On Wed, Jan 29, 2025 at 12:40 AM, Thomas Kallenbach wrote:
I have not used PHD2.? I've only used the asi air.? I don't know if the air produces a detailed log.
Hi Tom,
?
You will need to connect a laptop to your mount to run PHD2. The guide logs then appear in the Documents folder, which is what is needed. The apps I mentioned will only work with PHD2 files as far as I know. But PEMPro Log Viewer and PECPrep already know the typical errors associated with a Losmandy mount - 239s for the worm period, 76s for the bearings, 32s for the gearbox, etc. So, they will tell you the magnitude of these errors and which is contributing the most. How to dig this info out of an ASI Air, perhaps someone else will jump in with the technique. Most likely you jostled something in the drivetrain when you reassembled the mount. You may need to reseat the worm gear or potentially compress the worm blocks a little bit.?
?
But if you mount is guiding better on one side of the meridian than the other, you may want to go more east heavy with scope in RA so it will take up the backlash a bit more. This would mean sliding your counterweights up the shaft a little bit.
?
Good luck,
?
John
--
_____________________________________________________________________________________________________________________________________________________________________________
Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, NINA, Sequence Generator Pro and PixInsight user
