Setting the Timing
This is not going to discuss the effects of timing at all -- it will only
instruct how to determine the current timing, and to act as a guide on
setting the timing. To learn more about what timing is (a brief
description), click here.

Timing Diagram
This diagram is supposed to depict an electric motor held in front of the
observer with the motor shaft pointed
towards the viewer. The mounting holes are paired at the top and bottom.
The orientation of which side is up is unimportant. The neutral timing mark
is a line which runs from the motor shaft between the mounting holes. The
timing angle theta is the angle between this neutral timing line and a
similar line drawn between the motor shaft and the timing mark on the
endbell. It should be clear from the picture. An acute angle measured
clockwise from the zero timing line to the indicated timing line indicates
positive timing for a standard counterclockwise rotation motor. This is
desireable.
Photo of a real motor with a zero degree timing mark inscribed
Any problems, let me know, and I'll
try to rectify 'em. Lemme know if this page is clear or if you have no clue
what I'm talking about.