Avalon PHD2 Guiding Logs?

[Odiug]

Dear Avalon Enthusiasts,

 

Do you have PHD2 Guiding Logs that you could share? Preferably at least 30 minutes long.

I am curious about the contribution to the overall error from the individual parts of the belt reduction gear. PHD2 Log Viewer provides nice analysis capabilities for that. I am especially interested in the frequency analysis.

Background is that I have built a motion module that uses a timing belt gear reduction quite similar to the Avalon mounts. Performance is quite good already, but I would like to compare it to the "real thing". 😃

 

CS

Guido

[Odiug]

Really? Nobody using an Avalon belt-driven mount with PHD2 guiding?

I assume they are so good that no Avalon owner bothers to look into the "mount" forum.

Greetings + CS

Guido

[sloz1664]

Hi Guido

Just picked this up. 

Steve

[StuartJPP]

Only just seen this thread. I use an Avalon M-Zero so not sure if it is relevant to you or not but here's the log file from my last proper session.

 

PHD2_GuideLog_2019-11-30_181235.txt

Edited June 12, 2020 by StuartJPP

[sloz1664]

Here's a guide log from an Avalon Linear Reverse

PHD2_GuideLog_2020-05-29_220415.txt

 

Steve

[Odiug]

Hi Steve, Hi Stuart

Thanks a lot for the log files. Quite insightful for me.

Steve's Avalon Linear Reverse shows the frequency components that I would have expected (periods in minutes):  7.2 (very small), 36, 180 (very small). These are periods when a tooth of a timing belt has moved by one length for various stages in the gear reduction. Not sure what causes a period of 122.5 minutes.

Interesting for me is also Stuarts log, which has different main frequencies. I somehow expected the gear rations would have been the same in all Avalon mounts. It seems the M-Zero uses different gear stages.

May I ask which telescopes you were using on the mount, e.g. how much the mounts were loaded?

Greetings + CS

Guido

 

[Odiug]

Correction: Periods are in seconds, not minutes!

Sorry, Guido

[StuartJPP]

Hi Guido,

My setup is fairly static and looks like this:

The total imaging weight is about 6kg with all the accessories attached, so well within the limit of the mount.

In the configuration software there is a an option to select the mount type, this sets the torque and probably also the gear ratios.

Cheers,

Stuart

[sloz1664]

Hi Guido

My setup is housed in an obsy and the total imaging weight is around 13.5kg.

Steve