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It may well be a cable problem..and I will write to Shoestring astronomy, I hear he is very helpful
The two graphs extracted from the log show what is happening--unguided there was a drift -in both Dec and RA of about 15 to 16 pixels over 160 seconds or so; with guiding turned on DEC is guiding almost sub pixel but RA is oscillating out of control
so would this be a cable problem or a software problem?
The other thing I noticed is that in the calibration steps in RA east the star is hardly moving-more often than not the star continues to move in the same direction as when the RA West calibration is taking place-it should be reversing direction but it doesnt seem to- or if it does it moves only a couple of pixels not the 25 odd in the West calibration step
does this sound like a
problem with PHD guiding? with GPUSB and cable? with my mount?
appreciate your comments and will certainly check the cable
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