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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Specifications | See Note | 9125 | 9225 | 9425 | | | | Maximum line count on disc | 6 | 9,000 | 9,000 | | | | Max cycles/rev with internal electronics | | 9,000 | 50,000 | | | | Max counts/rev after quad edge detect | | 36,000 | 200,000 | | | | Instrument error, ± arcsec | 1,2 | 45 | 20 | 10 | | | | Quadrature error, ± electrical degrees | 1,3 | 30 | 24 | 15 | | | | Interpolation error, ± quanta | 1,4 | N/A | 0.10 | | | | Maximum output frequency, kHz | | | | | | 1X square waves, data only | | 500 | 100 | | | | 1X square waves, data + index | | 250 | 100 | | | | 2X square waves, data + index | | N/A | 150 | | | | 5X square waves, data + index | | N/A | 300 | | | | 10X square waves, data + index | | N/A | 500 | | | | Maximum weight, oz (g) | | 20 (565) | | | | Starting torque, in-oz (N-m) @20°C | 5 | 2.0 (14.0 x 10-3) | | | | Running torque, in-oz (N-m) @20°C | 5 | 1.0 (7.0 x 10-3) | | | | Moment of inertia, in-oz-s2 (g-cm2) | | 9.0 x 10-4 (63.2) | | | | Maximum acceleration, rad/s2 | | 2 x 106 | | | | Operating temperature, °F (°C) | | 32 to 158 (0 to 70) | 32 to 122 (0 to 50) | | | | Storage temperature, °F (°C) | | -4 to 176 (-20 to 80) | | | | Humidity, % RH, non-condensing | | 98 | | | | Shock | | 50g, 11ms | | | | Sealing | | IP65, except IP64 at shaft exit | | | | Bearings | | Grease-lubricated and sealed | | | | Maximum radial shaft load, lb (N) | 5 | 30 (133) | | | | Bearing life (with 10-lb radial load) | | 1.4 x 10 rev | | | | | | | | | | | | | | | | | | | | | | | | 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 run-out 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 arcseconds = (3600) 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 arcseconds = (1296000) x (error in quanta) / (counts/rev) 5. If reduced torque or higher load capacity is required, consult factory. 6. With line counts > 6000, operating temperature range is 32°F to 122°F (0°C to 50°C). | | | | | | | | | | As part of our continuing product improvement program, all specifications are subject to change without notice. | | | | | | | | | | Gurley Precision Instruments 514 Fulton Street Troy, 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 | | | | | | 9X2 5 Page 2 of 6 VD922D4 | | | | | | | | | | | | | | | | | | | | | | | | | | |
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