TM 5-3895-383-24
Illustration 61
Control Console
(1) Vibratory on/off control switch. (2) Vibratory amplitude
control. (3) Variable vibration control knob.
6.
Turn variable vibration control knob (3) to the full
counterclockwise position.
7.
Depress vibratory on/off control switch (1) in order to
start the vibratory system. Read the vibrations per
minute (VPM) from optional VPM gauge or read the
VPM from the 133-0963 Vibration Tachometer or the
133-9905 Frequency Meter. The minimum frequency
for high amplitude should be 1400 ± 50 VPM.
Illustration 62
Control Console
(8) Variable frequency controller.
Illustration 63
Variable Frequency Controller
(8) Variable frequency controller. (9) "P5" Low amplitude-
minimum frequency potentiometer. (10) "P6" High amplitude-
minimum frequency potentiometer. (11) "P3” Low amplitude-
maximum frequency potentiometer. (12) "P4” High amplitude-
maximum frequency potentiometer.
8.
Depress the vibratory on/off control switch in order to
shut off the vibratory system.
NOTE:
Refer to Testing and Adjusting, "Vibratory
Tachometer - Adjust" if the vibration tachometer
is installed and the minimum frequency for high
amplitude appears incorrect. This adjustment
procedure should be followed before making any
machine adjustments.
NOTE:
Adjustment of the vibratory frequency is done
through the adjustment of potentiometers which
are found by removing the panel on the side of
the control console. The potentiometer are
located on the variable frequency controller. The
adjustment of the potentiometers is done with a
small screwdriver.
NOTE:
Turning
the
potentiometers
clockwise
will
increase the frequency.
NOTE:
If the frequency has not shown any variation after
rotating the potentiometers for two full turns, refer
to the Troubleshooting section.
9.
If the minimum frequency for high amplitude is not at
1400
±
50
VPM,
"P6"
high
amplitude-minimum
frequency potentiometer (10) must be adjusted. After
adjusting
"P6"
high
amplitude-minimum
frequency
potentiometer (10), verify that the minimum frequency
for high amplitude is correct.
11-56
