Wiring Limit Switches Without Encoders | RoboteQ AX2850 guide

Wiring Limit Switches Without Encoders

Wiring Limit Switches Without Encoders

If no encoder is used, the Encoder Module’s inputs can be used to wire limit switches directly with solely a pull-up resistor as shown in the diagram below.

5V Out

4.7kOhm

4.7kOhm

4.7kOhm

4.7kOhm

Ch B In

Ch A In

Ch B In

Ch A In

8 - 4

5

6

1Encoder Input

SW1

SW2

SW3

SW4

GND

7 - 3

FIGURE 51. Signals seen by encoder using multi-levels and limit switches

Effect of Limit Switches

Each pair of limit switches will stop the motion of a given motor in a given direction. This will have the effect of stopping the motor when a limit is reached while allowing motion in the other direction, away for that limit.

TABLE 15. Effects of Limit Switches 1 and 2 on Motor 1

SW1	SW2	Motor 1 Fwd	Motor 1 Rev
OFF	OFF	Allowed	Allowed

ON	OFF	Stopped	Allowed

OFF	ON	Allowed	Stopped

ON	ON	Stopped	Stopped

TABLE 16. Effects of Limit Switches 3 and 4 on Motor 2

SW3	SW4	Motor 2 Fwd	Motor 2 Rev
OFF	OFF	Allowed	Allowed

ON	OFF	Stopped	Allowed

AX2550 Motor Controller User’s Manual

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Image 79

RoboteQ AX2850 user manual Wiring Limit Switches Without Encoders, Effect of Limit Switches, Motor 1 Fwd Motor 1 Rev

