SERVICE
METERING ROLL SERVICING
The speed reducer gear box.
adjustment as it is completely controlled from the control box.
3. Speed reducer gear box: The |
direct drive gear box provides |
the required speed reduction, |
and transmits power to the me- |
tering rolls through a drive chain |
arrangement. The gear box does |
not require adjustment. The drive |
chain should also be periodically |
lubricated and retensioned as |
necessary. |
4. Unload auger time delay: The |
delay controls the bottom auger |
system and causes the unload |
auger (and any connected aux- |
iliary unloading conveyors) to |
continue operating for the pro- |
This dryer is equipped with SCR metering roll drive assembly. The metering rolls are driven by a separate DC type electric motor. The speed of the motor is vari- able, and is controlled by an electric SCR (silicon controlled rectifier) control within the main control box.
MAIN CONTROLS
1.SCR speed control: The meter- ing roll speed pots on the front of the control box regulate the speed of the DC motor which drives the metering rolls.
The markings on the scale from 0 to 999 represent the flow of grain past the metering rolls as a percent of the maximum grain
discharge rate for the dryer. The maximum setting of 999 provides a maximum 100% discharge of 1960 BPH for 1314, 2520 BPH for 1318, 3080 BPH for 1322 model dryers.
Note: When the control is set to the maximum discharge rate (999), the metering roll speed should be 17.5 RPM for 8" dis- charge auger.
2.DC electric motor: The direct current (DC) motor provides the drive for the metering roll, and is located on the front left hand side of standard model dryers. The output shaft of the motor is connected directly to the gear box assembly.The DC motor requires no operational
grammed amount of time, even |
after the metering rolls stop. |
This feature permits the cleanout |
of grain within the unloading |
equipment at the end of all dis- |
charge cycles. |
5. If a foreign object becomes lodged |
in the metering rolls and jams |
the system, the unloading auger |
will stay in motion. However, |
the metering roll drive will stop |
and the DC motor should stall |
out. The Electronic Monitoring |
Control System will shut down |
the dryer after a two minute |
period. If any one metering roll |
or sensor should malfunction |
the control will display a left or |
right metering roll failure warn- |
ing. |
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