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Above illustration shows good azimuth.
Above illustration shows bad azimuth.
all images copyright © Steve Clarke
How to adjust Azimuth when a tonearm does not provide a means of adjustment:
Above image shows the cartridge with stylus standing on a mirror that has been carefully placed on the platter. The image reflected in the mirror needs to indicate close alignment to the cartridge above it. This method is only useful for aligning the easier elements to see, such as the external body features. Therefore, if the cantilever is not correctly aligned to its body at the factory, or by the re-tipper, this method may not produce the desired result. Nonetheless, it is a starting point and easy to check.
Back to the means of providing azimuth adjustment when the tonearm / headshell does not provide for it. Note in the above photo a small thin bar of lead sheet that is placed between the two fastener bolts and between the cartridge mounting surface ( or in this case a headweight) and the headshell surface. This "bar" allows one to adjust azimuth of the cartridge by simply tightening one bolt more than the other. Thusly "tilting" the cartridge slightly.
Here's a view after making the adjustment.
Other methods of azimuth adjustment to be explored in future additions to this page.