Wow, I'm still a little tired from last night, but I feel I had to post this new update to my flexure issues. Maybe it will help someone else and offer up a nifty modification I made to my Atik One OAG, thanks to a suggestion by Peter in Reno.
The problem I've been fighting involved my Atik GP guide camera. It was difficult to connect to either PHD2 or TheSky. Something also may have been wrong with it, because it didn't seem very sensitive. On the suggestions of folks here, I picked up a Lodestar 2 last week. Wow, what a nice camera! It connects with everything, and I was up and running (camera-wise) in about 5 minutes. However, when I tried guiding through my off axis guide scope, I was still getting flexure.
I tried for several weeks to determine the cause. I remembered what great guiding I had the one time the OAG did work, but the Lodestars 12.7mm backfocus wouldn't allow me to reach focus using the Atik's OAG with its designed 5.2mm backfocus. Enter Peters' in Reno's suggestion from my other thread. He suggested I make a 7mm spacer to place behind the Atik's OAG and connect it using longer cap screws. So, last night I fashioned an adapter on my lathe and mill, a 7mm aluminum spacer with a raised step ring. It took me about an hour to machine from the billet. Although it had just rained and the humidity was almost 100%, the stars were out, so I went out to try and achieve focus and possible get a test image in.
I set the helical to the midpoint of focus and focused the main imaging camera. Next, I focused the Lodestar. Hey! Success! I only had to tweak the focusing helical a turn or two to get both cameras parfocal! With both cameras running, I quickly did a 54 point Tpoint run and slewed to M16. The acid test would be imaging in the Southern sky, the area I've always had the most flexure issues. I imaged M16 in HA for 600 seconds as an experiment. Did it work? In a word...spectacularly! I was able to guide easily up to 30 minutes, and every shot I took last night had round stars! The only failure I had came from PHD2 when I lost the guide star.
So, the good news is the flexure issue seems to be solved, PLUS I still can use my nifty Lodestar 2 AND get great connectivity in PHD2. No more pesky driver issues. Here's the setup....
Edited by APshooter, 18 August 2015 - 01:25 PM.