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I've had a heck of a time understanding where I might be getting RA - and only RA - spikes from. My setup is a Celestron 9.25"Edge HD with an OAG, sitting on a Losmandy GM811 mount, using Gemini II, N.I.N.A and PHD2 to control everything. Calibration looks good (See the PHD2 log) and tracking is generally very good - nearly always within 1" ...except for occasional non-periodic spikes in RA which randomly occur a few times an hour, always in the same direction. All gearing and bearings have been thoroughly cleaned but I suspect something in the RA train is binding up, then suddenly releasing. I keep the clutches relatively loose. No real differences between East and West guiding. Alternatively, maybe it's the power supply (but then, why only RA)? Or a corrupted signal from PHD2? One of these days I'll try swapping motors but because tracking is generally really good I don't want to fool around with the drive train until I absolutely have to. Regardless, I should be grateful - I typically get at least 9 good images out of every 10 - but those spikes just bug me because I can't determine root cause. Have any of you dealt with this in the past, and if so, I'll take as many recommendations as I can get. Paul

Hello all, My L6 G11 has been a dream for the past 11 months now. However, two nights ago, it was not so nice. I had these dec spikes that appeared to be periodic but I am not sure, and overall the guiding was messy. I did a worm adjustment just in case it was wrong, regreased the worm gear, and then back for round 2 last night. Last night was not much better. Usually the mount guides at around .4-.5 ish but last night it was more around .9. Here is an attached image of a section of my guide log. Does anyone know what I can do to improve my guiding? Maybe I need to replace the wavy washer? It's been two years. Maybe a clutch pad replacement? Worm bearings? Also to note, my polar alignment error was 1.5 arc minutes which is fine. I have been at 2.7 and still guided at .59 throughout the night. I will also attach a good guide log from a couple months ago. Good log: Bad log: Thank you so much for your help! Clear skies, Michael -- Gear: Mount: Losmandy G11G Gemini 2 Level 6, SkyWatcher Star Adventurer Gti w/ pier extension, Star Adventurer Pro Optics: Stellarvue SVX102T-R Raptor, Redcat 51 V2, Askar FMA180 w/ focal reducer, Canon EOS 18-135mm Zoom Lens Camera: QHY 268M, ZWOASI 533 MC Pro, Canon EOS 80D (Stock) Guiding: ZWO 290mm Mini + Askar FMA 180 w/ focal reducer, ZWOASI 120mm, ZWO 30mm f/4 Accessories: Optec Alnitak Flip Flat, TSE Prowler 3rd Gen Night Vision, QHY CFW, Stellarvue Diagonal - 2", Meade HD-60 Eyepieces. Focuser: EAF w/RC51 kit, PLL Sesto Senso 2 Brain: PrimaLuceLab Eagle 4S(spec'd out with upgrades), PrimaLuceLab Eagle 4, Asiair Plus(32 GB), Asiair Mini Filters: Antila V-Pro LRGB, Antila 4.5nm Edge Sii and Oiii, Antila 7nm Ha, Optolong L-Ultimate, Optolong L-eNhance, Astromania Luminance Filter, Thousand Oaks Optical Full Aperture (Solarlite Polymer) Solar Filter

Just began working out how to use a new G11. Using an ASIair plus, carrying a 380mm f/3.8 telescope. ZWO cameras - 533MC and the 174MM mini for guiding. Polar alignment verified with iPolar and the air app. Less than half a minute both axis. I was unable to achieve decent guiding after a few hours of trying things. Seeing is reasonable. Guiding with 2 second exposures. It will track well for 10 or 15 seconds, then it wanders into 5 to 10" errors. Doesn't seem to be one axis or the other. Fairly certain of the mount being level and everything tight and balanced. Looking for ideas on things that could be causing this. I have no experience using a Losmandy mount prior to this one. I have good experience with several other mounts from Vixen, Software Bisque and ZWO. Next time I will trying using Nina and PHD2 and see how that goes. Using the air is a convenience but not necessary. Might also try TheSky Professional if I can create a model for this mount from that. I am hopeful I am just missing something. I have not done any model input nor PEC training. Looks like TheSky supports these mounts so maybe a TPoint model will help.

