Vex Robotics Victor SPX User Manual Download Page 7

217-9191-751 

Victor SPX User Guide 

vexpro.com     ctr-electronics.com

 

Copyright 2018, VEX Robotics Inc., Cross the Road Electronics 

Updated: 2021-11-29 

Controlling a Victor SPX with a VEX Microcontroller: 

The Victor SPX is compatible with the following VEX microcontrollers: 

 

VEX

 V5 Robot Brain 

 

VEX

 ARM® 

Cortex

®

-based Microcontroller 

 

VEX PIC Microcontroller V0.5 

 

VEXpro ARM9 Microcontroller 
 

To connect a Victor SPX with any of the above VEX microcontrollers, simply plug the Victor SPX’s male PWM 
connector into the desired motor port on the microcontroller with the white (signal) wire on the “inside” of 
the microcontroller. 

If an extension cable is needed for the Victor SPX to reach one of these microcontrollers, a standard male-
female 3-wire extension cable should be used – these extension cables are available from VEX Robotics as 
well as many other online retailers. 

Note: 

The Victor SPX’s default calibration profile is configured for use with the roboRIO. To reconfigure it for 

use with a VEX microcontroller, follow the directions in the Calibration section.

 

Mounting the Victor SPX 

 

The Victor SPX can be mounted using either (2X) #8-32 screws or zip-ties. The Victor SPX’s aluminum and 
plastic case is electrically isolated from the electronics, meaning it is safe to mount directly to a robot’s 
frame! 

The Victor SPX’s mounting location should be chosen to allow for adequate air flow around the housing and 
sides of the case. Any Victor SPXs that are used for low-current applications may be stacked as shown 
below, but Victor SPXs used for high current applications, such as drivetrains, should be mounted individually. 

Summary of Contents for Victor SPX

Page 1: ...217 9191 751 Victor SPX User Guide vexpro com ctr electronics com Copyright 2018 VEX Robotics Inc Cross the Road Electronics Updated 2021 11 29 1 Victor SPX User Guide...

Page 2: ...PX 4 Wiring the Output 4 Wiring the Input 4 Controlling the Victor SPX 5 CAN bus 5 PWM 6 Mounting the Victor SPX 7 Strain Relief 8 Applying Power for the First Time 8 Additional Information 9 Brake Co...

Page 3: ...num heatsink create a lightweight motor controller while maintaining the full sealed fan less design that FRC teams expect This combined with a 3 sq in footprint a variety of built in mounting options...

Page 4: ...using tightly crimped connectors If the motor s inputs are not marked the polarity of the input may be chosen by the user Be sure to connect the output wires to motors with consistent polarity so eac...

Page 5: ...CAN bus To make this easier for teams we ve included a standard 3 pin 0 1 pitch connector on each of the Green Yellow twisted pairs One set of wires has a female connector and the other has a male co...

Page 6: ...he PWM period is how fast the robot controller can send a new PWM pulse The amount of time between the rising edge of one PWM pulse to the next PWM pulse should not be less than 2 9ms or greater than...

Page 7: ...a standard male female 3 wire extension cable should be used these extension cables are available from VEX Robotics as well as many other online retailers Note The Victor SPX s default calibration pro...

Page 8: ...ef All electrical connections should be isolated from any pulling or tugging that may result in a poor connection Once the Victor SPX is fully wired zip ties should be used to ensure that all electric...

Page 9: ...rake mode does not have any effect when the motor is not rotating but can make a large difference in robot behavior when used on a motor attached to a high reduction gearbox Brake mode does not impact...

Page 10: ...idly blink red green 2 While holding the button move the joystick or other input signal to full forward then to full reverse This can be done multiple times The Victor SPX is looking for max min PWM v...

Page 11: ...Power is being applied to Talon SRX LEDs Alternate1 Off Orange CAN Bus detected robot disabled LEDs Alternate1 Off Slow Red CAN PWM is not detected LEDs Alternate1 Off Fast Red Fault Detected LEDs Al...

Page 12: ...y cycle After the motor controller returned to room temperature the test was re run at 100 duty cycle During both tests temperature data was recorded at regular intervals The results are plotted below...

Page 13: ...ches it is a good idea to use a fan to cool the Victor SPX Q What kind of electrical connectors should I use to connect wires to the Victor SPX A The choice of electrical connectors is left to the use...

Page 14: ...r termination resistor at each of the two ends Each module can tap into the primary bus harness crimp connector soldered etc with a cable stub maximum length of one foot In the automotive industry thi...

Page 15: ...FRC team This topology may be used when performing basic testing on a bench setup with a small network few modules and short cable travel However this use case should not be construed as evidence guar...

Page 16: ...ENSURE THAT THE WIRES CONNECTED TO THE OUTPUT ARE NOT SHORTED AND THE INPUT IS NOT REVERSED ALSO VERIFY THAT NEITHER OF THE VICTOR SPX S MOTOR OUTPUT LEADS ARE SHORTED TO THE CHASSIS OF THE MOTOR OR...

Page 17: ...ged This condition is typically caused by a short circuit on the output or there has been an over current condition that caused a failure Check the following 1 Ensure the Status LEDs are changing betw...

Page 18: ...Check the following 1 Disconnect the output wires 2 Ensure the Status LEDs on the Victor SPX do not illuminate at any joystick position 3 Check the input at the Victor SPX BATTERY to GND with a voltme...

Page 19: ...pment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no...

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