[PRejto (Peter)]

Hi Aidan,

I can feel your frustration!! Been there big time when I first got my MX (original model). I could NEVER get TSX to work. Period. There was a bug that SB wouldn't admit to. Finally they "fixed" it but it still never worked for me though others in the Southern Hemisphere claim it works. It always worked with PEMpro and I continue to use PEMpro to this day with my MEII.

So, were your most recent tests with PEMPro or TSX or both? If you tried with both have you tried comparing the two correction curves. They ought to look very similar (I'm talking about the actual curve you paste into the Bisque TCS. If they look really different that might provide some sort of clue.

I think you wrote in a previous thread that you did try the slew tests....moving a few arc-sec back and forth and you saw zero backlash. Is that correct? I'm not sure if BL in RA would prevent PEC from working. I think it wouldn't since the motion is always in the same direction....just faster or slower (no reversal as in DEC corrections).

You have now clearly run many PEC measurements over many different nights, some in better or worse seeing. Do the curves look similar? They should if they are valid curves. On your latest results what is your peak to peak uncorrected value?

Peter

EDIT: Can you post a picture of your correction curves? One made by TSX and saved to the mount and another of the curve generated by PEMpro and saved to the mount?