GE IC3645SR4U404N2, IC3645SP4U400N3 Turn Angle Potentiometer Installation, Operation, Setup

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TURN ANGLE POTENTIOMETER INSTALLATION

SX TRANSISTOR CONTROL

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Section 8.0 TURN ANGLE POTENTIOMETER INSTALLATION

Section 8.1 GENERAL:

The potentiometer used for the turn angle must be a 320 degree rotation device that is attached to the steer wheel in a manner to cause a 1:1 rotation ratio between the two devices. Any ohm value potentiometer can be used, but it is suggested that it be at least 2K ohms or above, to keep the wattage of the potentiometer to a minimum. The turn angle potentiometer provides a voltage divider circuit that allows the left and right motor controller to determine the turn angle of the rear steer wheel of the vehicle. The potentiometer is connected to the two controls as show in Figure 1. After the potentiometer is installed on the vehicle, it will need to be adjusted to insure proper operation of the vehicle.

Section of Left Motor

 

 

Section of Right Motor

OPERATION:

Control (Master)

 

 

Control (Slave)

 

P9 P12 P8

 

 

 

P12

To insure proper operation, the input voltage at P12 on both the left and right

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.3V Supply

 

Turn Angle Input

 

 

 

 

 

 

 

 

controls must coincide with the turn angle of the steer wheel. When the steer

 

 

 

 

 

 

 

 

 

wheel is straight ahead ( Zero Degree Turn Angle), the input voltage at each

 

 

 

 

 

 

 

 

 

control should be 2.15 volts. As the vehicle turns left, this input voltage will

 

 

 

 

 

 

 

 

 

decrease, as the vehicle turns right, the input voltage will increase. The graph

 

SupplyNeg

 

 

 

 

 

 

AngleTurn Input

 

 

 

 

 

 

 

in Figure 2 outlines the input voltages, the actions of the controls and the

 

 

320 Degree

 

 

 

 

 

 

 

 

 

 

corresponding turn angles of the steer wheel. A complete listing of input

 

 

 

 

 

 

Potentiometer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltages, steer angles and control actions can be found in Section 8.2 - 320

 

 

 

 

 

 

 

 

 

 

 

Degree Potentiometer Input. As an example of control operation as

 

 

 

 

 

Figure 1

 

 

compared to the input voltage, the following series of events takes place in a

 

 

 

 

 

 

 

left turn from the zero to the 90 degree steer wheel position. In the first 16 o of

travel (2.15 to 1.90 volts), there is

no change to the inside wheel speed. Between 16o (1.90V) and 66o (1.10V), the inside motor will

reduce its speed proportionally from top speed at 16o to creep speed at 66o. There will also be also available two vehicle speed limit enable points during the transition from 16o to 66o. Speed limit 1 can be enabled at 41o and speed limit 2 can be enabled at 60o. Between 66o and 71o, the inside wheel will be in a free wheel mode. As the steer reaches the 71o point, the inside wheel can now be programmed to reverse and accelerate proportionally in the opposite direction. Above 86o is over travel for the turn angle potentiometer.

SETUP:

Before any adjustments are done, jack up the drive wheels.

Install the potentiometer on the vehicle steer wheel in such a way to allow adjustment of the shaft with the potentiometer and connected to both the left and right controls. Setup of the turn angle pot can be done in several ways, detailed below.

Volt Meter Method:

Attach a volt meter, positive to P12 and negative to P8. Insure that the steer wheel is pointing straight ahead (Zero Degree Angle); connect the battery and adjust the potentiometer until the voltage between P12 and P8 is 2.15 volts. Lock down the potentiometer shaft and turn the vehicle all the way to the left turn stop, the voltage should be .93 volts or less. Turn the wheel to the right turn stop, the voltage should be 3.32 volts or greater.

Handset Monitor Mode Method:

Plug the Handset into the left motor controller. Insure that the steer wheel is pointing straight ahead (Zero Degree Angle) and connect the battery. Place the Handset into the monitor routine (Function 25) to view RAM location 95, which is turn angle volts, using the following steps:

1.Push CONT 10

2.Adjust Handset to 95

3.Push STORE

4.Angle Value Displayed

5.ESC to 8888 ( To verify that you have the correct location )

