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Anthony RS

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Everything posted by Anthony RS

  1. I did use a very small amount of grease after I cleaned since that's what others usually do when hypertuning their mounts. Wouldn't using more grease make the mount sticky and sluggish again?
  2. That makes a lot of sense actually. I'm not sure if the worm and gear are perfectly aligned although I did use the same spacers that were before. So I guess there's nothing I could do except wait till I can upgrade to a better mount.
  3. Thank you William for your great explanation. Unfortunately, I live in Beirut, Lebanon so I have no one to go to. I've hypertuned the mount myself and so I'm checking if everything is as it should. I think the grub screws are tight enough but I'll double check. As for the worm-Ra gear mesh, this is where it's getting tricky with me. I seem to have a lot of backlash in the RA axis which shows as slop and free play. No matter how much I reduce the spacing (till the motor binds) the slop is always there, I've also tightened the worm's locking ring but the free play is still there. I was wondering if you know what could be the cause of that. According to Ed from DSP, free play is unavoidable since before hypertuning, grease was masking this slop, but after cleaning and re-greasing, there's no way I could fully get rid of this slop. I'm worried now that I might have the worm-gear mesh a bit too tight to avoid even more free play but I don't know if loosening it a bit more would cause my tracking to get worse. I've got good tracking results during my last test but I don't want to cause any damage to the worm and gears
  4. Hello, Here are a couple of videos for the gears of my AVX. In this first video, https://www.dropbox.com/s/btv9q9k8pkv3k1p/VID_20190319_155428.mp4?dl=0, do you think the gears are too close and tight together or is it fine? In this second video, https://www.dropbox.com/s/qj3dygvrc0s17zc/VID_20190319_160042.mp4?dl=0, is that kind of worm gear backlash normal or is it too much? In this third video, https://www.dropbox.com/s/sd9dlx5d5qxa4ed/VID_20190319_165746.mp4?dl=0 , is that sound normal? It sounds like it's slowing down then speeding up? Cheers! Anthony
  5. I also used PHDlogviewer to check the "drift corrected" graph and here it is. Any ideas?
  6. Oh ok got what you mean! The image I attached is around 14 minutes of guiding, that's more than a worm period. Here's the log file also https://openphdguiding.org/logs/dl/PHD2_logs_lZyR.zip Once it clears, I'll try to test without guiding to check my PE curve anyway and I'll try PEC training the way you suggested but I really doubt it will help since it's very similar to what I did with my PEC training and got no different results
  7. I did train PEC with PECTOOL and it didn't work. I think it's because the peaks aren't periodic?
  8. i tried with and without pec on same result.
  9. I was just thinking the same about calibration. I usually calibrate close to dec 0. Do you think if something went wrong with calibration such peaks would occur? Especially since they're all towards the positive part of the graph?
  10. Thank you so much William! It could be that the worm to ring gear pressure is overtight since I can hear the motor working hard actually. Could that actually be the problem? As for the worm shaft, there is no play and it turns relatively smoothly. The RA rotates freely and smoothly. Your technique of pointing to a star and adjusting worm mesh pressure will not work with the AVX since I have to remove the whole motor assemble to be able to reach the screws for worm adjustment It could be that the whole RA gear isn't properly secured? the spacers in the AVX are terrible but I don't know if I Decide to replace them, what thickness to use.
  11. I did try to run guiding assistant. I highly doubt it has anything to do with the PHD settings. I've tried everything. I did not hypertune myself and I'd rather not mention who did it but I don't really think you know him. Anyway what's done is done, I would rather discuss how to fix it myself if possible rather than who hypertuned it which won't help me find a solution. Cheers,
  12. Hello, I'm having an issue with my mount's (AVX) RA tracking /guiding after "hypertuning" the mount (if you can call it that). When pointing North, guiding is great (around 0.9 arcsec total RMS error); however, when pointing towards somewhere else, I'm having these ridiculous RA peaks (up to 15 arcsec peaks). I can only test my mount towards the North, and towards the low west, so I couldn't test yet what happens if the RA is more horizontal, parallel to the ground. What's noteworthy is that the RA peaks are always towards the positive side (upwards) and never to the negative (downwards). I attached an image of how it looks like... terrible i know. Here are some things that I've eliminated as culprits: 1- Polar alignment. In the attached image, polar alignment wasn't good but in other tests, I've had near perfect PA with the same results (dec down to 0.3 arcsec error). So polar alignment isn't the culprit. 2- Balance. I've tried slight east heavy balancing up to extreme east heavy with little difference. 3- PHD settings. Tried all possible settings (exposure time, algorithms, ...) 4- Cable drag. I made sure as much as possible that there was no cable drag. I was only using one cable for the guide cam anyway so it's highly unlikely it's the culprit. 5- Wind. I'm not entirely sure about this. I did feel some slight breeze. I will have to do more tests on windless nights to make sure it's not the culprit but the wind tonight was too mild to be causing such high peaks. Will keep this in mind though. Here are the possible culprits that I could think of: 1- Ever since the mount was "hypertuned", I could feel the RA axis has a lot side to side free play even when the clutches are fully tightened. I tried to reduce the spacing of the worm gear, but even with the motors binding, the slop is still there. I've also tried tightening the locknut at the bottom of the RA axis, and the locknut that holds the worm gear with no results. The free slop is always there. I though that could be solved by balancing east heavy but apparently it's not especially (i think) since I only tested with the RA axis almost vertical (maybe 20 degress max). 2- The worm gear spacing. This is my number 1 culprit but I can't tell if I should reduce the worm spacing or increase it. I'm sure if I reduce it, the motor will bind and if I increase the spacing, the free play will increase. 3- The mount is dead. Please let me know if you have any idea what could be causing these peaks and could someone explain why are all the peaks towards the positive side of PHD? could that mean the worm is loosening so the motor is speeding up then when the worm tightens again, the motor goes back to normal speed? or vice versa. and would that mean I should reduce or increase the worm gear spacing? Or could it be cause by vibrations caused by the slop in the RA axis? I would appreciate any help and any ideas. I've been struggling for 2 months now trying to fix this issue. Thank you!
