S

PECIFICATIONS

Maximum line count on discMaximum cycles /rev (quad sq waves) Max counts/rev (after quad decode) Internal square wave interpolationInstrument error, arcminutesQuadrature error, electrical degreesInterpolation error, quantaMaximum output frequency, kHz ±±± 1, 21, 3 1, 4 56 1x square waves 2x square waves 5x square waves 10x, 16x square wavesStarting torque, in-oz (N-m) @20CRunning torque, in-oz (N-m) @20iggFCFC °°C 0.07 (5 x 10)

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0.04 (2.9 x 10)

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Moment of inerta, in-oz-s2 (g-cm)Maximum weight, oz (g) Sealin Max. Radial or axial shaft load, lb (N) Bearing life with 0.25 lb radial load Operatin temperature, ° (°) Storage temperature, °(°) Humidity, % rh, non-condensing Shock Vibration

5.7x 10 (0.4)1 (30)IP500.7 (3)

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1 x 10 rev32 to 158 (0 to 70)-22 to 185 (-30 to 85)9830g (300m/s2) 10g (100m/s2)

Notes:

1. Total Optical Encoder Error is the algebraic sum of Instrument Error + Quadrature Error + Interpolation Error . Typically, these error sources sum to a value less than the theoretical maximum. Error is defined at the signal transitions and therefore does not include quantization error, which is ±1/2 quantum. ("Quantum" is the final resolution of the encoder, after user's 4X quadrature decode.) Accuracy is guaranteed at 20°C. 2. Instrument Error is the sum of disc pattern errors, disc eccentricity, bearing runout and other mechanical imperfections within the encoder. This error tends to vary slowly around a revolution. 3. Quadrature Error is the combined effect of phasing and duty cycle tolerances and other variables in the basic analog signals. This error applies to data taken at all four transitions within a cycle; if data are extracted from 1X square waves on a 1X basis (i.e., at only one transition per cycle), this error can be ignored. Error in arcminutes = (60) x (error in electrical degrees) (disc line count) 4. Interpolation Error is present only when the resolution has been electronically increased to more than four data points per optical cycle. It is the sum of all the tolerances in the electronic interpolation circuitry. Error in arcminutes = (21600) x (error in quanta) (counts/rev) 5. The maximum recommended shaft load is based on bearing life considerations. If accuracy is critical, shaft loads should be kept as low as possible.6. Bearing life is based on fatigue failure criteria. In many long-duration applications, lubrication retention becomes the determining factor. As part of our continuing product improvement program, all specifications are subject to change without notice Gurley Precision Instruments514 Fulton StreetTroy, NY 12180 U.S.A.(800) 759-1844, (518) 272-6300, fax (518) 274-0336, Online at www.gurley.com, e-mail: info@gurley.com

R119S/R120B

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