1、MIL-E-85082A 16 November 1992 SUPERSEDING MIL-E-85082(AS) 27 September 1977 ENCODERS, SHAFT ANGLE TO DIGITAL, GENERAL SPECIFICATION FOR This military standard is approved for use by all Departments and Agencies of the Department of Defense. 1 e 1. SCOPE a 1.1 ScoDe. This specification covers the req
2、uirements for all types of analog shaft angle input to digital output encoders. It is not complete in itself, but should be used in conjunction with MIL-S-81963 which will form an integral part of this specification. 1.2 Classification. 1.2.1 Nomenclature. The nomenclature consists of the item name,
3、 followed by a type designation which includes a modification letter and a part identifying number. All encoders having the same design nomenclature are physically, mechanically and electrically interchangeable for all military applications. The type designation is indicated by digits and - letters
4、which indicate in code form the principal physical and electrical characteristics affecting interchangeability (see Table I). Throughout the designation, a “W“ will indicate a special case to be defined by the applicable specification sheet. 1.2.1.1 Item name. In all cases, the item name will be “En
5、coder, Shaft Angle to Digital“. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to Commanding Officer, Naval Air Warfare Center Aircraft Division, Code SR3, Lakehurst, NJ 08733-5100 by using the sel
6、f-addressed Standardization Document Improvement Proposal (DD FORM 1426) awearinq at the end of this document or by letter. MSC - N/A FSC 5990 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. , Provided by IHSNot for ResaleNo reproduction or networking permitted with
7、out license from IHS-,-,-MIL-E-85082A 9999906 1632122 911 W MIL-E-85082A 1.2.1.2 Size. The first two digits of the type designat-m wil indicate the maximum diameter of the encoder in tenths of an inch. If the maximum diameter is not a whole number of tenths, the next higher tenth will be used. 1.2.1
8、.3 TVRe. The type, or operating principle employed, will be designated by a single letter according to the following schedule: L S W Capacitive C Optical (Lamp) - - K Optical (LED) - Contact Eddy Current - E Magnetic - Other - M 1.2.1.4 Code and scan. The output code and scanning method will be desi
9、gnated by a single letter according to the following schedule: Natural Binary, Line-Scan Natural Binary, U-Scan Natural Binary, V-Scan Natural Binary, M-Scan Reflected (Cyclic) Binary (Gray Code) Reflected (Cyclic) Binary (Gray Code) Binary Coded Decimal, Line-Scan Binary Coded Decimal, U-Scan Binar
10、y Coded Decimal, V-Scan Binary Coded Decimal, M-Scan Decimal, Line-Scan Incremental (With Zero Reference) Incremental (Without Zero Reference) Altitude reporting (ICAO) Other A B C N D P E F G M H J K U W 1.2.1.5 Readout. Whether the sensor selection is accomplished internally or externally, and whe
11、ther the readout is parallel or serial will be designated by a letter according to the following schedule: External Logic, Parallel External Logic, Serial Internal Logic, Parallel Internal Logic, Serial J K L M 1.2.1.6 Capacity. The capacity of the encoder, with reference to the code, will be design
12、ated by a two-digit number equal to the highest power of two or ten, contained in the total count. If the number is less than 10, it should be preceded by a zero. closest power of two. instead of exponentially. avoid confusion. Incremental will be listed as the The resolution will occasionally be li
13、sted directly Consult the applicable specification sheet to 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-9 . 1.2.1.8 Resolution. The resolution of the encoder will be designated by a number equal to the highest power of two or ten, with referenc
14、e to the code, counted by one revolution of the input shaft. If the number is Less than 10, it should be preceded by a zero. Incremental units will be listed as the nearest power of two. directly instead of exponentially. sheet to avoid confusion. The resolution will occasionally be listed Consult t
15、he applicable specification 1.2.1.9 Desisn modification. The upper case letter nA“ following the resolution designation indicates the original or basic issue of an encoder type. designated by succeeding letters in the alphabet, with the exception of 111“ , “L“ , “O“ subsequent modifications which af
16、fect interchangeability are , and “Q“r which are prohibited. 1.2.1.10 Input voltacre. The input voltage required for proper operation will be specified on the applicable specification sheet. 1.3 Illustration. An encoder bearing the type designation 18KCJ13R07BI illustrated in Table I, has the follow
