Hi Ross,
I have never had any significant problems with DEC backlash on my mounts. Perhaps I have been just lucky. I have thought for a long time that the backlash was huge. Later it appeared that as soon as you do the polar alignment in the StarBook controller on MORE THAN ONE STAR, the StarBook software starts compensating in DEC axis. Effectively, I saw huge jumps in DEC every few minutes and they were quite regular.
Since I got SXD, I was using mainly this mount. Judging by the log file from autoguiding, there is no backlash in DEC at all. OK, there must be some backlash but it looks like it is very small. I can see correction on both the sides of the axis, no sudden jumps, no persistence on one side.
I will do some tests with SXW, particularly, that I may decide to sell this mount and I do not want anybody to complain about it or get a Voodoo doll that looks like me
. I will check later whether I have log files from this mount after installing NexSXD.
I will also try some unguided exposures, say 30s, 60s, 120s on both the mounts. Thanks for the suggestion.
BTW, I have not applied any backlash compensation in the NexRemote nor in the CGE-Pro hand controller.
Regards,
Matt