GEIA-274-D-1979-R1988.pdf
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1、4 . -. - . . .- . I. . r 5 - . : . _. . EIA- STAN-DARD- OCK DATA FORMAT . FOR POSITIONING, CONTOURING, AND 4 CONTOURING/POSITIONING I I m NUMERICALLY CONTROLLED MACHINES . (Revision of RS-27.44) FEBRUARY 1979 EL.ECTR.ON.IC - INQUSIRIES -. ASSOCIATION Copyright Government Electronics and use of absol
2、ute or incre- mental dimensions.) Jf perforated tape is used as the input medium, it shd be in accordance with these controls shall be capable of accepting the third interpolation paramter as part of the program data, even if ignored. The “Feed Function” for all motions programmed in 2-dimensional c
3、ircular interpolation shall be programmed directly in inches (millimeters) per mnute or in inches (millimeters) per revolution. The length and range of the “Feed Function shall be designated by the Format DetaiI and Format Classi- fication Sheet. (See Appendix A.) CIRCULAR INTERPOLATION (3-dimension
4、al) Direction of the arc on the surface of a sphere shall be selected by a “Preparatory Function.” For designations, see Appendix B.) :he directinn of the arc CW or CCW is defined a ( it appears when viewed along a line splitting the first octan (see e La, Figure 1) when viewed in the negative direc
5、tion of the three axes. This line has angles = a COS-1 (1/43) with all axes (see Figure 1, A=B=C). When the plane of the defined circle contains this line, the control selects the shorter arc. L +X / t / 0 0 0 FIGURE 1 / I 0- I I / I ,y 0 0 +z “”“”“m Copyright Government Electronics Otherwise Unassi
6、gned M47 (E * 16 Y . Return to Program Start M48 X X Cancel M49 M49 X X Bypass Override M50-M57 * * Ib * Unassigned M58 X X Carice1 M59 M59 X X Bypass CSS Updating . . M60-M89 IE * * * Unassigned M90-M99 0 . * 0 * Reserved for User “The choice of a particdar case must be designated in the Format Cla
7、ssification Sheet. (See Appendix A.) NOTES: 1. Permanently unassigned codes are for individual use and are not intended to be aasigned i n the next 2. For future selection of M codes, the higher number shall initiate the function and the lower number 0 3. Assignments in previous, revision: M12, M46,
8、 M47, M58, M59 Unassigned. revision of the standard. cancel it. Copyright Government Electronics i.e., not an interlock or hold. A mode of interpolation used in contouring to produce a segment of a parabola. Velocities of the axes used to generate this curve are varied by the control. A controlled v
9、elocity increase to programmed rate starting immediately. A controlled velocity decrease to a fixed percent of the programmed rate starting immediately. Used to direct a control to the axis or axes, as speci- fied by the Format Classification, as in a system which time-shared the controls.“ Used to
10、identify the plane for such functions as Circular Interpolation, Cutter Compensation, and others as required. Thread Cutting, Constant Mode selection for machines equipped for thread Lead cutting. Thread Cutting, Increasing Mode selection for machines equipped for thread Lead cutting where a constan
11、tly increasing lead is desired. Threat Cutting, Decreasing Mode selection for machines equipped for thread Lead cutting where a constantly decreasing lead is desired. Copyright Government Electronics 3 G81-G89 Fixed Cicle*+ G90 G9 1 G92 G93 G94 G95 G96 Fixed Cycle Number Code Movement In 1 G81 Feed
12、. 2 G82 Feed 3 G83 Intermittent 4 G84 Spindle Forward Feed 5 G85 Feed 6 G86 Start Spindle, Feed 7 G87 Start Spindle, Feed 8. G88 Start Spindle, Feed 9 G89 Feed Absolute Input Incremental Input Preload of Registers Inverse Time Feedrate Inches (Millimeters) Per Minute Feedrate Inches (Millimeters) Pe
13、r Revolution Constant Surface Speed Per Minute A preset series of operations which direct machine axis movement and/or cause spindle operation to complete such action as boring, drilling, tapping, or combinations thereof. At Bottom Movement Out Dwell Spindle to Feed Start Typical Usage “ “ Rapid Dri
14、ll, Spot Drill “ “ Rapid Deep Hole Yes “ Rapid Drill, Counterbore “ Rev. Feed Tap “ “ Feed Bore “ stop Rapid Bore - stop Manual Bore Yes stop Manual Bore Yes “ Feed Bore A control mode in which the data input is in the form of absolute dimensions. A control mode in which the data input is in the for
15、m of incremental data, Used to preload registers to desired values. No machine operation is initiated. Examples would include preload of axis position registers, spindle speed constraints, initial radius, etc. Information within this block shall conform to the character assignments of Table 1. The d
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