17、ing characteristics: Size - Diameter greater than 1.7 but (18) not more than 1.8 inches Code and Scan - Natural Binary; V-Scan (Cl Readout Capacity - External Logic; Parallel (J) 2 counts (13) 13 - MIL-E-85082A 1.2.1.7 Function. The digital output of the encoder is a mathematical function of the sha
18、ft position. This function will be designated by a letter according to the following: Linear Sine-Cosine Tangent Exponent ia1 Logarithmic Other Linear (RI Function - 7 Bit (07) Resolution - Modification - First Modification (BI 3 Provided by IHSNot for ResaleNo reproduction or networking permitted w
19、ithout license from IHS-,-,-MIL-E-85082A 1.4 Part identifvinu number (PIN). The part identifying number consists of the letter “M“, the basic number of the specification sheet (not including the revision letter), an assigned dash number and a suffix letter designating the latest modification letter
20、in the type designation, as shown in Table II. 2. APPLICABLE DOCUWENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. e in the issue of the Department of Defense Index of Speci
21、fications and Standards (DODISS) and supplement thereto, cited in the solicitation (see * Unlese otherwise specified, the issues of these documents are those listed 6.2). SPECIFICATIONS MILITARY MIL-(2-5541 - MIL-W-16878/4 - MIL-C-19500 MIL-M-38510 MIL-B-81744 MIL-B-81793 MIL-L-81846 MIL-S-81963 Che
22、mical Conversion Coatings of Aluminum and Aluminum Alloys Wire, Electrical, Polytetrafluoroethylene (PTFE), Insulated, 2OO0C, 600 Volts, Extruded Insulation Semiconductor Device, General Specification for Microcircuit, General Specification for Barrier Coating Solution, Lubricant Migration Deterring
23、 Bearing, Ball, Precision, for Instruments and Rotating Components Lubricating Oil, Instrument, Ball Bearings, High Flash Point Servocomponents, Precision Instrument, Rotation, Common Requirements and Tests 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
24、HS-,-,-. i I_ _ _ flIL-E-85082A 9999906 3632325 620 MIL-E-85082A STANDARDS MILITARY MIL-STD-105 MIL-STD-198 MIL-STD-199 MIL-STD-202 MIL-STD-810 MIL-STD-883 MIL-STD-1334 (Unless otherwise specified, Sampling Procedures and Tables for Inspection by Attributes Capacitor, Selection and Use of Resistor,
25、Selection and Use of Test Methods for Electronic and Electrical Components Environmental Test Methods Test Methods and Procedures for Microelectronics Process for Barrier Coating of Anti-Friction Bearings copies of federal and military specifications, standards and handbooks are available from the S
26、tandardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. 2.2 Order of Drecedence. In the event of a conflict between the text of this document and the references cited herein, (except for associated detailed specifications, specification sheets or MS standards)
27、, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein, in MIL-S-81963, and in a
28、ccordance with the applicable specification sheets. In the event of any conflict between requirements of MIL-S-81963, this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Encoders furnished under this specification shall be products which are authorized by the
29、qualifying activity for listing on the applicable qualified products list at the time set for opening of bids (see 4.4 and 6.4). 3.3 First article. When specified in the contract or purchase order (see 6.2), a sample shall be subjected to first article inspection (see 4.5). 5 Provided by IHSNot for
30、ResaleNo reproduction or networking permitted without license from IHS-,-,- - . NIL-E-BSOBA 9999906 1632126 567 m MIL-E-85082A 3.4 Desian and construction. Encoders shall be of the design, construction and physical dimensions specified (see 3.1). 3.4.1 Physical characteristics. The physical characte
31、ristics of the encoder shall be as specified in the applicable specification sheet. In addition, the encoder shall be designed and constructed to perform with no reduction in accuracy, repeatability, or service life requirements after undergoing the environmental conditions of 4.8. 3.4.2 Termination
32、 identification. When screw and solder pin terminals are designated, the terminals shall conform to the specifications of MIL-S-81963. Unless otherwise specified on the applicable specification sheet, the wire for wire leads shall be in accordance with MIL-W-1687814, E-26, and shall be a minimum of
33、18 inches long. Wire leads shall be capable of being pulled, bent, and twisted as required in MIL-S-81963. Terminal and lead wire identification marking for terminal screw, solder pin, or wire lead type shall be in accordance with the applicable specification sheet. 3.4.3 Direction of shaft rotation
34、. Unless otherwise specified on the applicable specification sheet, counterclockwise rotation of the shaft shall produce an increasing count. The standard (positive) direction of rotation of the shaft is counterclockwise when the encoder is viewed from the shaft extension end. 3.4.4 Stops. The encod