Contents

AX2550 AX2850 Dual Channel High Power Digital Motor Controller AX2550 Motor Controller User’s Manual Revision History Revision HistoryDate Version Changes AX2550 Motor Controller User’s Manual Section Section Installing, Connecting and Using the Encoder Module 100 127 152 177 AX2550 Motor Controller User’s Manual Beware of Motor Runaway in Improperly Closed Loop Important Safety Important Safety Warnings What you will need Locating the Switches, Wires and ConnectorsAX2550 Quick Start Optical Encoders Program LED Sensors AX2850 only Display AX2550 Quick Start Connecting to the Batteries and Motors Connecting to the Batteries and Motors Signal Pin RC Mode RS232 Mode Analog Mode Connecting to the 15-pin Connector Connecting the R/C Radio Connecting the R/C Radio Button Operation Powering On the ControllerProg and Set button status Function Default Controller Configuration Default Controller ConfigurationParameter Default Values Letter Connecting the controller to your PC using Roborun Obtaining the Controller’s Software Revision Number Obtaining the Controller’s Software Revision Number = Software version 1.9b Exploring further Product Description AX2550 Motor Controller Overview Technical features Optical Encoder Inputs AX2850 only Technical featuresLow Power Consumption High Efficiency Motor Power Outputs Data Logging Capabilities Advanced Safety FeaturesSturdy and Compact Mechanical Design Power Connections Connecting Power and Motors to the ControllerPower Connections Connecting Power and Motors to the Controller Controller Power Mended Off Configuration Controller Power Powering the Controller from a single Battery Controller Powering Schemes Controller Powering Schemes Powering the Controller Using a Main and Backup Battery Powering the AX2550 with a Main and Backup Supply Connecting the Motors Converting the AX2550 to Single Channel Single Channel Operation MCU Power Fuses Power Regeneration Considerations Wire Length LimitsElectrical Noise Reduction Techniques Undervoltage Protection Overvoltage Protection Using the Controller with a Power Supply Using the Controller with a Power Supply Connecting Power and Motors to the Controller Basic Operation Input Command ModesGeneral Operation Basic Operation General Operation Selecting the Motor Control ModesOpen Loop, Separate Speed Control Open Loop, Mixed Speed Control Close Loop Position Control Closed Loop Speed ControlSelecting the Motor Control Modes Temperature-Based Current Limitation User Selected Current Limit SettingsSetting Continuous High Amps Motor Current = Battery Current / PWM ratio Battery Current vs. Motor CurrentBattery Current vs. Motor Current Temperature Max Amps Off Regeneration Current Limiting Programmable Acceleration Programmable Acceleration Command Control Curves Left / Right Tuning Adjustment Left / Right Tuning AdjustmentExponentiation Parameter Value Selected Curve Parameter Value Speed Adjustment Activating Brake Release or Separate Motor Excitation Emergency Shut Down Using Controller SwitchesEmergency Stop using External Switch Activating Brake Release or Separate Motor Excitation Using the Inputs to Activate the Buffered Output Special Use of Accessory Digital InputsInverted Operation Self-Test Mode Self-Test Mode Important Warning AX2550 Connections Connecting Sensors and Actuators to Input/OutputsAX2550 Connections Connecting Sensors and Actuators to Input/Outputs AX2550’s Inputs and Outputs Signal Type Use ActivatedAX2550’s Inputs and Outputs List and Pin Assignment Pin1 Connecting devices to Output C Connecting devices to Output C Connecting Switches or Devices to Input E Connecting Switches or Devices to Input F Connecting Switches or Devices to Input F Show how to wire the switch to this input Connecting Switches or Devices to EStop/Invert Input Analog Inputs Connecting Position Potentiometers to Analog InputsAnalog Inputs Ana Ana2 Operating Mode Pin Connecting Tachometer to Analog Inputs Operating Mode Ana 1 p11 Ana2 p10 Ana 3 p12 Ana 4 p8 Connecting Tachometer to Analog Inputs Temp oC Connecting External Thermistor to Analog InputsResistance kOhm Measured volts = controller reading + 128 * 0.255 Using the Analog Inputs to Monitor External VoltagesConnecting User Devices to Analog Inputs Using the Analog Inputs to Monitor External Voltages Internal Voltage Monitoring Sensors Internal Heatsink Temperature Sensors Temperature Conversion C Source Code Temperature Conversion C Source Code Connecting Sensors and Actuators to Input/Outputs Optical Incremental Encoders Overview Installing Connecting Using Encoder ModuleOptical Incremental Encoders Overview Recommended Encoder Types Installing, Connecting and Using the Encoder Mod Installing the Encoder Module Installing the Encoder ModulePulse Frequency in Hz = RPM / 60 * PPR Position of Encoder Module on Controller’s main board Connecting the Encoder Connecting the EncoderPin Name Cable Color Cable Length and Noise Considerations Voltage Levels, Thresholds and Limit SwitchesMotor Encoder Polarity Matching Voltage Levels, Thresholds and Limit Switches Wiring Optional Limit Switches Motor 1 Fwd Motor 1 Rev Wiring Limit Switches Without EncodersEffect of Limit Switches Wiring Limit Switches Without Encoders Using the Encoder to Measure Speed Using the Encoder Module to Measure DistanceMotor Fwd Motor Rev Using the Encoder to Track Position Using the Encoder to Track Position Distance = Destination Counter value / Divider RS232 Communication with the Encoder Module Encoder Testing and Setting Using the PC Utility Encoder Testing and Setting Using the PC Utility Installing, Connecting and Using the Encoder Mod Mode Description Closed Loop Position ModeMode Description Selecting the Position Mode Position Sensor Selection Closed Loop Position ModeSensor Mounting Feedback Potentiometer wiring in RC or RS232 Mode Feedback Potentiometer wiringFeedback Potentiometer wiring Pot wiring for RS232 or RC Command and Analog Feedback Feedback Potentiometer wiring in Analog Mode Analog Feedback on Single Channel Controllers Analog Feedback on Single Channel Controllers Sensor and Motor Polarity Using Optical Encoders in Position Mode Adding Safety Limit Switches Encoder Error Detection and ProtectionEncoder Error Detection and Protection SW1 SW2 Using Current Limiting as Protection Using Current Limiting as ProtectionControl Loop Description PID tuning in Position Mode PID tuning in Position Mode Closed Loop Position Mode Selecting the Speed Mode Closed Loop Speed Mode Tachometer or Encoder Mounting Using Optical Encoder for Speed Feedback AX2850 onlyTachometer wiring Closed Loop Speed Mode Speed Sensor and Motor Polarity Speed Sensor and Motor Polarity Adjust Offset and Max Speed Control Loop Description PID