Thanks for the help re the router. I can access the server with my desktop, Netbook and Chromebook. As I said on that first post - I was getting a little ahead of myself. As far as I can see - my time - location and GPS coordinates are all fine. Although last week when I did a dummy run I could not see the moon, the scope did seem to goto the right place. Today, I tested it and the goto was way out - pointing way under the horizon. I am sure that UTC was correct - I think that is automatic. I am in the northern hemisphere so have -117 as the longitude Pacific time so I'm -7. Sorry to take up more bandwidth. It was hot today and within a few mins the Gemini was close on being too hot to handle and I brought it in. Any suggestion please. Dave Although I logged into the server yesterday - I did not knowingly make any changes.

Hello All, I've older version of G11G with OPWB (Prior to Spring loaded worm gear). I'm getting a sudden jump in PHD2 autoguiding calibration process when after moving by 25px in the west and as soon as it tries to move back towards east direction. This can be seen in my below uploaded video sharp at 31 seconds: https://youtu.be/2SW32UhU6v4 This calibration is closer to Meridian and East pointing West. But same observation is during calibration closer to Meridian and West pointing to East. I just re-greased the spur gears and the worm-wormwheel assembly with Liqui Moly in both RA & Dec axes. I then adjusted backlash to be minimum both in RA & Dec axes. Regardless of minimal backlash adjustment or not this behavior keeps repeating. I fairly balanced my Celestron C9.25 OTA with 1384 focal length after 0.63 reducer. I'm doing off axis guiding with this same focal length and have configured PHD2 as well with it. I made sure that the Dec motors are tightly screwed in. Anybody has any ideas on why this is happening then that would be really helpful. I can provide more details if anybody asks and can try suggestions the next night I get to imaging. Thanks, Nikul

Hi folks I'm getting a little ahead of myself here. A member of the local club has kindly been round and helped set up my new mount. We didn't realize until yesterday that my "netbook", an Asus did not have an ethernet socket. So it's wifi only. Luckily, he had his laptop and worked on inputting stuff to Gemini. It wasn't until just before he left, I remembered I had a mini router - one that came with an Asiair (from Cloudy Nights) and not used yet. A GL-AR750S-EXT. I have managed to attach to the Gemini, log into this and thought that all I had to do was input the IP address (into my browser) now on the Gemini, obtained from the HC and I would be fine. It doesn't work. I am looking at videos etc - but talk of gateways and the like do confuse me. So, I am not experienced in such matters. Perhaps if I right click on my wifi icon in Network on my Win 11 netbook - copy the info from Gemini into that (IP address, gateway etc), it will work? Anyway - I'm sure my new mate from the club will assist but might take a week to get out here again and I need to research what I can. So, any advice or links appreciated. I have seen something from Losmandy but not quite what I need, I think. Obliged. ps I took the Gemini and router outside and attached to the scope. It's only on a deck a few yards away, powered up but that part works fine.

