CORNER SYSTEM

General Information

General Information

• Two span lengths available, 268’ (82m) and 287’ (88m)

• Wet weight of 287’ (88m) system is ~10,000lb (4535kg)

General Information (Continue)

• Amp draw of Corner System is ~7.5 amps at 480VAC 60Hz (no Booster Pump)

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• Crop clearance is ~9.5 ft (2.9m) under Corner Tower Frame

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• Corner system comes standard with 16.9 x 24 tires. Will also accept 11.2 x 38 and 18.4 x 26

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• UMC 760 gearboxes used at drive wheels on the Corner

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• 40:1 or 20:1 UMC 1.75 HP Inverter Duty motors used to drive each Tire on Corner

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• UMC 740 gearboxes used for the steering mechanism

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• 60:1 UMC 0.75HP motor used for steering controls

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• 58 total sprinklers on the Corner System

• Sprinklers divided into 15 zones including 1 for End Gun control

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• Bermad 3/4” direct acting valves used to turn each sprinkler ON or OFF using pilot pressure

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• 110VAC solenoid valves used to control the pilot pressure for each system

• Two pilot systems available, water control or air control

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• Water system uses filtered water from the pivot for control

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• Air system uses a three phase air compressor mounted on Corner system. Ideal for dirty water applications

Key Design Considerations

Key Design Considerations

• Corner “Slide” system unique to our design

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• During operation, Corner Tower speed will vary, depending on reading from sensor

• Slide mechanism prevents Corner system from pulling on End Tower during operation, reducing stress

• Software limits in place to prevent Corner from going too far ahead or behind the rest of the system

• Mechanical limit switch also present to break Safety circuit and shut system down if over travel occurs

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• Corner settings can be accessed through a Siemens TD400C Operator Interface

• With the addition of a compass, End gun can also be programmed through the corner Operator Interface

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• Total of 3 Variable Frequency Drives used for Corner system, two on Corner Tower and one on End Tower

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• End Tower is continuous move at speeds above 20%

• End Tower will Start and Stop at speeds below 20% to prevent motor overheating

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• Sprinklers divided into 2 packs, one to maintain head-to-head coverage during extension and retraction

• Secondary pack is the “acceleration” pack used to apply additional water when Corner speed is higher than End Tower speed

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• System will also ‘pulsate’ sprinklers during deceleration to avoid overwatering and maintain uniformity

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• Uses Buried Wire Guidance for control of the Corner position in the field

• Standard output frequency of oscillator is 3kHz

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• Three antennas utilized, a Reference antenna and two Steering antennas

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• Angle of Corner system relative to the Pivot is measured with an analog potentiometer

• Measure wheel angle to determine angle of the Corner for sprinkler control

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• Catwalk for ease of access to controls during set-up and maintenance

Initial Setup

Initial Setup

• Once pivot is setup, run machine WITHOUT corner to establish end tower wheel track

• Three phase contactor included in Hinge Tower box to allow End Tower to be controlled by pivot panel

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• Once end tower wheel track has been established, guidance wire position can be flagged out using the procedure in the manual

• Wire is typically trenched in or Vibra-Shanked in using special equipment for direct burial wire installations

• After installation, check wire using ohmmeter to ensure resistance is between 5 and 50 ohms. Actual resistance will vary depending on length of wire

Initial Setup (Continue)

• With shackles on Slide in vertical position, read analog value of Slide Pot. on screen

• Adjust by rotating pot. shaft until reading is approximately 24,500

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• With the Corner Tower tires in the trailing position running parallel to the span, adjust the Steering Angle reading until it reads approximately 90 degrees

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• To adjust the Steering Angle, simply lift pot. gear off mating gear and rotate by hand until reading is close

• Once close to 90 degrees, use Angle Offset value in Setup screen to make final adjustment

Initial Setup (Continue)

• Leading Safety High

• Leading Safety Low

• Reference Safety

• Trailing Safety High

• Trailing Safety Low

• Dead Band

• Run Point

• Slide Safety High

• Slide Safety Low

• Flush Sand

• Flush Compressor

• Steering ON Time

• Steering OFF Time

Initial Setup (Continue)

• Once Corner is over wire and in position, adjust antennas to read the same value so machine travels in same wheel track in FWD and REV

Important Notes

Important Notes

• Set Supply Voltage and Frequency on all 3 VFD’s using the BOP located in the Hinge Tower Drive box

• P0304 – Motor voltage rating (Default is 460VAC)

• P0310 – Motor frequency rating (Default is 60Hz)

• Set DIP switch on VFD for 50Hz operation

Important Notes (Continue)

Important Notes (Continue)

Important Notes (Continue)

Important Notes (Continue)

• When laying out cable, it is vital that the acceleration of the system be limited using the recommended cable lengths

• Failure to follow this recommendation will result in the Corner being unable to keep up with the rest of the system when the pivot is running at 100%

THANK YOU