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Manifold: A fluid conductor which provides multiple connection ports.

Manual Control: A control actuated by the operator, regardless of the means of actuation Example, lever or foot pedal control for directional valves.

Mechanical Control: Any control actuated by linkages, gear, screws, cams or other mechanical elements.

Meter: o regulate the rate of fluid flow.

Mechanical Time Constant: The time for an energized DC motor to reach 2/3rds of its set velocity. Based on fixed voltage applied to the windings.

Micron: One millionth of a meter or about 0.00004 inch.

Microprocessor: A digital computer based on a single miniature integrated circuit that offers programmability and computational ability for use in electrohydraulic control application.

Mid-range Instability: Designates the condition resulting from energizing a motor at a multiple of its natural frequency (usually the third orders condition). Torque loss and oscillation can occur in underdamped open-loop systems.

Microstepping: An electronic control technique that proportions the current in a step motor's windings to provide additional intermediate positions between poles. Produces smooth rotation over a wide speed range and high positional resolution.

Motor: A device which converts hydraulic fluid power into mechanical force and motion. It usually provides rotary mechanical motion.

Multimeter: A device (VOM or DMM) used to measure electrical quantities.