algorithm used in Speed mode PID tuning in Speed Mode Use of the LED Display Normal Fault Condition LED MessagesUse of the LED Display Motor Direction Status Normal and Fault Condition LED MessagesPossible Display Motor Comment Rapidly Flashing Fault MessagesFault Messages No Control Permanent Faults Temporary FaultsSelf-Test Display Self-Test Display = Software version 1.9b 108 C Operation C radio control mode Operation Selecting the R/C Input ModeConnector I/O Pin Assignment R/C Mode Pin Input or Number Output Signal Description Supplied Cable Description Input Circuit DescriptionInput Circuit Description RC Cable wiring diagram Powering the Radio from the controller Wiring for powering R/C radio from controller Powering the Radio from the controller Operating the Controller in R/C mode Connecting to a Separately Powered Radio Reception Watchdog Reception Watchdog Transmitter/Receiver Quality Considerations Important Notice about PCM Radios Joystick Deadband Programming Joystick Deadband Programming Joystick Calibration Left/Right Tuning Adjustment Automatic Joystick Calibration Automatic Joystick Calibration Activating the Accessory Outputs Data Logging in R/C Mode Data Logging in R/C Mode 122 Analog Control and Operation Pin Input or Number Signal Output Description Connector I/O Pin Assignment Analog ModeAnalog Control and Operation Connecting a Potentiometer Connecting to a Voltage SourceConnecting to a Voltage Source = U/R = 5V / 1000 Ohms = 0.005A = 5mA Selecting the Potentiometer Value Analog Deadband Adjustment Analog Deadband Adjustment Under Voltage Safety Power-On SafetyData Logging in Analog Mode Modified Analog cable with RS232 output data logging for PC Data Logging in Analog Mode 130 Use and benefits of RS232 Serial RS-232 Controls OperationUse and benefits of RS232 Serial RS-232 Controls and Operation Connector I/O Pin Assignment RS232 Mode Cable configuration Cable configurationExtending the RS232 Cable Bits/s, 7-bit data, 1 Start bit, 1 Stop bit, Even Parity Communication SettingsEstablishing Manual Communication with a PC Establishing Manual Communication with a PC RS232 Communication with the Encoder ModuleRoboteq v1.9b 06/01/07 s Data Logging String in R/C or Analog mode Entering RS232 from R/C or Analog mode Commands Acknowledge and Error Messages Command Type Description Controller Commands and QueriesRS-232 Watchdog Set Accessory Output Set Motor Command ValueController Commands and Queries Syntax Query Power Applied to MotorsQuery Amps from Battery to each Motor Channel Query Analog Inputs ?m or ?M Query Heatsink TemperaturesQuery Battery Voltages ?r or ?R Query Digital Inputs Reset Controller Read parameter Accessing & Changing Configuration Parameter in FlashAccessing & Changing Configuration Parameter in Flash Apply Parameter Changes Location Description Active after Flash Configuration Parameters List Value Mode See pages Input Control ModeMotor Control Mode Address Access Read/Write Effective After Reset Bit Definition See pages Amps Limit Acceleration Input Switches Function RC Joystick or Analog Deadband Address Channel Access Read/Write Effective InstantlyExponentiation on Channel 1 and Channel Default Encoder Time Base 1 Left/Right Adjust Default PID Gains Default Encoder Distance DividerJoystick Min, Max and Center Values Location Function Reading & Changing Operating Parameters at Runtime Address 82 P1 83 I1 84 D1 85 P2 Operating Modes RegistersRead/Change PID Values Bit Function Controller Status Register PWM Frequency Register Current Amps Limit Registers Controller Identification RegisterBit Model or Function Set/Reset Encoder Counters and Destination Registers RS232 Encoder Command SetRead Encoder Counter Or !Q n Read Speed Read Distance Read Encoder Limit Switch StatusRead Speed/Distance Read / Modify Encoder Module Registers and Parameters Switch ValueDD= parameter value Address Parameter Description Size Access Speed or Distance 1 or Switch StatusRegister Description Encoder Hardware ID code Register Description Counter Read/Write MailboxCounter 1 Destination Register 1 Encoder Threshold Distance 1Speed 1 Time Base 1 Counter Read Data Format Counter Read Data FormatDecimal Bit Hex Controller Output 164 Automatic Switching from RS232 to RC Mode Automatic Switching from RS232 to RC Mode Data Logging Cables Analog and R/C Modes Data Logging String Format Decimal to Hexadecimal Conversion Table Decimal to Hexadecimal Conversion TableDec Hex UDec Hex AX2550 Motor Controller User’s Manual 169 170 Programming using built-in Switches and Display Configuring Controller using SwitchesProgramming Methods Configuring the Controller using the Switches Entering Programming Mode Changing parameters Restoring factory defaultsSpecial Case of Joystick Calibration Programmable Parameters List Exiting the Parameter Setting Mode Programmable Parameters List Order Letter Description Possible Values default PagesSee 176 Downloading and Installing the Utility Using the Roborun Configuration UtilitySystem Requirements Using the Roborun Configuration Utility Connecting the Controller to the PC Roborun Frame, Tab and Menu Descriptions Roborun Frame, Tab and Menu Descriptions Getting On-Screen Help Parameter Selection and Setting and Special FunctionsFile and Program Management Commands View Controller Connector Pinout Loading, Changing Controller Parameters Control SettingsMotor Control Mode Loading, Changing Controller Parameters Power Settings Deadband Analog or R/C Specific SettingsLoading, Changing Controller Parameters Left/Right Adjust Acceleration Setting Closed Loop Parameters Encoder Setting and Testing Encoder Setting and Testing Encoder Module Parameters Setting Exercising the Motors Running the MotorsViewing Encoder Data Measurement Motor Power settingRunning the Motors Run/Stop Button Input Status and Output Setting Real-Time Strip Chart RecorderTransmit and Receive Data Logging Data to Disk Parameter Header Data type/range Measured Parameter Connecting a Joystick Terminal Screen Using the ConsoleUsing the Console Command Entry Keep Watchdog Alive Send Reset StringViewing and Logging Data in Analog and R/C Modes Loading and Saving Profiles to Disk Operating the AX2550 over a Wired or Wireless LAN Operating the AX2550 over a Wired or Wireless LAN Updating the Controller’s Software Roboserver screenshot when idle Updating the Encoder Software Creating Customized Object FilesCreating Customized Object Files Objectmaker creates controller firmware with custom defaults Mechanical Dimensions Mechanical SpecificationsMechanical Dimensions Mounting Considerations Mechanical Specifications Attaching the Controller Directly to a Chassis Wire DimensionsWire Gauge Outside Diameter Color Length Thermal Considerations Weight