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I have a hard time believing that there is a 43 minute periodic error

On Wed, Aug 4, 2021 at 08:15 AM, <pcboreland@...> wrote: > > On Wed, Aug 4, 2021 at 02:27 AM, Michael Ben-Yehuda wrote: > >> Use of axial needle roller bearings for the RA and DEC axis shafts *

Jim, As you know this is a bearing problem. Try this arrangement with just the one spring washer. Also I fou

I think as a group we have hit upon the loose fit of the shaft in some but not necessarily all cases is perhaps a foundational problem that it is creating a fore-aft force on the ring gear. If this

Michael's clutch discs are material similar to those used in Celestron Nexstar GT, 5/8 and 6/8 models for the last two decades. In the Nexstars they are designed to slip to prevent damage to the drive

Henk, I do not believe that this will help you for the reason that the tightening of the clutch creates a variable *fore-aft force* on the ring gear due to the the axis shaft being off center. This

Michael, I've said a lot about have to minimizes periodic errors from? the gearboxes and the worm assembly in the past month, and how to and improve Dec guiding performance through using smaller step

I don't see how one could preload the RA bearings with all the weight on it.? Can you be more specific and point out what could reasonably be done while keeping the system simple?? Preloading these

On Wed, Aug 4, 2021 at 04:26 AM, Michael Ben-Yehuda wrote: > > Hi Henk > I'll try and address your questions > >> Don't the "touch points" as per Peter's drawing, depend on how the scope >> is

Looking for one Losmandy High Torque motor. This is for a Titan mount but I've been told that they are the same motor as the G11. Also looking for either a Gemini 1 or 2 controller at a reasonable

Over the past few weeks while following the discussions here in the user group and tearing down and servicing my recently acquired G-11 I'm learning that there are some fundamental design issues that

There is a serial number at the bottom of the RA axis. The company must have a way of deciphering that into the mfg date. I think the first 2 digits after the initials HGM indicate the year of

Hi Henk I'll try and address your questions The touch points don't change by balancing the scope. The total mass of the DEC axis, telescope and counterweight system is supported by the RA shaft and

I may be able to call in to get the date of manufacture of my G11 but it has a black ring gear and is a gem-1 with the last version of the hardware. Standard un-tucked motors. I'll confirm the worm

I suspect that you've got things too tight so there is binding going on. i suggest you loosen the connections at the coupler, the gear reduction mounts, housing and the bearing blocks so there is some

All great ideas. Actually, my thinking is that most of the slop in the RA shaft is taken up when the thrust bearings are loaded as the clutch is tightened, at least i

I think my takeaway from these studies is: The factory changed designs and materials during the years of production. It may change again at any time. Peter on his older G11 system and me looking at a

So the G11 axis has a radial bearing surface for the ring gear mechanism after all?? Well, never mind what I said, then.

Jim can you share your guidelogs or PE analysis data files? -- Brian Brian

Hi gang, I want to correct something. That is, whether the ring gear has its own cylindrical needle bearing or not. It turns out that the G11 has one and the GM8 does not. The removal of the