Quote:Can't wait to see this in Tucson in a few weeks.
Quote:I just want to know that my scope, and the Halo itself, won't be subject to any unfortunate failures years from now.
Quote:Even for EXTREMELY active observers, the Dob base will only spend a small fraction of its life sitting in the HALO.
One 'scope at a time... "Onward! Ever forward, never straight!"
Ron NS11GPS Pronto
16" dob Vixen NA140SS
127mm F9 Surplus Shed/Crawmach kit scope
Best of ATM
Quote: Quote:Even for EXTREMELY active observers, the Dob base will only spend a small fraction of its life sitting in the HALO. Not so, in my case with my 16" setup in my observatory. the HALO would become a permanent addition to the setup. One other question I might have is, what is the diameter for the feet on the HALO for the 16"? This is important, as I would most assurdedly want the HALO feet resting on my concrete support; rather than on the wood floor around the concrete.
Quote:Hi David,Yes, I guess I sounded a bit like a screaming mimi. Of course, there really isn't any way to predict the future, so it will come down to how well early adopters are doing with it a year or so down the road. Thank you for answering my questions and concerns, and for putting up with my admittedly sophomoric, armchair engineering. The Halo looks to be a very well thought out product, I hope many will take advantage of all that it offers. I wish you well!
Quote:Indeed, I would want it for a permanent setup; as once setup in the observatory; there would be no reason to ever move the scope or remove the HALO.
Quote: Even correct any floor interface problems that would cause vibration for her
Quote:Carol,For a permanent setup you can perhaps get rid of the Halo feet all together and instead use leveling blocks/shims directly underneath the circumference of the Halo for more solid support.This would also prevent potential splaying of the Halo feet over time.But on the other hand if you did that that would be a rather expensive degree circle setup as one attractive feature of the Halo are the leveling feet, which you are also paying for and a nice feature to have every time you set up your scope out in the field.
Quote:Quote:Indeed, I would want it for a permanent setup; as once setup in the observatory; there would be no reason to ever move the scope or remove the HALO.Well then, as Ron mentioned you may be the perfect test case since you would be putting one of the heaviest telescopes on the largest HALO. Once we get a 16" LB base in here so that we can get the HALO dimensioned perfectly for it, I'll get in touch.David GilesOpticsmart.com
Quote:I really don't think the HALO would look very classy up on blocks.
Quote:David, if the I.D. of the Halo is a slip fit for the O.D. of the LB's base, that might add enough additional support to help prevent the Halo from cupping in over the long haul (provided that cupping is even an issue to begin with!). Especially if the outer edge of the LB's groundboard is flat, or has a large diameter radius milled into it. Perhaps that, along with only extending the Halo's feet just enough to keep the LB's feet just off the floor, and tightening down the lock nuts on the threaded rods once the mount has been leveled, might go far towards greatly increasing the Halo's overall rigidity and resistance to any sag that might otherwise develop over the long haul under such a load.
Quote:I really don't think the HALO would look very classy up on blocks.
Quote:Quote:I really don't think the HALO would look very classy up on blocks. I shudder at the thought! Seriously though, if your floor is flat and level, we could simply send you a HALO without feet, and you could remove the rubber feet from the bottom of your Dob's base. Then just set the HALO flat on the floor, get it oriented perfectly north, set the Dob in it and you're good to go.David GilesOpticsmart.com
Quote:Might there be a way she could lock the Halo to the floor so the alignment doesn't drift over time?
Quote:Quote:Might there be a way she could lock the Halo to the floor so the alignment doesn't drift over time?She could absolutely do that if she wanted to. If we send the HALO without feet installed, she could simply drill holes in her concrete floor (with the appropriate drill bit) and install concrete anchors at the positions where the leveling feet would normally be on the HALO. Then use long bolts to run through the HALO's leg-holes and into the anchors. Of course when screwing into the concrete anchors she'd have to be careful not to crank down on them TOO hard (as with any MDF/wood product) so as not to damage the HALO.David GilesOpticsmart.com
Quote:David, I'm very tempted to just plunk down the credit card! However, I have to hold off for the time being, at least until the funds become available. But I'll tell you, I really want to see this for myself. Despite everything I said, I really like the thinking behind it, and hope to get one sooner than later!
Quote:Do the leg holes have tapped metal sleeves that the threaded rods screw into?
Quote:Quote:David, I'm very tempted to just plunk down the credit card! However, I have to hold off for the time being, at least until the funds become available. But I'll tell you, I really want to see this for myself. Despite everything I said, I really like the thinking behind it, and hope to get one sooner than later! Believe me Bob, I understand about funds being unavailable. Quote:Do the leg holes have tapped metal sleeves that the threaded rods screw into?We install threaded metal inserts into both sides of the Extira before installing the leveling feet.David GilesOpticsmart.com
Quote:Thanks! If you were to leave the inserts in Carol's Halo, could they prevent the concrete anchoring screws from damaging the Halo while at the same time providing a bearing surface for the anchors to be torqued against? Or, would it preferable to leave the inserts out, and just torque the screws against a flat washer?
Quote:I seriously doubt that the Halo will shift to a point where you had to make constant re-alignment of the pointer. A thin rubber pad or felt paper underneath should prevent it from shifting with all that weight on top. I can understand locking down the mount for EQ mounts, but for setting circles I don't think it's that critical.
A Dob, several refractors, a few mounts, and assorted eyepieces. I build things like well reasoned arguments...
Please dont get me wrong, I really like this idea, and I'm very excited about this product announcement. I've even shared about this idea on reddit.com/r/astronomy and to some of my colleagues. But I have to be honest, I feel like price on this is a little high.
Quote:Well aznights, if you wanna play you gotta pay and it has been my experience in astronomy as well as in everything else you get what you pay for. The Halo is a simple solution to a complex problem. If you do not have the means or the ability to build your own setting circle with leveling and azimuth aligning capabilities it would seem as if Dave's Halo is one very good solution to the common problem of finding and viewing celestial objects.
Of course that is simply my opinion so please take it for what it might be worth...
Quote:Thanks for your comments Bill! But just for the record, aznights did go ahead and order the HALO. He's paid, so he can play.
Quote:Hmmmmm, self adhesive shims so you can use one base for both, or a peg that the user can tap in (or leave out) depending on the size of base.
Quote:You'd think that something so inconsequential as a rubber bumper would be the last thing you'd change! Then again, maybe their supplier dropped out and they had to go with someone else.
Quote:How thick is the shelf that the edge of the groundboard sits on?
Quote:How tall are the feet on the end of the leveling screws?
Quote:I'm curious about the minimum amount the threaded rods would need to be extended before the feet on my telescope's groundboard start to lift off the floor.
Quote:Thanks, Dave. Especially for taking the time to enclose those photos. Especially for then doing the math for me! You're easing my worried mind. What did you use to seal the machined surfaces on the Halo?