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Here is a short summary, modified from another helpful post on IIS that I struggled to re-locate!
1. Point telescope east roughly 30 deg above horizon.
2. Start the webcam/CCD/DSLR with a 45 sec exposure
3. Wait 5 secs, at guiding speed, move mount using RA controls for ~20 secs, then reverse direction for the remaining 20 secs (no pause)
4, The image will show a star trail in a "V" pattern. The gap is how far out your Polar Alignment is.
5. Adjust your Alt manual adjustment a little. Then repeat the above exp/move again.
6. If you have adjusted the mount in the right direction the gap in the "V" should have gotten smaller, if bigger you've adjusted the mount in the wrong direction. Make appropriate adjustments again.
7. Continue until you get a straight line.
8. Then slew to about DEC zero (celestial equator) and near the Meridian, and repeat but this time adjust the azimuth and repeat until line is straight.
Go longer exposure for a better PA. The reason for the 5 sec pause means you can tell which line is which as on will have a blob at the start.
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