|
Thanks Robby.
Differential flexure. Yes I'm not very happy with the guiderings I received. I've already rung the supplier and said I want another set. The adjustment screws are so loose in the threads that when tightening them up they will splay sideways and end up angled if I'm not careful with the tension. And when pointing towards the zenith the weight of the guidescope will still "bend" them. I ended up setting the guidescope up so that the front adjustment screw sit against the back of the lense cell to ensure the scope doesn't slide (has happened a couple of times). Having the GS so far back then makes balancing an issue.
The Meade comes with a mirror lock as standard so I was using that. It was one of the things that helped me decide to get the meade as I was aware of the mirror flop issue.
I thought that polar alignment was pretty good, but now that you mention the rotation of the Raw I did notice that when guickly flipping through them. I'll take more time next time to make sure its more accuratel
The other issue that I thought it might have been is a backlash issue. The autoguider seemed to struggle at times to get back to the zero mark when it did move off the center. The Dec line on the drift explorer window would move parallel to the zero line for quite a while before crossing back down. The same with the RA graph but nowhere near as much as the Dec graph line. I tried varying the K, Q, dead zone and interval parameters but when they started to make a difference the graph started zooming up and down all over the place. I'd then lower the settings and things would settle down for a while, then the dec would go up or down and then stay parallel again for a while. Does any of this make sense?
|