Spikes in DEC #Guiding


Seb@stro
 

I seem to have some very consistant spikes (about 3" in magnitude) every 130 seconds now. I have monitored for about 20 minutes long and they are very predictable... Note that I have reduced exposure time to 2.0s, just to see if I would see more spikes when sampling faster.



Roland Christen
 

This indicates a severe unbalance in Dec which puts a lot of pressure on the gear teeth and causes high friction.

Check your Dec balance by sending the mount to Park1 or 4 or 5 and loosening all 4 clutch knobs fully. You must be well balanced in Dec, especially if your load is heavy. With clutches loose, feel the weight as you move the scope back and forth.

Roland


-----Original Message-----
From: Seb@stro <sebastiendore1@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, May 3, 2021 12:59 am
Subject: Re: [ap-gto] Spikes in DEC #guiding #guiding

I seem to have some very consistant spikes (about 3" in magnitude) every 130 seconds now. I have monitored for about 20 minutes long and they are very predictable... Note that I have reduced exposure time to 2.0s, just to see if I would see more spikes when sampling faster.



--
Roland Christen
Astro-Physics