  13. I'm really sorry for trying to revive an old thread but I really need your help. I've stripped down my avx, cleaned and replaced the bearings but I'm having a hard time adjusting everything optimally. Basically I'm having a lot of side to side free play in the RA axis no matter how much I tension the worm shaft, worm to ring gear, and the motor to spurt gear. I tightened eveything till the motor binded and still had a lot of slop. The result is my guiding has huge peaks every minute or so which I think is because of the free play, not sure though. Did you have any of these issues and do you think the peaks might be due to the slop or smthing else like tightening everything too much or vice versa? Also how can i tell if the worm gear is not tilted and is sitting right at the center of the ring gear? It seems impossible to tell. Appreciate any help! Anthony.
  14. one more question, were the guiding results you got using SGE close to the actual result when guiding on a real star?
  15. Thank you Ken! This appears to be the same manual I read. I don't know why I don't seem to understand fully the procedure, especially the part on how to use a timer to calculate the distance. Could you share your own steps in a short clear way? Cheers!
  16. During this bad weather, I wanted to try and find a way to test my tracking/guiding indoors after hypertuning my mount. I stumbled across this software called SGE. Apparently it is supposed to emulate a star going at sidereal speed however the manual seems to be google translated from French and is not extremely helpful. Has anyone ever tried using SGE with any success and if yes, could you share a step by step guide on how to set it up? (not using the laser method though). Cheers! Anthony
  17. I'm sure it's not the CW shaft that's moving, it's the whole axis. I also removed the cover and the play doesn't seem to be originating from the 2 brass drive gears' it is most likely from the ring wheel and drive worm then? The weird thing is that if I adjust the spacing a bit more to reduce the slop, the motors will bind and the slop will only be reduced slightly. Is there anything else that might be causing this? I also looked at the worm gear to check if it's not tight enough (from the locking nut) but it looked fine to me. I also tightened that just in case but the issue remained. This is very frustrating I feel like throwing the AVX out the window.
  18. RayD would you be kind enough to check the video in this link: https://www.dropbox.com/s/dfzuzx0fkuq6b1u/1 (2).mp4?dl=0 It shows what kind of play I'm talking about. When my whole gear is setup, it really rocks side to side. I didn't get what you meant by the main problem being the main bearing. To try and remedy this, I tried tightning the worm to ring gear spacing, the worm shaft, and the motor gear to the worm gear. I also tried tightening the thrust bearing (the one on the bottom of the RA axis). Nothing worked, the play was still there but the motor was binding. I'm really frustrated. I'd appreciate if you could elaborate more and give me possible solutions Thanks so much. Anthony
  19. The play is lateral (from side to side). I didn't get which gears you mean. Do you mean the motor's gearbox or the Motor Gear with relation to the worm gear (the one in the image below)? If it's the gears in the image, i've adjusted them as close as they can get with some minor backlash. I don't think they can be adjusted further otherwise they will bind
  20. Turns out that sound I was hearing was the motor housing rubbing against the RA!! Once I managed to clear that (which wasn't easy for some reason!) the sound disappeared and the axis got smoother; however I do have one more issue if you could help me with. I do seem to have a lot of free play on the RA axis. With the clutch fully tightened, holding the CW shaft and moving it slightly will produce some play in the RA (forgot to mention that while guiding I'm having periodic 5 to 8 arcsec peaks every 1 minute approx.) How can I fix that free play, is it by reducing the space between the worm gear and ring gear, tensioning the tensioner with the thrust bearing at the bottom of the RA shaft, or by tightening the lock nut that holds the worm shaft? this is very confusing Also do you think this free play is what's causing these periodic peaks in tracking or could it be smthing else? Thanks for your help!
  21. ah that's a good point. I can hear the same noise when moving it with my hand with the clutches released. Although I did grease the top washer you're talking about but it may have gotten loose. i will check that too. You've been very helpful!
  22. Ah yes I got what you meant, with the tensioning thing. As for the washer issue, if I remove the washer, the ring gear will slip downwards towards the collar with time. Do you think a lot of grease will make it stick? and how good would that be
  23. i did grease it but it probably needs a more generous amount of grease. I will try that.
  24. that thin ring is just a spacer for the collar since he used a different sized bearings, i got the right one so no need for that ring. As for the washer, I am using it currently but it just feels and sounds like it's rubbing on something. I did not get this part though "You adjust the tension with the retaining screwed plate at the back.". Could you elaborate more please? thanks for your help
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