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quick PHD question


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thanks for that.

It did take quite a while for me last night (first time) took about 10mins? around 50 steps each way?

Sounds like I might have to adjust some of the default settings. But it was doing its job for at least 8 min subs so was happy with that.

Thanks

Michael

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Thats interesting.

I must admit at present I haven't been recalibrating between objects, no particular reason either. As Merlin66 says it doesn't take long, guess I should start doing it.

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Hi Michael,

You need to go into the brain config and increase the calibration step setting. This setting determines the length of each pulse that is sent during calibration. Long focal lengths need a lower setting and shorter focal lengths a longer setting.

As you've already determined that it did 50 steps and 15 to 25 is ideal, try doubling it, or slightly more if you want a shorter calibration time.

It's a good idea to do the calibration (and guiding) at at least 2 seconds exposure to prevent chasing the seeing unless the seeing is particularly good in your location.

If you change targets from one side of the meridian to the other you will need to recalibrate. I always recalibrate when changing targets by more than a few degrees, it takes a couple of minutes and I know it's going to be right.

Cheers,

Ian

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Michael, I always have a problem with 50 steps & then PHD gives up, if I am near Polaris, saying star not moved enough.

I then slew to somewhere in the SE & then go back to my subject. It has always been ok. I may calibrate & then go to another couple of objects in different parts of the NE, E, SE, & guiding is always ok.

Fay

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