Servo motor range only 90 degrees?

longstaff:
In the text the servo motor is supposed to give 180 degree of motion, even suggesting cutting out a "half circle" to make the dial on.
My servo is only giving me 90 degree motion, which is supported by the picture on page 69 giving only a quarter circle for the dial.

Anyone know which one is supposed to be correct? or which is working for you?

Not all servos can actually move a full 180 degrees, that is just an assumption the arduino servo library uses. Perhaps a link to your specific servo may shed light on the topic?

Lefty