Hello, I have a Losmandy G11 Gemini 1 v4 (updated) mount bought back in 2001. It’s the version with the RJ45 motor sockets. Until now I have not attempted to use the autoguiding RJ12 port but would like to get it working and invest in a cooled camera. According to the Gemini manual, the Common pin 2 has +5V on it rather than 0V of the ST-4 standard, but in both cases to activate the drive you connect one of the direction pins to the Common pin. I have verified that the +5V is present on Common. I currently have the mount indoors on a table. For a completely different reason I have made a simple hand controller consisting of four directional switches that connect the Common to each of the direction pins and I thought I could use this to test the autoguiding port. I also have a RJ12 tester box with 6 LEDS that light if +5V is detected. Using a ‘Y’ splitter in the autoguiding port, I have plugged in both. The Common pin LED lights and pressing each of the other switches lights the appropriate LED. In the Setup menu, I have set sidereal tracking rate, photo mode (repeated with All Speeds) as the manual says and also a guiding speed of x0.8. If I hold down one of the DEC switches for a long time, I see no indication on the motor/worm that it is turning. Also, the manual says that if I hold down the opposite direction switch at the same time, there should be an ‘Autoguiding error’ on the display (deluxe hand controller). I don’t see this message – the display is just blank. This makes me think the autoguiding port is not working. So here are some questions that I hope someone can help with: 1) Can I test the autoguiding port in this way? Does it only respond to short correction pulses rather than a continuous signal? 2) Am I missing something in the menu settings? Assuming I get it working at some stage there are a couple of other questions: 3) Do all cameras with a ST-4 port have opto-isolator outputs with open collectors? (I realise that I will need some kind of inverter to connect to the Gemini). 4) Some cameras only have a USB. Do cables exist that are USB at one end and ST-4 at the other end and suitable for guiding from the camera or direct from a computer. Thanks very much for any help you can give.

Apologies for a somewhat stupid question. I am setting up my G11G mount and 12" lx200. I have yet to balance it. To make sure all is secure I have tightened just about every knob in sight. I cannot now adjust the altitude adjuster. Could be by the time this is answered I have the solution, but if I loosen the DEC clutch - is there a chance the counterweight bar will dropout? I'd hate to hurt my tootsies. And is that the correct way to do it? Cheers Dave

Here is an unguided shot of the western veil. It was taking with my TMB 105 mm F6 refractor, my trusty ZWO 294 and my G11T mount with the new L6.2 upgrade running with PEC model uploaded from PEMPro. This was taken at the end of the session where I created the PEC curve, so I was just curious as to how an unguided image would be. I believe it is about an hour total integration, with 2 minute subs. Turned out better than I anticipated, considering it is unguided and I was just fooling around. Thought I would share! JMD

I have a GM8 non-Goto 492 mount. Until recently everything was working fine. Last night, I could not get the mount to slew in RA. It was tracking fine in RA, so I don't think out is a problem with the motor. Moving in DEC was fine through the hand controller. I switched cables, and it didn't he change. So I think the problem is either in the hand controller or in the output from the 492 box. I am suspecting the hand controller since the 492 box is still sending tracking signals to the RA motor. Neither RA button on the hand controller is working. Does anyone have an idea how to further diagnose this problem? If it is a problem with the hand controller, can it be fixed, or is it possible to buy a new one from Losmandy? (I did not see an obvious replacement on the Losmandy site). Thanks for any advice you can give.

I have a Titan mount, which I love, but I'm having an issue with the hand controller. Last night after plugging in my hand controller into the Gemini Mini the touch screen would not respond. I shut down the mount and took the hand controller apart and reseated the Micro SD 4GB chip, which I was informed would solve the touch issue. When I again turned on the Hand Controller the menu was Red……….. I then tried the Gemini PC Controller by clicking on the Gemini Icon in the System Tray located at the bottom right of my laptop…Win11. I brought up the Categories and selected Kornephoros in Hercules. I clicked on the Sync then when to Rasalhague but it told me Object could not be reached. What I life in San Diego and the Gemini II has my location set to here but when the Hand Controller worked the other night I was able to align on Rasalhague without any issues. I then tried the Hand Control in the Gemini Server which did not show any way to select a star for alignment. I then tried the Mobil Hand Controller which also did not allow me to align on Rasalhague. Any suggestion on how to ‘fix’ the Hand Controller touch problem? Or is there a better Web Based interface for the Hand Controller? Kenn

Hi All, I've G11G with Gemini2 version 5. I've mounted my RASA11 fairly balanced and would find that when it in position east-pointing-west and close to zenith, sometimes I get message Dec Stalled on the controller. however the mount continues to track and I do not get any error in my software controller on my Windows laptop. Do anybody know about this issue? The only thing I can think of is the dec balancing may be slightly heavy to the rear side but I'm not sure. I tried to find about this on Gemini's website but could not find anything. Any inputs on this is highly appreciated. Thanks, Nikul