OK, it dawned on me that I've been a total idiot.....

[Starwiz]

.....but posting this in the hope it may help stop others committing the same mistake.

I was using the output from my guide scope / guide camera to polar drift align in PHD2.

Of course, the guide scope almost certainly isn't aligned with the polar axis of the mount.

Doh!

John

[andrew s]

Not sure it needs to be. They drift is due to the axis misalignment not the optic. 

Regards Andrew 

[Starwiz]

4 minutes ago, andrew s said:

Not sure it needs to be. They drift is due to the axis misalignment not the optic. 

Regards Andrew 

Ah, you may have a point there so perhaps I've been overthinking things.  Struggling to get my head around it.  🙂

John

[alacant]

58 minutes ago, Starwiz said:

overthinking

Hi. Yeah, I think so. I'm with @andrew s on this.

Anywhere near the meridian and equator for az then around 90° east or west of there for alt. Operatives being 'near' and 'around'. It doesn't matter if the guide telescope is aligned. It only takes a few minutes; there's even a cheat sheet for you to fill in;)

HTH

Edited March 9, 2020 by alacant