DC Tachogenerators or tachometers, are usually called "tachos" for short. They
that are used for measuring actual speed values, which in drive engineering
combine high control dynamics and ruggedness.
Encoders are devices used for
measuring speed and position in drive technology.
Types of encoders include: Incremental (Digital Tachos), Sinewave
(Sinus Tachos) + Absolute (Single/Multi Turn).
Variations of Tachos:
Solid shaft, hollow shaft + solid/hollow shaft.
Speed SwitchesMechanical switches: are commonly used for safety
monitoring of speeds in drive engineering, regardless of the control
Speed switches are devices used to monitor speed
Electronic switches: use a rectified voltage and
the potentiometers are set so that the relays are operated when the speed limits are reached.
Digital switches: use HTL or TTL signals from a rotary
incremental encoder that is independently of the drive control system
itself, to generate
an output signal for each one of three separately adjustable speeds.