35、er shall contain no mechanical stops. The input shaft shall be capable of continuous rotation in either direction. 3.45 Dimensions. Outline drawings for the standard encoder sizes are included on Figures 1 through 5. Lettered dimensions shown on the outline drawings are provided in Table III. 3.4.6
36、Operatinq speed. The operating speed of encoders shall be as specified in the applicable specification sheet. 3.4.7 Operatina life. The operating life of encoders furnished under this specification shall be a8 specified in the applicable specification sheet. 3.4.8 External power Supply. Power to the
37、 electronics portion of an encoder may, if necessary, be supplied by an external power supply as specified in 3.4.8.1 and 3.4.8.2. considered as part of the encoder and must meet all environmental requirements of the encoder. If no external power supply is required for operation of the encoder, the
38、encoder shall operate with equivalent input voltages. This external power supply shall be 3.4.8.1 External power sumzdv confiauration. The configuration of the external power supply, if used, shall be as specified in Figure 6. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
39、thout license from IHS-,-,-MIL-E-85082A 3.4.8.2 Input Dower remiremente. The power supply input voltages shall meet the requirements of the applicable specification sheet. 3.4.9 Electrical characteristics. The electrical characteristics of the encoder shall be as specified in the applicable specific
40、ation sheet. 3.4.10 Diode isolation icontact type). Isolation diodes shall be provided as an integral part of the encoder package. drop across each isolation diode shall not exceed 1 volt. The isolation diodes shall be wired to prevent the flow of current if the high side of a DC voltage source is c
41、onnected to the encoder common lead and the low side is connected to any other encoder lead. The maximum voltage . 3.5 Parts. materials and Drocesses. Whenever possible, encoders shall be constructed from parts and materials in accordance with MIL-S-81963. 3.5.1 Commercial Darts. Commercial parts ha
42、ving equivalent properties to military parts may be used when, on the date of invitation for bids, there are no suitable military standard parts. Commercial hardware such as nuts, bolts, and washers having suitable properties may be used, provided they can be replaced by military standard parts with
43、out alteration to parts or equipment. 3.5.2 Bearings. Corrosion-resisting ball bearings ABEC Class 5 or better, of the radial thrust type, shall be used in the construction of encoders (except that higher precision bearings shall be used in applications where bearing runout will cause a shift of one
44、-half count or greater on the least significant digit). This latter requirement shall be the maximum permissible bearing error. Bearings shall meet the requirements of MIL-B-81793. 3.5.3 Lubricants. All bearings used in the fabrication of encoders shall be processed and barrier coated in accordance
45、with MIL-STD-1334, using the barrier coating solution of MIL-B-81744. lubricated with the lubricant specified in MIL-L-81846. The bearings shall be 3.5.4 Metals. Metals shall conform to the requirements of MIL-S-81963. 3.5.4.1 Rotor shaft and housinq. Rotor shaft and housing shall meet the requireme
46、nts of MIL-S-81963. , 3.5.4.2 Electrical contacts. Under storage and use environments, electrical contact surfaces shall not form chemical combinations resulting in films of higher electrical resistivity than the parent material. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted
47、 without license from IHS-,-,-MIL-E-85082A m 9999906 3632328 33T m MIL-E-85082A 3.5.4.3 Aluminum. Where practicable, aluminum alloy parts shall be anodized in accordance with MIL-S-81963. Aluminum alloys which do not anodize satisfactorily shall be coated with a chemical film in accordance with MIL-
48、C-5541. 3.6 Electronic components. 3.6.1 Resistors. All discrete resistors used in the fabrication of encoders shall be selected from MIL-STD-199. 3.6.2 Capacitors. All discrete capacitors used in the fabrication of encoders shall be selected from MIL-STD-198. 3.6.3 Semi-conductors. Silicon semicond
49、uctors conforming to MIL-S-19500 JAN TX shall be used throughout an encoder requiring semiconductor devices. The reverse bias impedance of isolating diodes, when used, shall not be less than one megohm throughout the range of operating temperatures. 3.6.4 Inteqrated circuits. All integrated circuits used in the fabrication of encoders shall conform to MIL-M-38510 Class B and MIL-STD-883 Class B. 3.6.5 Hybrid electronic packaues. All h