6.Push CONT 10

7.Display should read 95

8.Push STORE

9.Angle Value Displayed

January 2000

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Page 68 Page 70
Contents Installation and Operation Table of Contents 41-45 20-4046-52 57-62Motor Characteristics Basic Operation and FeaturesSolid-State Reversing More Features with Fewer ComponentsFlexible System Application Slows with the increase of current in the field1.c Control Acceleration 1.b Creep Speed2 Current Limit 3.c Pedal Position Plug Braking4.b Speed Limits 6 Steer Pump Contactor Time Delay4.c Proportional Operation for Dual Motor Vehicles 5 Ramp Operation 5a Ramp Start7 On-Board Coil Drivers & Internal Coil Suppression Diagnostics 1 Systems DiagnosticsSystem Protective Override 1 Static Return to Off SRO 2 Accelerator Volts Hold Off4 Battery Discharge Indication BDI 3.a Maintenance Alert & Speed Limit3 Hourmeter Readings 4.a Internal Resistance CompensationBasic Operation and Features Outline DRAWINGS, Elementary Drawings and INPUTS/OUTPUTS Part NumberArgument Outline SX-3 and SR-3 Package Size Drawings and INPUTS/OUTPUTS Section DRAWINGS, Elementary Drawings and INPUTS/OUTPUTS ControlPIN Connections to Main Plug 23 PIN and Y Plug 12 PINDiagnostic Status Codes Medium-Power Signals Level MP High-Level Signals Level H2.d. High Power Signals Level HP Cable Spacing GuidelinesCleaner Reconnect plugs328A1777G1 General Troubleshooting Instructions Traction Control Codes No seat switch or deadman switchTraction Status CodeDescription of Status Cause of Status Indication Reverse directional switch is closed onStart switch fails to close Accelerator depressed with noDirection selected KEY Negative Directional switches are closed at Both the forward and reverseSame time Initial key switch closure Start switch closed on power up afterDischarged battery Motor field current is high on start up Reverse directionForward direction Volts DC Power supply is less than 10 volts Run modeMotor field current is too high during Traction Controller Slave/auxiliary control Open thermal protector TP or Transistor over temperatureLow Motor armature offset voltage is tooArmature transistor did not turn off ProperlyThan 12% of battery volts Armature transistor did not turn onLook Ahead test for A2 volts less Motor field current is too low during Capacitor volts are low before the lineContactor closes Controller motor current sensor Input too low during runningLine driver input P2-17 is less Description Armature transistor limit Armature current exceedsVerify connection between the master control P21 Traction Status Code Symptom TMM Status Codes TemperatureSteer Plug P5 pump is shorted to positive Plug P8 pump is shorted to positive Corrective Actions TROUBLE-SHOOTING Diagram YES Symptom PumpPossible Cause Open thermal protector TP1 or Transistor is over temperaturePump Controller motor current No power to pump motorSensor input is missing Control rangePower Transistor Q1 did not turn on Power Transistor Q1 did notTurn off properly With no pump contactor, controlContactor closes Capacitor volts are low after the lineController motor current Sensor input voltage polarityCheck Voltage at capacitor 1C is less than Volts Battery voltage is less thanTMM7A TMM7A Outline Drawings 3 TMM Pump Control ConnectionsSTART-UP Display Sequence Adjustable FeaturesAccessing Stored Status Codes With GE Handset ActionRemarks Function Function 10 Field Current for Regen Battery volts Set units Battery VoltsInternal Resistance Compensation Function 16 Stall Trip Point with % ON-TIME PushFunction 19 Maintenance Code Tens and Units Hours SET Function 25 MonitorFunction 26 Base Ratio Function 49 Mode 1 Field Weakening Start Push Function 51 Mode 1 MAX Armature % onFunction 28 Stored Status Code Count Pointer Push Function 55 Mode 2 MAX Armature % on Function 52 Mode 2 Armature Controlled AccelerationFunction 57 Mode 3 Field Weakening Start Function 59 Mode 3 MAX Armature % onField Current Summary of Current Limit AdjustmentsFunction Current Limit Function 14 not ApplicableFunction 16 Speed / Torque Compensation Function 48 Mode 1 Controlled Acceleration Push Speed / Torque Compensation Table Voltage SettingFunction 49 Mode 1 Speed Limit 2 SL2 Push Function 50 Mode 1 Speed Limit 3 SL3Function 54 Mode 2 Speed Limit 3 SL3 Function 53 Mode 2 Speed Limit 2 SL2Function 55 not Applicable Function 59 not ApplicableApplication Dash DisplaysStandard Dash Displays ConnectionsOutline Drawings Start-Up Display SequenceTurn Angle Potentiometer Installation SetupOperation Degree Potentiometer for Steer Angle Input Degree Potentiometer Left Right RS-232 Memory MAP Tables Traction ControlRestrictions Function Reset to Zero Only Stored Status Code #6 Reset to Zero Only Stored Status Code #5Reset to Zero Only HoursTens/Ones Reset to Zero Only HoursThou/HunReset to Zero Only Dash Display CA-1 Dash Display FWS-1 Reset to Zero Only Stored Status Code #16None Dash Display Ratio2-1 None
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