Prior Scientific ProScan III Manual page 77

This is also the movement of 1 pulse or the minimum stage movement.
Stepper Motor - A motor which when current is applied generates a holding torque.
The motor is rotated by switching the coils on and off. The stepper motors in Prior
stages and focus motors generally have 200 steps per revolution, which is then
micro-stepped to 50,000 micro-steps per revolution.
TTL – Transistor to Transistor Logic. An integrated circuit with its inputs and outputs
directly tied to transistors. Inputs and outputs are low voltage (<1 VDC) and high voltage
(>3 VDC).
Transmitted Illumination - Light which passes through the object.
Upright Microscope - A microscope that views the object from above.
X-Theta Stage - A stage with motion in both the X direction and Rotational or Theta
Direction.
XYZ - The term used to describe the axes of a microscope that move left/right(X),
front/back(Y) and up/down(Z).
© Prior Scientific Instruments Ltd Version 1.12 June 2017
ProScan® III Manual
Page 75