Linear and Rotary Encoders

Mercury 2000 Smart Encoder Systems
Linear Encoder

Programmable Interpolation in Integer Steps to 0.078µm
Smallest sensor- 1/3 the size of other encoders
Revolutionary bolt-in alignment for many applications
Advanced SmartSignal electronics built into shielded D-sub connector
A-quad-B output with programmable interpolation in integer steps for resolutions to 0.078µm
LED set up indicators for sensor alignment and index location
Bi-directional index signal is repeatable to encoder resolution

Linear - 20µm grating pitch

To calculate desired linear interpolation multiplier, use the following equation

Interpolation Multiplier = Grating Period(20µm)/Desired Resolution(m/count)

System

Grading Period	20µm
Signal Period	20µm
System Resolution	5µm - 0.078µm is an integer interpolation steps (factory set or user Programmed using MicroE SmartSignal Software)
Linear accuracy*
Interpolation accuracy:	Better than 0.12µm over any 20µm movement
Long-travel accuracy:	±1µm accuracy available - consult MicroE Better than ±3µm for scales up to 133mm Better than ±5µm for scales 155mm to 1m Better than ±5µm per meter for scales 1m or more
*Maximum peak to peak error over the specified movement when compared to a NIST-traceable laser interferometer standard, used at room temperature and with MicroE interpolation electronics.
Rotary Accuracy*	Scale O.D	Microradians**	Arc-Seconds**
	12.00mm	±100	±21
	19.05mm	±63	±13
	31.75mm	±38	±7.8
	57.15mm	±19	±3.9
	107.95mm	±10	±2.1
*Based on ideal scale mounting concentricity

Sensor Size

Operating and Electrical Specifications

Power Supply	±5VDC 5% @330mA (30mA for sensor)
Temperature
Operating:	0 to 70°C
Storage:	-20 to 70°C
Humidity:	10 -90% RH non-condensing pending
EMI:	CE Compliance pending
Shock:	1500G 0.5 ms half sine (Sensor)
Sensor Weight:	5.0g (Sensor without cable)
Cable:	Double Shield. Maximum length 2m. Diameter:3.6mm (0.142") Flex Life: 20 x 10 cycles @ 20mm bending radius

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