Quote:
Originally Posted by cventer
Looks like you are over correcting every RA move. Guider is moving mount too far then moving too far back again.
Try reducing aggressiveness even more or and dialing the Max RA down as well
Also make sure the backlash compensation on your mount is off and you are slightly weight biased to theeast side of the mount to keep the worm gear from bumping against the direction it it moving which can also cause these kinds of oscillations.
Also what focal lenght is your guide camera ? Depending on answer to this your min move may be too low as well.
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The guider is an Orion 80mm . 400mm FL. Backlash comp on the mount? Is that in EQmod? Will look at weight bias. Is reducing aggressiveness etc. something that you can do whilst guiding or do you need to have stopped guiding first?
Quote:
Originally Posted by mithrandir
The vertical grid spacing on the graph is 1 pixel on your guide camera. You need to work out the ASP for both the guide and imaging cameras.
For example I might get 0.79 ASP on the image camera at f/10 and 3.81 ASP on the guide camera. So I need to keep within 0.25 of the centre line to stay within 1 pixel on the image camera.
If I change imaging scopes I get 1.69 ASP at f/7.5, so then I only need to stay within 0.5 of the centre line.
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Sorry Andrew - "ASP"?