ASTEC Peterson 6700B, Руководство по безопасности оператора

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Float Mode
When the feed system starts, the compression roll starts
in float mode. This means that only the weight of the
roll presses down the feed material. However, if the
feed material pushes the roll to the “Max Auto Lift” set-
ting, the hydraulic system will apply down-pressure
onto the feed material.
N
OTE
:
Compression roll “float” mode is not the same as
anvil “float” mode. Anvil float is explained under “IRS Dis-
abled (Float) Mode” on page 24.
Auto Down Pressure Function
The Auto Down Pressure function can be selected on
the control panel. In Auto Down Pressure, the hydraulic
system applies a brief downward pressure pulse to the
compression roll every 6 seconds.
The pressure pulse only occurs below the “Max Auto
Lift” setting. At that point, the hydraulic system will
apply the normal float-mode down-pressure.
Automatic Feed Control
The Peterson Adaptive Control System varies the speed
of the feed system and the height of the compression roll
to keep the engine working at the top of its power curve.
For details, see“Feed System Page” on page 116 and
“Peterson Adaptive Control System” on page 118.
The feed system can also be set to respond to certain
problems. See “Anti-Bridge Page” on page 123 and
“Compression Roll Stall Bump Page” on page 124.
Impact Protection
Important
Large non-grindable objects in the feed material
can cause severe damage. For related information,
see “Impact Release System” on page 23.
Impact Bumpers
Urethane impact bumpers (Figure 17) help prevent
damage to the compression roll housing assembly and
the anvil housing assembly by absorbing impact shocks
when non-grindable objects enter the feed. One bumper
is located above each end of the pivot shaft for the com-
pression roll housing/anvil housing.
Shear Pins and Limit Switch
Shear pins (Figure 17) help protect the machine from
extreme damage. If a large shock over-compresses the
impact bumpers, one or both of the shear pins (one at
each end of the pivot shaft) can break.
Excessive upward movement of the compression roll
housing can trip a limit switch, resulting in an engine
shut-down.
Figure 17: Impact Bumper and Shear Pin
Important
If a shear pin breaks or the limit switch causes the
engine to shut down, lock out the machine, inspect
for damage, and make necessary repairs. Always
replace broken shear pins before resuming opera-
tion.
F05875
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1. Shear Pin
2. Impact Bumper 3. Pivot Shaft, Compression
Roll Housing/Anvil Housing
4. Limit Switch
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