So I just checked all my measurements again - found one stupid mistakeI had translated 13.25" for Xt into 370 rather than 337mm - doh moment.
Once I fixed this Dome to OTA pointing improved in the Easter side of the mount and I noticed very strange behaviour.
- When pointing East of the Meridan - and multiple elevations in 30 degree incremnts to the SCP pointing was almost spot on so long as Xt was -ve.
- When pointing West of the meridan dome to OTA alignment was very good at all elevations provided Xt was +ve.
- When pointing close to the SCP the software seemed to miss the meridan flip.
When I reverted back to MaximDL aligning the dome to OTA - all alignments - both side of the meridan close to the SCP or due North - where all spot on.
Does this help identify the problem? Why should pointing East or West of the Meridan require the sign of Xt to flip? Is the fact I am not using a native Vixen SkySensor2000-PC driver but instead a generic Meade LX200 driver confusing meridan switches for the SkyX or its Dome management software?
So Current parameters are:
Dome Radius 44.9 MaximDL, 1150 The SkyX
East West offset -4.25 MaximDL, -108 Xm The SkyX
North South Offset -8.5 MaximDL, -217 Ym The SkyX
OTA to Mount pivot offset 13.25 MaximDL, needed +337 Xt in SkyX when scope West of Meridan and -337 Xt when Scope East of Meridan
Mount distance below Dome -26.5 in MaximDL and -673 in the SKyX.
Hope this helps define the issue better guys!
*** Chris Rowlands just commented on the Bisque forums that the LX200 driver doesn't know about Meridan side - so it will be interesting to see how The Bisque brothers step up to resolve this.