Hello everyone,
I am trying to figure out what figures I should use for Calibration Step and RA & DEC Duration when I autoguide my CEM70EC2 Mount with ASIAIR Plus (AA+) Refer to PHD Log - uploaded..
I am currently using a SW ED72 Scope with native focal length, and ZWO guidescope (FL=120mm) and ZWO guide camera. The Encoders on my new Ioptron CEM70EC2 Mount cannot be turned off as far as I know. I have been using 2 or 3 secs for Guiding Exposure time, so maybe its bumping the mount too often. From what I understand the Encoders reduce the Mounts PE so it runs more accurately and the Guiding Software should only occasionally bump the Mount where needed to keep it in line. I also read that using a longer guide exposure like 10 sec will bump the mount less often.
What calibration Step and MAX RA and DEC Duration figures should I use on the AA+ Mount setup page?
The current AA+ defaults are 2000, 2000, 2000 and I have read that if you are using a ZWO mini Guide scope with FL=120mm these figures should be in the vicinity of 8000 to 10000? I know when you do a calibration, these higher values move the mount more than if you use the default 2000 values and requires less Steps to calibrate. However if you are using an OAG with the FL of the Guider being the same as the FL of the scope, then these figures should be in the range of 250 to 500ms. I would be interested to know your thoughts on all of this and what would be appropriate for me.
Also when guiding, what aggression values should I use? I would presume using lower figures such as 10 to 25% would keep the autoguiding bumps down to a minimum? Otherrs say to use higher aggression settings, so that is a bit confusing.
What Guiding Rate, should I try different values 0.25, 0.5, 0.75 x Siderial to see which gives better RMS values or just leave it at 50%?
thanks.
Nick
