MIL-M-80269
The control shall
and humidity ranging from 5 to 95 percent noncondensing.
automatically shut down when internal operating temperature exceeds safe
Control resolution shall be no greater than 0.0001
operating temperature.
for each linear axis and not more than 0.001 of a degree for each rotary
axis. When binary cutter location (BCL) data is specified (see 6.2.1), the
numerical control shall have the necessary software to perform all geometry
dependent functions which are ordinarily performed by the postprocessor.
MCU.
The MCU shall provide full contouring control of the
3.4. 10.1
machine's three linear axes for performing drilling, tapping, boring, ream-
ing, and contour milling operations by simultaneous movement of each axis.
3.4.10.2 Data input.
Punched tape data input.
Unless otherwise specified (see
3.4.10.2.1
6.2.1), the input media for the control shall be l-inch, eight-channel
The data input format and codes shall comply with EIA
punched tape.
Standards RS-274 and RS-358 or, when specified (see 6.2.1), RS-244 in lieu
of RS-358. The control shall be equipped with a photoelectric tape reader
capable of holding, feeding and reading tape prepared in the format
Unless
specified at a rate not less than 150 characters per second.
otherwise specified (see 6.2.1), the tape reader shall be supplied with
The tape reader
standard feed and take-up spools 5-1/4 inches in diameter.
shall be housed in a dust free area of the numerical control cabinet and
The control
shall be easily accessible for cleaning and tape handling.
shall have a tape error detection capability to continuously check for the
fol. owing errors:
l
Odd parity per EIA RS-244.
a.
Even parity per EIA RS-358.
b.
Misaligned sprocket holes.
c.
No sprocket holes.
d.
Any of the above errors shall halt machine functions and illuminate an error
light or a message on the data display screen to indicate a fault condi-
t ion.
3.4.1O.2.2 Flexible diskette data input. When 32 Bit Binary Cutter Loca-
tion (BCL) Exchange Input for Numerically Controlled Machine is specified
(see 6.2.1), the input media shall be an 8-inch flexible diskette recorded
The input data format shall comply with
in accordance with 3.4.10.2,2.1.
EIA Standard RS-494.
Functions 10.1, 10.2 and 10.3 of section 10, EIA
RS-494 shall apply.
Manufacturers providing functions or features that
cannot be addressed by command codes currently covered by EIA RS-494 shall
apply to the Electronic Industries Association, IE-31 Committee on Numerical
Control Systems and Equipment for an extension of the standard codes to
cover the new features or functions. The control shall be equipped with an
8-inch flexible diskette reader.
The reader shall have the capability to
perform a cyclic redundancy check of the input data and be capable for
reading not less than 15,000 characters per second.
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