the connection to the scope, also use a low stress method for the same reason. The belts (if that`s what you are using) don`t need to be tight as the friction of the encoder is quite small. Snugging the belt up will be quite sufficient.

Follow Ups:

Login to Post
Additional Information
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2020 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins