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| Illustration 1 | g00673552 |
Location of IQANtalk connection and IQAN modules (1) IQANtalk connection. (2) IQAN modules (IQAN-MG and IQAN-XP). | |
The IQANtalk connection is a nine pin connector that is located behind the rear access panel in the cab. Two IQAN modules (IQAN-MG and IQAN-XP) are located behind the rear access panel in the cab.
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| Illustration 2 | g00673736 |
Location of IQAN module (IQAN-XS) | |
The IQAN module (IQAN-XS) is located behind the operator seat in the cab.
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| Illustration 3 | g00673753 |
Location of IQAN module (IQAN-DG) | |
The IQAN module (IQAN-DG) is located on the right rear console in the cab.
The IQAN-DG allows individual functions of the machine to be monitored and adjusted.
The IQAN receives electrical signals from the sensors, the switches, the potentiometers, the accelerator pedals, and the joysticks. The IQAN processes the electrical input signals. The IQAN then outputs the signals to the solenoids, the warning system, and the monitoring system.
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| Illustration 4 | g00662482 |
Diagram of the Monitoring and Control System (1) IQANtalk connection (3) Warning alarm (4) Warning lamp (5) Proportional solenoids for swing cylinders (6) Proportional solenoids for boom cylinder (7) Proportional solenoids for stick cylinder (8) Proportional solenoids for rotator (9) Proportional solenoids for grapple cylinder (10) Proportional solenoids for extendable stick cylinder (11) On/off solenoid for left bogie float valve (12) On/off solenoid for right bogie float valve (13) Proportional solenoid for steering cylinder (left turn) (14) Proportional solenoid for steering cylinder (right turn) (15) Proportional solenoids for left bogie cylinder (16) Proportional solenoids for right bogie cylinder (17) On/off solenoids for gate vertical cylinders (18) On/off solenoid for diverter valve (19) On/off solenoid for oscillation lock valve (20) Proportional solenoids for boom tilt and gate (21) Boom activation lamp (22) Activation lamp (toggle switch steering) (23) Boom tilt switch (24) Operating mode switch (25) Oscillation lock switch (26) Left bogie float switch (27) Right bogie float switch (28) Left implement hydraulics joystick (29) Right implement hydraulics joystick (30) Left bogie joystick control (31) Right bogie joystick control (32) Toggle switch steering (33) Hydraulic oil temperature sensor (34) Pressure sensor (return filter) (35) Hydraulic oil level switch (36) Activation switch (toggle switch steering) (37) Gate vertical switch (38) Gate horizontal switch (39) Accelerator pedals (40) Seat direction switch (41) Door switch (42) Terrain toggle switch steering | |
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| Illustration 5 | g00682493 |
Location of Switches for Hydraulic System (4) Warning lamp (21) Boom activation lamp (22) Activation lamp (toggle switch steering) (23) Boom tilt switch (24) Operating mode switch (25) Oscillation lock switch (26) Left bogie float switch (27) Right bogie float switch (28) Left implement hydraulics joystick (29) Right implement hydraulics joystick (30) Left bogie joystick control (31) Right bogie joystick control (32) Toggle switch steering (36) Activation switch (toggle switch steering) (37) Gate vertical switch (38) Gate horizontal switch (39) Accelerator pedals (40) Seat direction switch (41) Door switch (42) Terrain toggle switch steering | |
On/Off Switches
Whenever the operator presses a switch, a constant current flows to one of the IQAN modules. The current can be as low as 0.3 mA or even lower. The voltage signal will be 0 to 24 volts.
Operating mode switch (24) and door switch (41) control the flow of electricity to solenoids. When the door is open, no electrical functions on the machine will operate. When the operating mode switch is not depressed, the boom and the stick for the loader and the grapple will not operate.
Oscillation lock switch (25) controls the flow of current to on/off solenoid (19). The switch is a momentary switch. When the switch is depressed, the oscillation lock cylinder prevents the machine from oscillating. When the machine stops, the oscillation lock valve is locked automatically.
Bogie float switches (26) and (27) control solenoids (11) and (12) in the bogie float valves. When the switches are in the ON position, oil from the head ends and the rod ends of the bogie cylinders flows to the tank. The bogies can then follow the contour of the ground.
The gate is controlled by switches (37) and (38). The gate vertical switch controls the solenoid in the combination valve. When the gate horizontal switch is pressed, solenoid (18) shifts and solenoid (20) allows the gate to move.
Activation switch (36) controls the flow of current to steering solenoids (13) and (14). When activation switch (36) is in the OFF position, only the steering wheel can be used to articulate the machine.
Proportional Controls
Controls (23), (28), (29), (30), (31), (32), and (42) allow the hydraulic functions to be controlled proportionally. A graph of the current from a joystick control is shown in Illustration 6.
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| Illustration 6 | g00814979 |
Relationship of the Joystick Movement and the IQAN Output Current to the Solenoid (43) "25%" fine control. (44) "50%" fine control. (45) "75%" fine control. (46) "100%" fine control. (A) Maximum current. (B) Minimum current. (C) Incorrect current adjustment. (D) Joystick at START position. (E) Joystick at end of travel. | |
Note: The operation of the joysticks and the toggle switches is similar. An explanation of a joystick control is given.
When the joystick is in the NEUTRAL position no current will flow from the control. If you move the joystick slightly from the NEUTRAL position the "minimum current" (B) will flow from the control. The IQAN will start to send current to the solenoid.
The minimum current should be adjusted so that the function slowly moves during the first flow of current from the lever. If the minimum current is too high, the function will jump when you move the lever. If the minimum current is too low, the control lever must be moved excessively in order to begin movement of the function.
As the joystick moves further from the NEUTRAL position, the resistance in the circuit changes. This changes the voltage that is sent to the IQAN. At the LEFT position, the voltage is approximately 0.5 Volts. At the RIGHT position, the voltage is approximately 4.5 Volts. At the NEUTRAL position, the voltage is approximately 2.5 Volts.
The magnitude of the voltage from the joysticks controls the current from the IQAN to the proportional solenoids in the implement control valve.
The magnitude of the current to the proportional solenoids controls the amount of movement of the solenoids. The movement of the solenoids controls the flow of oil to the cylinders.
As you continue to move the joystick control, the hydraulic component will respond to the joystick movement according to the setting of the "fine control". The "fine control" relates the speed of the function to the travel distance of the joystick control.
When the value for fine control is set to zero the speed of the function increases proportionally to the movement of the lever. As the value of the "fine control" is increased, the travel distance of the lever will increase in order to initially increase the speed of the function.
When the joystick control reaches the end of travel, the "maximum voltage" will flow from the joystick control. This will allow the IQAN to send the maximum current to the solenoid. The "maximum current" should be adjusted so that you have control of the function. If the maximum current is set too high, the maximum speed will be reached before the full travel distance of the joystick is reached. The function may be uncomfortable to control, if maximum current is set too high. If the maximum current is set too low the function will not move at maximum speed.
The "ramp control" controls the response of the function after the control lever is released from a fully activated position. As the value of the ramp control decreases, the functions will stop sooner. The value should be adjusted as high as possible without losing productivity or control of the function. A graph of the "ramp control" is shown in Illustration 7.
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| Illustration 7 | g00815166 |
"Ramp Control" (47) "20%" control. (48) "50%" control. (49) "100%" control. (F) Movement. (G) Joystick released. (H) "0%" control. (J) Time. | |
Proportional Solenoids
Proportional solenoids (5), (6), (7), (8), (9), (10), (13), (14), and (20) in the implement control valve control the flow of pilot oil to valve spools. Proportional solenoids (15) and (16) in the bogie control valve control the flow of pilot oil to valve spools. When a function is activated, the IQAN sends current to the solenoids. The amount of current controls the amount of pilot oil that will flow to the valve spool.
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| Illustration 8 | g00815343 |
Current to the Proportional Solenoids (K) Maximum current. (L) Minimum current. (M) Zero current. | |
The current that flows from the IQAN to the proportional solenoids is similar to a sine wave. The sine wave allows the solenoid to vibrate in position. The vibration prevents the solenoid from sticking in a position.
As a joystick control is moved from the NEUTRAL position, the current to the proportional solenoids increases from zero (M) to the minimum current (L). As the joystick is moved further, the current to the solenoid is increased. The frequency and amplitude of the sine wave remains constant. The solenoid vibrates in the new position.
As the joystick control reaches the maximum travel, the current reaches the maximum adjusted current to the solenoid.
Monitoring System
IQANtalk is the interface between the IQAN and the user. IQANtalk is intended for controlling, supervising, and troubleshooting the IQAN system. The IQANtalk software allows you to measure the electrical input signals and the electrical output signals of the IQAN.
The IQANtalk software allows you to download the machine settings that are specific to the machine. The IQANtalk also allows you to load new software to the IQAN. This software contains the parameters of the machine systems.
The IQANtalk software also allows you to download settings from the IQAN for troubleshooting. IQANtalk allows you to monitor multiple functions simultaneously.
A PC with IQANtalk can be hooked up to the IQAN at connection (1) .
The software can be used to change the following parameters for the hydraulic system:
- Warning level for the hydraulic oil level
- Warning temperature for the hydraulic oil temperature
- Current to the solenoids
The IQAN uses hydraulic oil temperature sensor (33), hydraulic oil level switch (35), and pressure sensor (34) to detect problems in the hydraulic system. Also, the inputs and outputs from the joystick control are monitored. If a problem is detected, a warning lamp and a warning alarm alerts the operator. The alarm will also be shown on the display screen.
The hydraulic oil temperature sensor is attached to the bottom of the hydraulic oil tank. The hydraulic oil level switch is attached to the top of the hydraulic oil tank. The pressure sensor for the return filter is attached to the manifold on top of the hydraulic oil tank.