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Tachometers

Tachometers

Servo-Tek DC Tach Generators have been an industry standard for over fifty years.

Servo-Tek Tach Generators provide a convenient means of converting rotational speed into an isolated analog voltage signal suitable for remote indication and control applications. While the following pages contain information on our most popular Tachometer models, we also manufacture countless special dc

Tachometer Generators for specific applications.

Applications - DC Tach Generators in Servo Systems

Combining high accuracy with low driving torque, Servo-Tek tach generators are ideal for use in servo systems. Tach Generators are particularly suited to application in precision integrators and velocity servos, both of which require a highly linear speed/voltage relationships with minimum ripple. DC Tachometer Generators are also excellent rate generators for velocity damping in position servos.Servo Motor DC Tachometer Generator .250" dia shaft 3volts/1000rpm

Speed Transducers/DC Tach Generator

The nearly pure dc output-with no phase shift-allows Servo-Tek Tach Generators to be used as feedback transducers for numerous types of equipment, including fast-response servos and other devices.

Tach Generator Construction

Servo-Tek Tach Generators are housed in aluminum casings protected in accordance with Mil-C-5541 or Mil-A-8625. Alnico permanent magnets are used. Armature shafts are stainless steel, and rotate on fully-shielded stainless steel ball bearings. Commutators are made from an alloy containing 95% silver. Armature laminations are wound with Isomid insulated wire, over Teflon slot insulation. The entire armature is impregnated and baked, resulting in a NEMA Class H insulation system.

Brush Life/DC Tachometers

Tachometer Generator brushes and commutators are matched for long life and stability. Operation at 1 mA output will deliver maximum brush life.

Linearity/DC Tachometers

Linearity, of Servo-Tek DC Tach Generators, at any speed is better than 0.1% of the output at that rpm.

Ripple/DC Tachometer

The DC Tachometer Generator ripple rms value will not exceed 3% of the dc value at any speed in excess of 40 rpm on standard units; 1.5% on low-ripple models.

Bidirectional Operation/DC Tachometers


All Servo-Tek DC Tach Generators operate in either rotational direction. That direction can be determined by output voltage polarity. Output (in either direction) is held to a tolerance of 0.25% of the average output.

Stability/DC Tachometers

Optimum brush and commutator combination gives 0.1% stability. Highly stable output gives no evidence of long-term drift.

Breakdown Voltage/DC Tachometers

Servo-Tek DC Tach Generators are factory tested with an ac potential of 1,250 volts rms applied for one second between (either) terminal and the shaft. Series E-500 volts.)

Temperature Range


Tachometer Generators are designed for continuous operation in ambient temperatures ranging from -55°C to +100°C(-67°F to +212°F). Voltage output at 25°C will not deviate by more than 0.01% per degree of change within the range of -20°C to +75°C. All Tachs are temperature compensated, with the exception of Series D and E.


1 - 5 of 5 records
  1. A Series - DC Tachometers
    DC Tachometers with output signal between 1 and 10 volts/1000 rpm [more info]
  2. B Series - DC Tachometers
    DC Tachometers with output signal between 11 and 24 volts/1000 rpm [more info]
  3. D & E Series - DC Tachometers
    DC Tachometers with output signal between 25 and 45 volts/1000 rpm (3V/1000 rpm for E Series subminiature tach) [more info]
  4. F & H Series - DC Tachometers
    DC Tachometers with output signal between 1 and 30 volts/1000 rpm & low ripple [more info]
  5. Sealed & Ruggedized Tach Series - DC Tachometers
    DC Tachometers with output signal between 2.6 and 45 volts/1000 rpm [more info]
1 - 5 of 5 records
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