Markus
Postmaster
Reged: 12/26/04
Posts: 5395
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Yea, I got the bins balanced today and no matter where I pointed them, they stayed.  Don't forget, this is my FIRST TIME building a P-Mount, so I'm bound to make mistakes. I added a map holder today, moved the binoculars on the L-Bracket towards the mount for more stability and I have to add some magic sliders on the bottom of the mount as well. Here's everything with the map holder and binoculars moved now. I also need a better handle to slew the binocs and one of THESE !!! .
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25X100 Skymasters
15X70 Skymasters
Home built Parallelogram Mount
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mark22c
sage
Reged: 08/12/07
Posts: 343
Loc: cornwall UK
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dont you just love it when a project finaly gets to the finishing touches, i like the map board. you've done a really good job with the mount mark
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opticron "imagic" BGA SE 8x42 roof's
10x42 roof's
meade/bresser (lidl) 10x50 porro's
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Markus
Postmaster
Reged: 12/26/04
Posts: 5395
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Thanks for the kind words Mark. Yes I do love it when my projects get done, if it werent for the fine people here including yourself, right here on CN, I'd be lost. I did tons of reading and asking lots of questions and it got me to where I am at right now with the mount. All I really had to go by was a load of pics and a few plans, so I am happy so far with the outcome. The map board turns 360° on that bolt and washer you see in the middle of it to orient yourself with the sky above. This mapboard was used on my previous 8" and 12" reflectors as well.
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25X100 Skymasters
15X70 Skymasters
Home built Parallelogram Mount
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Gordon Rayner
professor emeritus
Reged: 03/24/07
Posts: 506
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Since your az bearing is a Dobsonian, you can adjust its friction via a central screw, changes materials, and all the other Dobsonian tricks that are in Berry-Kriege and many other sources. Would it be desirable, in your mount, to increase the friction there so that the C-bracket wrist bearing has lower friction than the central az bearing? Perhaps it is already so. Otherwise, the wrist bearing is not fully functional
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Markus
Postmaster
Reged: 12/26/04
Posts: 5395
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Actually I have increased the friction a tad on the central bearing. As for the C-Bracket, it is not too loose because the bins will "swing" when I move the P-mount part. There is enough "tightness" to it so that when I find the desired place I need to leave the binoculars at, it stays put.
So far things are working out well with the mount and the binoculars. I transport the mount from the shed and back with a dolly.
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25X100 Skymasters
15X70 Skymasters
Home built Parallelogram Mount
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Gordon Rayner
professor emeritus
Reged: 03/24/07
Posts: 506
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Have you considered/ are you intending to/ what are your views on: adding another bearing on the L-arm , so that the binocular can swivel in its own plane? That has been said to be useful for reclined observing.
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Markus
Postmaster
Reged: 12/26/04
Posts: 5395
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How do you mean swivel in it's own plane? If you mean swivel up or down, It already does this perfectly now. 
This is how I was viewing the comet recently.
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25X100 Skymasters
15X70 Skymasters
Home built Parallelogram Mount
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Gordon Rayner
professor emeritus
Reged: 03/24/07
Posts: 506
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A bearing on the lower portion of the L-arm whose axis is parallel to the vertical part of the L-arm. That allows the binoc to rotate around an axis which is perpendicular to the hinge of the binocular and which is also at right angles to the underside of the binocular.
This is mentioned in the Simmons writings in the binocular mounts subsection of this forum ( ABMM), and has been called the fifth degree of freedom by Universal Astronomics.
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12581
Loc: Cumberland, R I , USA42N71.4W
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Gordon is referring to this.
5th and 6th degree of motion of a parallelogram
the 5th motion
rather than attach the binocular center post to a rigid locknut, in this mount the binocular centerpost would attacch to the plate. here you see my deluxe L bracket attached to the plate. You can see the plate has a circular teflon disk under it that allows me to swivel my binoculars in that extra plane of movement.
the 6th motion
in this pick you see I've set op the mount with my L bracket to screw into the front of binoculars. So this is not set up for binoculars with a center post mount. but in this case I get the 6th degree of motion, like a plane tilting its wings from side-to-side.
This photo shows UAs older4 style head. It has been improved for even greater range a balance since this was made.
the ultimate in balance adjusability
These mount heads are shown in my binocular mounts article published several years ago and available in the CN Reports Mounts section.
edz
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Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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Markus
Postmaster
Reged: 12/26/04
Posts: 5395
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I'm fully aware that this can be done, but I am happy with the way things are at the moment. I don't want to add any more motions at the expense of any instability.
When I want, I can turn the binocs up, down, left and right and pull the p-mount down or up and go around 360° as well. This suits me just fine at the moment, and thanks for the tip anyways.
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25X100 Skymasters
15X70 Skymasters
Home built Parallelogram Mount
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