VEX Robotics and COVID-19

The VEX Robotics World Championship has been canceled. Click here to read the official announcement from the REC Foundation. If you have any questions about VEX Worlds or other competition events, please contact customerservice@roboticseducation.org.

VEX Robotics is still shipping orders in accordance with our shipping policies and timelines. To best serve our customers, any freight orders will require manual confirmation in advance that you are still able to receive shipments.

If you have any questions or require special considerations, such as changing a shipping address on an existing order, please don't hesitate to contact sales@vex.com or 903-453-0802.

VEX Robotics and COVID-19

The VEX Robotics World Championship has been canceled. Click here to read the official announcement from the REC Foundation. If you have any questions about VEX Worlds or other competition events, please contact customerservice@roboticseducation.org.

In accordance with the Ontario Government, our Canadian office and warehouse will be closed until Wednesday April 8th, due to COVID-19. Orders will resume shipping upon our return. Please feel free to email us at casales@vex.com if you have any questions.

Thank you for your understanding during this difficult period. All the best and stay safe.

VEX Robotics and COVID-19

The VEX Robotics World Championship has been canceled. Click here to read the official announcement from the REC Foundation. If you have any questions about VEX Worlds or other competition events, please contact customerservice@roboticseducation.org.

To best serve our customers, any freight orders will require manual confirmation in advance that you are still able to receive shipments.

If you have any questions or require special considerations, such as changing a shipping address on an existing order, please don't hesitate to contact eusales@vex.com or 00 44 1925 251038.

VEX Robotics and COVID-19

The VEX Robotics World Championship has been canceled. Click here to read the official announcement from the REC Foundation. If you have any questions about VEX Worlds or other competition events, please contact customerservice@roboticseducation.org.

To best serve our customers, any freight orders will require manual confirmation in advance that you are still able to receive shipments.

If you have any questions or require special considerations, such as changing a shipping address on an existing order, please don't hesitate to contact eusales@vex.com or 00 44 1925 251038.

VEX Robotics and COVID-19

The VEX Robotics World Championship has been canceled. Click here to read the official announcement from the REC Foundation. If you have any questions about VEX Worlds or other competition events, please contact customerservice@roboticseducation.org.

To best serve our customers, any freight orders will require manual confirmation in advance that you are still able to receive shipments.

If you have any questions or require special considerations, such as changing a shipping address on an existing order, please don't hesitate to contact auinfo@vex.com or 61 08 8326 5500.

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VEX 2-Wire Motor 393 PTC Authenticator

Some VRC events may choose to conduct PTC Verification Testing using a PTC Authenticator to ensure compliance with Rule <R15> and help establish a fair playing field for all teams. The PTC Authenticator can be created using standard off-the-shelf VEX EDR hardware and pre-written code available for download below.

Note: V5 Smart Motors handle thermal protection differently than 393 motors, and this test is not necessary for teams using the V5 control system.

Software Needed

Download source code for your preferred programming package below. If necessary, first download and install a free software trial. More information about VEX programming options can be found on the VEX Programming Software page.

PTC Authenticator FAQ

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To ensure rule compliance and a level playing field for all VRC teams.
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Motors are powered through an inspector's PTC Authenticator and set to run full power in one direction. These motors are loaded (manually stalled by hand) and the results are observed. The inspector will watch until the PTC cuts current to the motor and it stalls.
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No. DC motors do vary by +/- 10%, but this variance WILL NOT cause a failure in the test.
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No. Our testing using this procedure at the 2014 VRC World Championship proved to be 100% accurate and conclusive and all of our internal testing and data (before and since) has been 100% accurate and conclusive as well. There are no “false positives” using this test.
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Based on extensive in-house testing and discussions with the PTC manufacturer, the PTCs in the motor will return to high levels (95%) of performance within 15-20 minutes of being tested. They will be "as good as new" within one hour after a test. Inspectors will do their best to keep this impact to a minimum and fair to all teams at an event.
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No. Based on all our testing of the PTCs and discussions with the manufacturer, we have no reason to believe that this is true. As described above, the motors suffer short-term impact from the testing, but over time they are as good as new.
VEX PTC Authenticator