Help on my XX14i Truss Shaking at Zenith
Need some help on the XX14i I have. Took it out to shake it down last night and I found that the scope did terrific until I got it up to zenith. At zenith last night M13 looked like it was being viewed during an earthquake. The scope really shakes back at forth at zenith so that impacts the viewing. Any ideas what would cause this and how to correct it? I'm thinking that the mirror cell may be lose (but the scope performs wonderfully until you are about 1 degree from zenith and then it freaks out) or the springs used on the primary aren't strong enough to support the weight of the scope at zenith and I may need to order stronger springs. Sorry about this, user error I'm sure and being new to a truss design I thought I would ask and hopefully solve some an issue with some help. I still don't have the intelliscope thing down and I think my azimuth encoder disc which came slightly dented in the middle hole where it goes through the bolt is the cause. I'm going to call Orion and ask for a replacement.
Yes, Jay, I agree. You definitely should get any defect fixed. Also, I'm wondering if there was a breeze. Were all the parts bolted together securely? Best, Joe --- On Mon, 7/5/10, Jay Eads <jayleads@gmail.com> wrote: From: Jay Eads <jayleads@gmail.com> Subject: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith To: utah-astronomy@mailman.xmission.com Date: Monday, July 5, 2010, 8:57 AM Need some help on the XX14i I have. Took it out to shake it down last night and I found that the scope did terrific until I got it up to zenith. At zenith last night M13 looked like it was being viewed during an earthquake. The scope really shakes back at forth at zenith so that impacts the viewing. Any ideas what would cause this and how to correct it? I'm thinking that the mirror cell may be lose (but the scope performs wonderfully until you are about 1 degree from zenith and then it freaks out) or the springs used on the primary aren't strong enough to support the weight of the scope at zenith and I may need to order stronger springs. Sorry about this, user error I'm sure and being new to a truss design I thought I would ask and hopefully solve some an issue with some help. I still don't have the intelliscope thing down and I think my azimuth encoder disc which came slightly dented in the middle hole where it goes through the bolt is the cause. I'm going to call Orion and ask for a replacement. _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
There was a slight breeze some of the time. Not to put words in Jays mouth, but initially there were a couple slightly loose trusses, but tightening them didn't seem to help. It seemed to get into a resonance that wouldn't stop. The shroud wasn't on as we didn't think about it until after collimating it and it wouldn't fit easily over the focuser. Craig -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Joe Bauman Sent: Monday, July 05, 2010 11:47 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith Yes, Jay, I agree. You definitely should get any defect fixed. Also, I'm wondering if there was a breeze. Were all the parts bolted together securely? Best, Joe --- On Mon, 7/5/10, Jay Eads <jayleads@gmail.com> wrote: From: Jay Eads <jayleads@gmail.com> Subject: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith To: utah-astronomy@mailman.xmission.com Date: Monday, July 5, 2010, 8:57 AM Need some help on the XX14i I have. Took it out to shake it down last night and I found that the scope did terrific until I got it up to zenith. At zenith last night M13 looked like it was being viewed during an earthquake. The scope really shakes back at forth at zenith so that impacts the viewing. Any ideas what would cause this and how to correct it? I'm thinking that the mirror cell may be lose (but the scope performs wonderfully until you are about 1 degree from zenith and then it freaks out) or the springs used on the primary aren't strong enough to support the weight of the scope at zenith and I may need to order stronger springs. Sorry about this, user error I'm sure and being new to a truss design I thought I would ask and hopefully solve some an issue with some help. I still don't have the intelliscope thing down and I think my azimuth encoder disc which came slightly dented in the middle hole where it goes through the bolt is the cause. I'm going to call Orion and ask for a replacement. _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
Does the shroud help keep the trusses firmly place? --- On Mon, 7/5/10, Craig Smith <cs2560@gmail.com> wrote: From: Craig Smith <cs2560@gmail.com> Subject: Re: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith To: "'Utah Astronomy'" <utah-astronomy@mailman.xmission.com> Date: Monday, July 5, 2010, 12:15 PM There was a slight breeze some of the time. Not to put words in Jays mouth, but initially there were a couple slightly loose trusses, but tightening them didn't seem to help. It seemed to get into a resonance that wouldn't stop. The shroud wasn't on as we didn't think about it until after collimating it and it wouldn't fit easily over the focuser. Craig -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Joe Bauman Sent: Monday, July 05, 2010 11:47 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith Yes, Jay, I agree. You definitely should get any defect fixed. Also, I'm wondering if there was a breeze. Were all the parts bolted together securely? Best, Joe --- On Mon, 7/5/10, Jay Eads <jayleads@gmail.com> wrote: From: Jay Eads <jayleads@gmail.com> Subject: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith To: utah-astronomy@mailman.xmission.com Date: Monday, July 5, 2010, 8:57 AM Need some help on the XX14i I have. Took it out to shake it down last night and I found that the scope did terrific until I got it up to zenith. At zenith last night M13 looked like it was being viewed during an earthquake. The scope really shakes back at forth at zenith so that impacts the viewing. Any ideas what would cause this and how to correct it? I'm thinking that the mirror cell may be lose (but the scope performs wonderfully until you are about 1 degree from zenith and then it freaks out) or the springs used on the primary aren't strong enough to support the weight of the scope at zenith and I may need to order stronger springs. Sorry about this, user error I'm sure and being new to a truss design I thought I would ask and hopefully solve some an issue with some help. I still don't have the intelliscope thing down and I think my azimuth encoder disc which came slightly dented in the middle hole where it goes through the bolt is the cause. I'm going to call Orion and ask for a replacement. _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
The scope might have not been seated on the ground in a stable configuration. Make sure all three contact points are firmly in contact with solid ground. On 7/5/10, Craig Smith <cs2560@gmail.com> wrote:
There was a slight breeze some of the time. Not to put words in Jays mouth, but initially there were a couple slightly loose trusses, but tightening them didn't seem to help. It seemed to get into a resonance that wouldn't stop. The shroud wasn't on as we didn't think about it until after collimating it and it wouldn't fit easily over the focuser.
Craig
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Joe Bauman Sent: Monday, July 05, 2010 11:47 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith
Yes, Jay, I agree. You definitely should get any defect fixed. Also, I'm wondering if there was a breeze. Were all the parts bolted together securely? Best, Joe
--- On Mon, 7/5/10, Jay Eads <jayleads@gmail.com> wrote:
From: Jay Eads <jayleads@gmail.com> Subject: [Utah-astronomy] Help on my XX14i Truss Shaking at Zenith To: utah-astronomy@mailman.xmission.com Date: Monday, July 5, 2010, 8:57 AM
Need some help on the XX14i I have. Took it out to shake it down last night and I found that the scope did terrific until I got it up to zenith. At zenith last night M13 looked like it was being viewed during an earthquake. The scope really shakes back at forth at zenith so that impacts the viewing. Any ideas what would cause this and how to correct it?
I'm thinking that the mirror cell may be lose (but the scope performs wonderfully until you are about 1 degree from zenith and then it freaks out) or the springs used on the primary aren't strong enough to support the weight of the scope at zenith and I may need to order stronger springs. Sorry about this, user error I'm sure and being new to a truss design I thought I would ask and hopefully solve some an issue with some help.
I still don't have the intelliscope thing down and I think my azimuth encoder disc which came slightly dented in the middle hole where it goes through the bolt is the cause. I'm going to call Orion and ask for a replacement. _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
participants (4)
-
Chuck Hards -
Craig Smith -
Jay Eads -
Joe Bauman