Tool Port Homing Sensitivity Adjustment
Safety first! Before starting any repair, take a moment to review the safety information in your user manual. An online version of the guidelines can also be found here.
Port homing errors occur when the motor controllers for the Z or C tool ports are not able to register the home position. Symptoms of this are the Z/C lim error codes and a grinding noise when trying to home. We can increase the sensitivity of the motor controller to register the home position more accurately through console commands.
Before you begin
This guide will take you through updating NOVAs toolport homing sensitivity. Before beginning this guide you should have been in contact with our support team.
As you work through this guide please reach out to our email [email protected] or through the chat if you run into any issues or have any questions. We are more than happy to assist you virtually with this repair.
When in doubt, reach out!
Estimated Repair Time:
10 minutes
Port homing sensitivity adjustment
Test sensitivity
Now press the home button 3 times back to back to test the new sensitivity value.
If the error / grinding noise is still present keep decreasing the stall guard in increments of 2 until the error goes away.

If you are decreasing the value below 7 and there still seems to be an issue homing the port there might be something else going wrong that this adjustment will not fix.
Please reach out to our support team for further troubleshooting!
Adjustment Complete!
Congratulations, you have successfully adjusted NOVAs port homing sensitivity!
Please reach back out to our support team through `email ([email protected]) or the chat to let them know everything went well or share any photos, details, and feedback.
Related error codes
Unable to move to z-motor (z-lim), switch did not trigger
Unable to move to z-motor (z-lim), switch did not trigger
Unable to measure at z-motor (z-lim), switch did not trigger during initial approach
Unable to move to c-motor (c-lim), switch did not trigger
Unable to measure at c-motor (c-lim), switch did not trigger during initial approach
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