Consistent RA Axis Issues with AM5N Mount – Massive Sub Losses: Page 2

Consistent RA Axis Issues with AM5N Mount – Massive Sub Losses

ASIMount-ZWO

R3Iro7Ea I'm sorry to hear about your unpleasant experience! If all your guiding parameters are set to reasonable values, please first ensure that the entire setup is stable and not prone to shaking. You might try re-securing the equatorial mount, camera, EFW, extension tube, etc., or consider using a sturdier tripod. Additionally, you can provide the guiding logs from the ASIAIR to help us further analyze the issue. If you'd like to determine whether the problem lies with the AM5N, you can try using NINA for guiding to see if it is a software-related issue.

R3Iro7Ea

ASIMount-ZWO

Hello, please tell me where I can send the session logs.

The equipment has worked perfectly with that configuration for a while, but due to the bad weather we've been experiencing in my region, I detected the fault at the beginning of May. Everything is stable and well-established. I've been working with mounts and telescopes of different brands for about 20 years. I've decided to use Asiair because I don't have the time to dedicate myself to installing NINA on my PC and testing until everything works. For that, there are other colleagues with the same problem who use PHD2. I can send you my session logs; just tell me where I can send them. I'll send you the session logs with the screenshots I attached, and as soon as I can start another session, I'll send them.

Sincerely, Alberto

fotisr

R3Iro7Ea if you have Instagram, dm. I have some information to share that might be helpful. It's fotis_reezo on insta. @F5146666

higbyrichard

I have the same issue on my AM5. It all seemed to have started after the latest update. Pulling my hair out and no parameter tweaking corrects the issue resulting in a wasted nights imaging. Let’s have a response from ZWO product manager. The guiding issue is cyclical within a 180 sec period moving from 0.5 to 1.28.
Richard

R3Iro7Ea

Hi colleagues,

Nothing, I'm just stopping by to let you know that I haven't been able to run any more tests yet, since it's the weekend when I can really spend all night looking at the data and taking screenshots. I also couldn't do that because it was cloudy, and now that it's clear, I have to work the next day, so sleep is imperative for me. I'll see if I can start collecting data on Friday or Saturday to try to give this a little more depth.

Have a good week.

3t2To05L

Same problem. I bought the mount in FEB/2025 and a few weeks later the problems started.
Attached is a graph of PHD2 without applying corrections to the mount. The problem recurs every 280“-290” approx. I see that it is not a problem that only affects me.
The mount has been sent to ZWO technical service through the supplier. Now I have to wait weeks or months.
Very disappointed. I seem to have bought a very expensive paperweight.

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Corsair

Make sure to tag @Tech@ZWO and @PMTeam@ZWO in your post as well.

3t2To05L

@Tech@ZWO @PMTeam@ZWO @ASIMount-ZWO
Nothing to reply?
Very worrying!

ASIMount-ZWO

I'm sorry to hear about your unpleasant experience! If all your guiding parameters are set to reasonable values, please first ensure that the entire setup is stable and not prone to shaking. You might try re-securing the equatorial mount, camera, EFW, extension tube, etc., or consider using a sturdier tripod. Additionally, you can provide the guiding logs from the ASIAIR to help us further analyze the issue. If you'd like to determine whether the problem lies with the AM5N, you can try using NINA for guiding to see if it is a software-related issue.
If your issue still has not been resolved, please contact after-sales support for one-on-one assistance or to arrange a repair for your device. Thank you for your continued support; we will keep following up on this issue until it is fully resolved.

3t2To05L

@ASIMount-ZWO:
If you have read this entire thread you will have seen that we have all previously performed the tests you suggest and then some.
We are all observing practically the same problem.
It would be to be expected from ZWO a more collaborative treatment, since it is clearly not an individual problem but a product problem, a shipment problem or a problem in the firmware.
Within a month of buying the mount, I have to disassemble the observatory to send the mount to China for a supposed repair, which will take three or four months. I will lose the whole summer and then ... we'll see if the problem doesn't repeat itself. Because ZWO does not explain what is the problem we are suffering.
Thank you for your attention.

ASIMount-ZWO

3t2To05L This issue has already been reported to ZWO's development team, and they will work to resolve it. You can send the device to the nearest after-sales service center for inspection and repair until the issue is resolved.

3t2To05L

ASIMount-ZWO
Are you claiming that ZWO is capable of repairing a mount without your engineers having discovered the source of the problem?
Every answer you give becomes more troubling.

Jaume

I have the same problem with RA.
I bought the Am5n on octuber 2024.

P.d.
Alberto, lo has podido solucionar ?

Jaume

I have all updates from asiair and last firmware of am5n

Jaume

Jaume
Loosing 35% of lights

Jaume

This is the image with bad stars.

marci

Hello,
I have the same issue with my setup AM5N + FF107 + reducer. I guide with ASI220 mini and evoguide 50ED. Usualy I guide between 0.4 and 0.7 RMS
From some weeks, I'm not able to have subs whithout guiding spike in RA. I think issue occurs after an update some weeks ago. I test some settings in guiding menu but no result. First night i had the issue, some subs were OK and after some years > star trailing and big spike in RA. I did a new test last night and no subs are OK whithout trails. I tested and checked all mechanicals parts and cable management.

phd2-guidelog-2025-06-16-235513.txt

748kB

Logs in attachement...
@ASIMount-ZWO @Tech@ZWO @PMTeam@ZWO

fotisr

marci time your spikes. Check if they are around 280 - 290 seconds apart. That's the period of the newest AM5N mounts RA drive.

marci

fotisr
It's around 5 minutes so it match with period of the mount. Spikes in RA reached 30" ...

Jaume

Yes, this problem start after some automatic asiair update on March/April .
I'm using asi2600mc main, asi178mc guide with askar fra500 and svbony sv109 60mm guide.

It occurs after 2 hours aprox making lights and when the tube is near the zenith.

fotisr

marci yes that was exactly my problem as well. Started after an asiair update in mid April and had around 290 sec of period. Don't waste your time to try and fix it. It's impossible. I've spent around 50 hours, testing everything you can possibly think. Everything. I've sent the mount to a service point and I'm waiting. I don't have high hopes to be honest. It's frustrating.... I just hope at some point weihht be able to get a new RA drive that's ok and be able to use the mount again. But what tella me that it won't happen again in the future?

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