Linear Encoders Specifications

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Specifications


	Measurement Range		Range of distance measurement, or maximum distance measured.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Accuracy		Accuracy describes the percent deviation from the actual/real value of the measurement.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Linearity		Linearity is the maximum deviation from direct proportionality between the distance measured and the output distance over the measuring range.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Linear Encoder Speed		Maximum mechanical speed at which the encoder can operate and still meet performance specifications.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Operating Temperature		The temperature range over which the device must operate.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Encoder Characteristics


	Encoder Reading
	Your choices are...
	Absolute		Position signal is unique anywhere along travel. Exact position will be read after power cycling.
	Incremental		No unique position signal; encoder is zeroed after power-down and relies on another switch or encoder for initial reference.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Linear Encoder Technology
	Your choices are...
	Optical		Incremental linear counting is achieved using a light emitter and receiver; outputs can be sine-cosine waves or digitized square waves. Configurations include transmissive systems in which light passes through a transparent disk or is blocked by an opaque line, and reflective systems in which lines are segments of non-reflective space on a strip between reflective segments. Advanced optical technologies include laser light sources and CCD imaging of scales.
	Magnetostrictive		Magnetostrictive position sensors are noncontact linear position sensors that use the momentary interaction of two magnetic fields to produce a strain pulse that moves along a waveguide. One field is from a magnet that moves along the outside of the waveguide. The other field is from the waveguide itself.
	Magnetoresistive		Magnetoresistive linear encoders are more sensitive than Hall effect sensors. Magnetoresistive linear encoders are made of nickel-iron thin film on a silicon wafer and formed as a resistive strip. In the presence of a magnetic field, the resistance changes slightly.
	Inductive		Ferromagnetic elements such as steel balls are sensed along the travel path; the magnetic field change is sensed and encoded into a position signal. Inductive technology is often suitable for harsh conditions or where contamination by dust is possible.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Output


	Absolute Encoder Code
	Your choices are...
	Gray		The device uses a unit-distance coder where only one bit changes with the transition from one measuring step to the next.
	Binary		The output is represented in a series of ones and zeroes.
	BCD		Binary coded decimal. The output is represented by decimal numbers (integers) where each digit is signified by four bits.
	Other Absolute Output		Unlisted, specialized, or proprietary absolute encoder code.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Incremental Encoder Signal
	Your choices are...
	Digital		Digital output signal lines for direct interface with a processor or co-processor (typical for most encoders). Most typical is a square wave or two square waves that can be resolved via quadrature to four counts per line.
	Analog		Analog output involves two channels 90° out of phase (quadrature). The sine and cosine signals may be read and combined. The theoretically infinite resolution is limited only by the resolution of external digitizing device.
	Single Channel		Unidirectional or "tachometer" encoders. The single channel allows for one count per physical line.
	Pulse & Direction		A direction channel may be combined with single channel counting or multiple channel counting with quadrature.
	Reference/Index		Once per revolution "mark" or "home" position.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Signal Quadrature
	Your choices are...
	Signal Quadrature		Signal configuration in which two channels are carrying signals 90° out of phase. These signals can be combined to provide four or more encoder "counts" per line or other indicator.
	Search Logic:		Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Electrical Output
	Your choices are...
	Voltage		Output voltage is a simple (usually linear) function of the measurement.
	Current		Often called a transmitter. A current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise, impedance, etc. Useful when sending signals over long distances.
	Frequency		The output signal is encoded via amplitude modulation (AM), frequency modulation (FM), or some other modulation scheme, but the signal is still analog in nature.
	Resistance		An output consisting of a simple change in resistance, typically for a magnetoresistive device.
	Switched / Alarm		An "output" of a change in state of switches or alarms.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Interface
	Your choices are...
	Serial		A standard digital output protocol (serial) such as RS232, etc.
	Parallel		A standard digital output protocol (parallel) such as IEEE488, etc.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Linear Encoders Specifications

Measurement Range:

Accuracy:

Linearity:

Linear Encoder Speed:

Operating Temperature:

Encoder Reading:

Linear Encoder Technology:

Absolute Encoder Code:

Incremental Encoder Signal:

Signal Quadrature:

Electrical Output:

Interface:

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