Linear and Rotary Encoders

Mercury 3500 Smart Encoder Systems
Rotary Encoder

Programmable Interpolation in Integer Steps to 5 nanometer
Smallest sensor- 1/3 the size of other encoders
Sensor is 8.4mm(H) x 12.7mm(W) x 20.6mm(L) and weighs 1.6g
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 5nm (linear); 67.1M CPR (rotary)
LED set up indicators for sensor alignment and index location
Bi-directional index signal is repeatable to encoder resolution

Specifications

Rotary - 20µm grating pitch

Rotary Glass Scale Diameter	Fundamental Resolution		Interpolation Below is a table of the available resolutions
0.472" [12.00mm]	1650 CPR		x4	x100	x256	x4096
		interpolated resolution (CPR)	6,600	165,000	422,400	6,758,400
		interpolated resolution (arc-sec/count)**	196.4	7.85	3.08	0.192
		interpolated resolution (µrad/count)*	952	38.0	14.86	0.930
		maximum speed* (RPM)	13090	10470	4090	256
0.750" [19.05mm]	2500 CPR		x4	x8	x20	x40
		interpolated resolution (CPR)	10,000	250,000	640,000	10,240,000
		interpolated resolution (arc-sec/count)**	129.6	5.18	2.03	0.127
		interpolated resolution (µrad/count)**	628.3	25.1	9.8	0.614
		maximum speed* (RPM)	8640	6912	2700	169
1.250" [31.75mm]	4096 CPR		x4	x100	x256	x4096
		interpolated resolution (CPR)	16,384	409,600	1,048,576	16,777,216
		interpolated resolution (arc-sec/count)**	79.1	3.16	1.24	0.077
		interpolated resolution (µrad/count)**	383.5	15.3	6.0	0.375
		maximum speed (RPM)	5273	4219	1648	103
2.250" [57.15mm]	8192 CPR		x4	x100	x256	x4096
		interpolated resolution (CPR)	32,768	819,200	2,097,152	33,554,432
		interpolated resolution (arc-sec/count)**	39.6	1.58	0.618	0.039
		interpolated resolution (µrad/count)**	191.7	7.7	3.0	0.187
		maximum speed* (RPM)	2637	2109	824	52
4.250" [107.95mm]	16384 CPR		x4	x100	x256	x4096
		interpolated resolution (CPR)	65,536	1,638,400	4,194,304	67,108,864
		interpolated resolution (arc-sec/count)**	19.78	0.791	0.309	0.0193
		interpolated resolution (µrad/count)**	95.9	3.83	1.5	0.0937
		maximum speed (RPM)	1318	1054	412	26

*Maximum speed produces an encoder quadrature output of up to 28.8 million states per second.
** Resolution values shown are approximate. To calculate exact resolution valules, convert from CPR (Counts Per Revolution) to desired units.
Note: Specifications assume XOR function which is available in all standard controllers.

To calculate desired rotary interpolation multiplier, use the following equation

Interpolation Multiplier = Desired Resolution(CPR)/Fundamental Scale Resolution(CPR)

All Specifications are subject to change. All data is accurate to the best of our knowledge. MicroE Systems is not responsible for errors.

System

Grading Period	20µm
Signal Period	20µm
System Resolution	5µm - 0.005µm 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

W:	12.70mm	0.500"
L:	20.57mm	0.810"
H:	8.38	0.330"

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

Part Numbering System

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