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Page Title:
Operating knobs and slip scales. |
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| MIL-M-45690A(MU)
and maintenance of test equipment shall be
should also be made to determine any exces-
sive looseness or improper function of knobs,
in accordance with "Inspection Equipment,"
scales, locking levers, etc. Anyone of the
and "Government Furnished Material" re-
possible defects defined above shall be cause
quirements of Specification MIL-1-45208.
to consider a unit mount as defective.
4.4.2 Contractor furnished inspection
Mounts which have passed the above exami-
equipment.
nations shall be tested for all the require-
4.4.2.1 GOVERNment design. All inspection
ments of this specification.
equipment required by drawings forming a
4.5.2 Temperature. The mount shall be
part of the contract and not provided by the
placed in a test chamber that is capable of
Government shall be supplied by the contrac-
maintaining the temperatures as specified in
tor in accordance with the List of Inspection
3.4.2 until thermal equilibrium is reached,
Equipment Numbers, IEP8574690. Alter-
While at these temperatures the mount shall
nate designs may be substituted only as
be subjected to the tests of 4.5.3. After re-
provided by "Inspection Provisions" of Speci-
moving the mount from the test chamber a
fication MIL-I-45208.
visual-tactile test as described in 4.5.1.1 shall
4.4.2.2 Contractor design, The contractor
be made to ascertain that materials and
shall design and supply inspection equipment
workmanship were not damaged by the ex-
compatible with the "Test Methods and Pro-
treme temperatures.
cedures" specified in 4.5, and with the "Com-
4.5.3 Operating knobs and slip scales. The
ponent Inspection" requirements of Specifi-
elevation and deflection knobs shall be
cation MIL-F-18926. Concept, construction,
checked at both the extreme temperatures
materials, dimensions, and tolerances used in
and at room temperature to the torque values
design of test equipment shall be so selected
specified in 3.4.2.1 using the adapters and
and controlled as to insure that the test
torque wrench as specified in the operating
equipment will pertnit positive rejection of a
instructions on Drawing F8636560. A tactile
product which exceeds the prescribed toler-
examination of the slip scales shall be made
ance limit, and will reliably indicate accepta-
at the extreme temperatures while perform-
bility of a product which does not exceed 90 %
ing the above check on the operating knobs.
of the prescribed tolerance limit. Construc-
Subsequent to these checks, the mount shall
tion shall be such as to facilitate routine
be examined as defined in 4,5.2.
calibration of the equipment,
4.5.4 Alinement. Alinement shall be in
4.5 Test methods and procedures.
accordance with the "set-up instructions" on
Drawing F8636560 and the requirements of
4.5.1 vibration. Vibration shall be in ac-
3.5,1 to perform the following tests.
cordance with the Set-up and Operating in-
4.5.5 Movement. This test shall be per-
structions on Vibration Fixture Drawing
formed using Final Inspection Fixture
F8636537 and the Requirements of 3.4.1. The
F8636660 and in accordance with the operat-
use of a simulated telescope as shown on
ing instructions therein. Azimuth and eleva-
Drawing F8636549 shall be used in this test.
tion knob movement shall be as specified in
4.5.1.1 Post vibration. Subsequent to vi-
3.5.2.
bration the mount shall be thorougly ex-
4.5.6 Backlash. The test maybe performed
amined for physical defects resulting from
in conjunction with 4.5.5 and the operating
poor workmanship and materials, prior to
instructions of Drawing F8636560. Backlash
being subjected to the remaining perform-
in elevation or azimuth movement shall not
ance tests. Minimum visual examination shall
exceed the requirements of 3.5.2.1.
include the housing, knobs, locking levers,
scales, screws, etc. A tactile examination
4.5.7 Boresight locks. Apply the load as
4
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