I also noticed a curiosity last night. ?Ekos has a “Plate solve and center target” function. ?It will automatically repeat this until the error is less than some amount (30 arcsec in my case). ?Lately it seems to be having more trouble zeroing in on the target. ?Here is a screenshot of what it did. ?Rows 8 through 18 are its trying to zero in. ?Note that the declination zeros in nicely. ?However, the RA seems to oscillate by overshooting the center each time (assuming I’m reading this correctly). ?It oscillates between a positive error and a negative error.

It seem kind of surprising it would be overshooting in this case.

Back to the guided results I posted initially, it sort of feels like something is slipping. ?It tries to make a correction, but doesn’t get there (or possibly goes too far). ?The most likely thing I know of that could slip is the connection of the motor shaft and the worm shaft to the Oldham coupler. ?However, I’ve verified several times that the set screws are tight. ?I don’t see how that connection could be slipping. ? Is there any place else in the system where slippage could occur?

Bill