AM5 guiding issue, random RA instabilities: Page 2

AM5 guiding issue, random RA instabilities

kaelig

Tech@ZWO
Good Morning, I have not done the modification belt for the moment. I want to characterize the mount behavior before and after the modification. Under Windows, with PHD2, I could disconnect the guiding orders send to the mount in order to characterize the mount. Could I characterise my mount with the Asiair? I see two possible solutions;

1) disconnect the USB cable between the Asiair & the mount
2) set the RA & DEC agressivity to zero in order to avoid guiding command towards the mount

I have verified my mount. In June, I have update the firmware of the mount because I receive a request message.
I have the 1.5.6 version, could you post the 1.5.1 firmware version in order to come back before the update.

I try to make a "report" in order to help you in your investigations & solutions.

Thank you for your help

Mxc89ZQV

I am experiencing the same problems. They started slowly about 10 days ago and have gotten progressively worse, to the point that the AM5 is no longer useful as an AP mount. I will try adjusting the belts to see if that helps, but this does seem to be a mechanical problem.

kaelig

Mxc89ZQV
I understand what you live. I wait answers, I continue investigations. As you, I have tried to adjust the belts. I wait clear sky in order to test my changes. In parallel, I have build a solution with mini-computer & NINA in order to see if it is a mount issue or a soft issue.

My opinion for the moment: a conflict between the mount firmware & the multi-guiding soft.

What I could not explain, it's why it becomes worst and worst after each session. Is an internal reference value change after the issues that generate a bad slope? I have tested a lot configurations with the Asiair & without sucess. I am very annoyed by this situation.

F5146666

Try to give the RA-axis a couple of turns in both directions in full speed. This could probably help.

kaelig

F5146666

What do you mean? could you explain for me and for the other readers,

Thank you

F5146666

kaelig

Turn your RA-axis/harmonic drive without equipment attached to the saddle with the maximum slew rate possible fully in both directions (a couple of times). This distributes lubrication and reduces static friction (at least a bit) and consequently reduced the occurrence of RA-spikes/issues for some people at least temporary.

I am curious if this improves the situation also with your error patterns.

Andreas

o82KUdLn

Just for the records, I am affected as well.
I own 2 AM5N mounts and I can confirm that one mount suffers from the issue, the second one is fine. For me the spikes occur rather irregular:

after meridian flip, tracking is fine:

As I have 2 different rigs (all ZWO stuff, ASIAIR, EAF, EFW, scopes are Takahashi Epsilons), I exchanged equipment with no effect, The bad mount keeps showing the spikes. I tried all kinds of guiding settings. Lowering max RA duration could reduce the size of the spikes, but not avoid them. Reducing guiding exposure to 0.5 or even 0.2 sec also could not avoid the spikes.
Curious to see if there will be an RCA from ZWO.

Regards, Thorsten

Maritime

I feel for you guys and I’m glad I sold my am5. Zwo support is awful. Endless, useless, frustrating delays and loss of use. I am moving to Nina and moving….

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