Quote:
Originally Posted by DavidTrap
Chris - what Terry means is the Autoguider should be square to the RA & Dec axes. It means that if the scope "drifts" in RA it only has to correct along that axis (usually across the chip), rather than detecting it as movement both across and up or down the chip.
The easiest way to do this is make sure the sockets and light on the back of the autoguider are square to the telescope. If you're looking at the screen on PHD and use the buttons on your hand controller to move E-W & N-S you want to see the stars on the screen move horizontally then vertically on the screen. (It's a mechanical setup, not a software setup/option)
Keep at it Chris - it's a frustrating hobby, but eventually you'll get it sorted out. You've come a long way in Astro by yourself - no reason why you can't sort out astrophotography as well!
DT
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Ok,David-thanks for that.
Just had a quick peak at the writing and sockets on back of AG.It did look like it was slightly tilted.Can easily rotate guide scope tube in rings to line up.
So by doing those E-W N-S visual checks using manual,and seeing stars move straight up and down left and right-should confirm that issue of diagonal movement is sorted?
So from this thread-we have clearly identified two mistakes-Backlash setting not a zero-confirmed,and diagonal movement most likely.both of these seem fairly routine to go over and make corrections.
Not sure about the other possible causes mentioned,but clearly have something to go forward with.
Thanks All.